Question my grand prix 3.8 v6 series 3 the car runs fine until gets warm then gets a surge of gas and nails it then bam the engine light starts blinking until i let off the gas!! Any any information please??
That was brilliant, Eric. If you ever get tired of turning wrenches, please teach the next generation of mechanics. You have so much skill, knowledge, and experience and a great way of teaching.
It could be that the lifter has failed? I’ve seen that happen where the rocker arm falls out of place because of the lifter. But then again, it would be quite loud when he started it
Wait, what did he just say about companion cylinders, top dead center, and little buddies? Sometimes I think we forget just how good this guy is at nut and bolt mechanics. We love what you do Eric. Thank you.
@@righteous1one Oh Captain hindsight 🤡 showed up. I’d say approaching this with just the engine codes as your guide his way was incredibly quick and efficient.
Eric you're a living legend. The concept of cylinder buddies, oh man, only someone with loooong flying hours can connect the dots out of such pico graph result. kudos.
It separates good mechanics from great mechanics... for example, Ray is a very good mechanic and would absolutely trust my car with him, but Eric is absolutely a couple of steps above Ray when it comes to in depth diagnostics. Ray usually also gets there, but with a lot more poking and guessing... Eric follows the clues, the evidence and the facts and zeros in to the problem.
As a Chrysler tech, the 3.7 and 4.7 are so common for the valve seats sliding out of the head and causing at best case spitting the rocker out. Worst case the seat gets out of position and then breaks (carnage ensues). Most common reason for the seats coming out is at some point it had got hot when the water pump failed.
I had a 3.7 that spat the follower. I removed the head and the valve had the loose seat in its teeth. Several other seats were loose. I had all seats staked.
My ram with the 3.7 and ram with hemi had the same issues. I bought them cheap after the owners gave up (different owners and 2 years apart). Great knowledge to know. Other jeep quirks I learned over the years are the broken wire in the door hinges (1996-2005) that cause random electrical issues and on the newer jeeps (2006 +) the computerized shifter may be dirty with carbon but show all the signs of a bad trans. I learned so much by being a hands on home mechanic with a background in small engines (atv, zero turns, small tractors)
The original thumping noise in the beginning was a pretty good tell because that's the would-be exhaust being exhausted through the intake as the intake valve opens.
"I always start with relative compression first". That applies even without the fancy tools. You just have to listen while cranking with the pedal to the floor, it's clearly not as simple as a coil or plug. So, for those general mechanics who throw parts, don't think that the use of fancy tools is what separates the smart guys from the rest. Just by listening, right out the gate he knew it had to be some kind of mechanical or timing problem. Is current mapping better than just listening? This case highlights that it is! Brilliant diagnostics, Eric.
It may not always be a mechanical issue if the cylinder has no compression from being washed out. There are also instances a RC test can lead you down the wrong road. It's better to have a pressure transducer in the exhaust and intake when doing an RC test so you see the full picture.
I marvel at the fact that people transport their problem cars for hundreds of miles to you (and Ivan) for repairs that require no parts. You provide shining examples of proper diagnosis and customer care.
The answer was in what had happened before, a new coil and spark plug which had done nothing because everyone else had not bothered to go beyond they why is the cylinder not working correctly other than making the Jeep a parts cannon.
Anyone can throw parts at a car at random or based on fault codes, but having the knowledge needed to figure out what parts it really needs (if any) is what seems to be rare!
I try to teach people don't just change plugs , pull a compression check first , no sense of putting lip stick on a dead pig ? But everywhere I go, they all got lip stick all over their shops ???
@@MikeSmith-nu9wt Even for people at home, I don't have a compression gauge, I'm not going to get one because I don't need it often enough, you can just play swap the parts on multi cylinder engines, and see if the problem follows. Single cylinder, I have just played swap parts with other used stuff to avoid buying anything until I know. Its just another diagnostic method for people without all of the tools.
@@snoopdogie187- compression gauge or leak down test kit are fairly inexpensive. If you don’t use it often, just get one at Harbor Freight. The leakdown tester is more specific and will tell you what is leaking (intake, exhaust or rings) but you need an air compressor to use it.
Eric O, I still like the small change in your sign off: "Remember Folks, if I can do it, you can do it, and if we can't do it, we'll get Mrs. O to do it." 😊
Great video! Excellent diagnostic process that led to a quick result. I'm a big 4.7 guy and have done a lot of work on these engines. Overall very robust and reliable. 300k+ miles is a common sight for these if maintained. That was a pretty unusual case for that engine to spit a rocker arm with how clean the engine looked inside. I think that it likely was because the lifter is starting to collapse; I would have pulled the lifter out and tried to squeeze it to check for any play. Also, I noticed that the serpentine belt is routed wrong on that 4.7. I don't know why, but I see so many of these engines (3.7s too) with the belt routed that same way...even when the belt routing diagram is posted right there on the fan shroud! It spins the water pump backwards and makes the engines run hot, leading to the valve seat dropping issue in some cases. That customer probably already picked up and left but you might wanna give them a call...🙂 Thanks for the video.
No. What thunk noise? Are you being serious or making a joke that I'm not getting?? 😀 Unless severely abused (i.e., oil or coolant problems), a 4.7 generally doesn't throw bearings. If it is neglected, it will spit rocker arms or blow head gaskets long before a main bearing gives out.
@@southwestvajeeper5106 Not a joke. if you listen to the video while he is doing the WOT crank test, i think before the plug comes out, there is definitely a rhythmic thunking noise while he is cranking......he commented that he didn't expect to hear that noise but then eric never addressed what it was? the noise did not happen once the plug was removed... maybe the noise was the cylinder decompressing through its intake valve? Sorry, I don't know anything about these motors; your comments just indicated you were really on top of them so i was hoping you could explain the noise in the video since eric O noted it but did not explain it. Thank you for your reply. take care..
It amazes me that a component within a very dynamic environment disconnects itself and finds a home out of the way and doesn't destroy a bunch of other stuff swinging, spinning, bouncin', springin' etc.. Like johnhufnagel said...
Can't remember if it was a 3.7 or 4.7 but I had a timing chain job once. That wasn't fun. After doing research on those motors I couldn't believe Chrysler went with them. But it was what it was. It got fixed and shipped out. And the other guys in the shop got some good laughs with all of the hollaring, swearing and whatnot coming from my bay. That thing was so finicky and the parts were expensive (had to replace chain guides as well). Your customer learned a valuable lesson. Instead of being the last shop yours should be the first shop to bring a sick vehicle to. Solid diag. and easy fix. Your customer was very lucky. That loose follower could of caused lots of damage.
Sounds like Jeep hated mechanics. Took me 2 days to replace an alternator on a 2006 3.0CRD. One of the other mechanics said he'd never heard so much swearing. Why 2 days, because I got so p'd off I had too walk away many times plus had other jobs.
Sounds like its got a cam! I absolutely love the (stethoscope) relative compression test. Hydro lock was my first guess but your companion lesson took it to the next level. Your ability to zero in on the problem brings a lift when facing an exhausting work day!
Impressed the heck out of me. Cylinder 7 showed an anomaly but you immediately knew a different cylinder was the problem and actually what the internal problem was. Impressive. I never could understand how a relative compression test could be done electrically but your explanation made it really simple to understand. Thanks.
I still can't understand why people don't come to you first of all, the amount of money they would save. You always have a thorough diagnosis of any problems. The amount of times I've heard you say that you were the customers last choice at fixing a car. Keep up the great work. Love from England ❤
The only thing I can think of is that his rates must be higher than anyone else, or like myself is in an area with lots of farmer shade tree mechanics.
People trying to save money is why. They don't think about the whole situation, they just think of how much more money one shop will charge VS another for labor. So they go to the shop with the cheapest labor rate. Then when that shop screws up they go to the next, and so on, until they finally end up at the shop they should have started with in the first place that charges more for labor, but they would have saved money if they would have just gone there to begin with LOL.
As a clueless old guy, I had no idea that the Pico system existed. Of course no matter how amazing the diagnostic equipment is, it still requires a skilled tech to do a proper diagnosis. Excellent work! I'm baffled though that the cam follower/rocker can simply fall out and then be popped back in without damaging anything. Please let us know if it comes back out.
My son worked for Pico briefly as an intern in college... he was collecting data both good and bad for their database that they make available to those who purchase their equipment
I know Dave over at the Motor City Mechanic has talked about this before. He has his own shop now, but he was a master tech at a mopar dealership. Down in Georgia I believe.
My old shop teacher taught me to put a crisp dollar bill to the exhaust tip . It should push out not suck in if the valves are opening. I bet Eric O knows that trick! Keep teaching Professor!
Hello there Eric, If you set a trigger on your channel with the current clamp you can force the scope to wait until certain condition are met before drawing on the screen. We recommend the settings below to our clients. 500ms/div time base 1-2MS/s sample rate Trigger mode of single or repeat (Single will get you one page. Repeat will get you multiple pages but the trigger conditions have to be met again) Simple trigger Source is wherever your current clamp is connected (ABCD) 5% Pre trigger puts the trigger point near the left side of the screen. This gives you 95%of the screen to capture your data to. Threshold of 200 amps in the rising direction With these settings the scope will wait until there is 200 amps of current flow through your clamp before drawing on the screen. If you have any questions or would like to discuss it further hit us up.
Right on! When I am doing an RC test I typically have the trigger at 50 amp, 10% pre trigger, 500ms/div, and a single capture. If I am being lazy (like this video) I just wait for the screen to refresh then hit the key 🤷🏼♂. Thanks for the suggestion and comment👍🏼
I had the same thing happen to me on a dodge Dakota. I fought that for a long time then took the valve cover off and found the rocker arm off of one cylinder. Reinstalled and that solved it. Then it happened again. Tore down both sides and used Schaefer’s penetrating lube on every valve on both sides and everything that moved. Checked the torque on every rocker arm and never had another problem.
Brilliant Eric!! From 3:45 to 4:45, check the basics first, & start simple! Learned that many years ago. Retired marine tech here. I always started a repair this way. What you did to diagnose was the way I was taught from the beginning, start with the basics! Spark, fuel, compression etc. If this would of been a marine engine from where I retired from and one of the young bucks got it, they would of connected the computer up, replaced parts, then scratched there head why it still misses. Love your work & videos, keep it up!!
Man i would love to work with a guy like you. I have a hard time trusting any mechanic but you are amazing. Very thorough diagnostics on everything you do ruling out any other possibilities. Im a 100% honest type of person myself! Dont stop doing what youre doing brother.
Just did this recently based on your older video. The lash adjuster had mostly collapsed though. But $20 for a new adjuster and he was on his way! Never would have tackled this without your encouragement.
the other interesting thing is the current draw for that cylinder gets progressively larger, until it "resets". there's also a distinctive chuffing sound coming from the engine every couple of rotations.
“Just remember if I can do it you can do it”. You have got to be kidding me. If that were the case the vehicle would not have been to multiple shops and still not fixed. Your diagnosing skills are second to none. I just wish there was someone like you near me. 👍
Pico delivers. Waiting on the mail is the hardest part....... 😊 I didn't trust ali express 99 cent attenuators. But when my $11 ones came in they are marked 'Made in China'. Knowing China outlaws patent infringement of their stuff, they should be safe. Gotta order some christmas tree loom holders from them anyways,
I build motors for a living and i've seen this a few times, the followers are just held by being stuck in between the lash adjusted (what you called a lifter) and the valve, there isn't really anything "positive" holding them just a sort of valley for the valve stem and the rounded seat for the adjuster. So a loss in pressure of the lash adjuster cos it's oil driven can cause have the follower fall off. A loss of pressure can be a bunch of reasons and it could be a quick momentary thing never to return, or could be a chronic bad adjuster. USUALLY this doesn't happen even if you have a bad adjuster because a bad adjuster rears it's head when the cam pushes down and that friction keeps the follower from falling off. But if the stars align it can happen and i've heard it happen once in person on a freshly rebuilt engine, because the engine sat in the shop for a couple months and one of the adjusters didn't have enough oil pressure on first start (wasn't primed) and it popped off once developed a misfire. and everyone's face went pale. Thankfully i've seen this before told them what happened and it was a quick enough fix. I've seen it on the ford modular engines as well, like the 4.6, 5.4s., it can happen to any V engine with the same valve design. It's not common on straight engines because gravity keeps the following from ending up sliding down even with a bad adjuster, the v engines the follower is at an angle. so gravity helps it fall off. BTW these 3.7 and 4.7s are exactly the same design, the 3.7 is just a 4.7 missing 2 cylinders and with a longer stroke for compression. I've considered making a stroker with 3.7 rods in a 4.7 but nobody likes these engines lol.
When you said a 4.7 I figured it would be the dreaded dropped valve syndrome i have seen on a couple of my 4.7. Pretty common in high mileage 4.7. New Head runs about $2k last time I had it done.
Less than one minute into an SMA video and Eric ‘drops’ a classic tip regards a GM vehickle and a flashing EML… this is why I watch SMA… Now for the rest of it..
Another superb diagnosis. The question is: why did it pop out? Temporarily stuck valve? Temporarily stuck lifter? Interrupted supply of oil to the lifter? I would not be surprised if this problem reoccurs. If it does, what would your plan of action be?
Thank you, Mr. O for choosing this method of diagnosis and bringing us along. That was just fascinating. This old dog learned something new about companion cylinders and how a quick relative compression test can show an engine's overall health. I must admit, that was fun, even as a spectator. 😊 Thanks again.
This guy & his videos are AWESOME, the “Make 7 UP YOURS” had me crying. Guess there are a few of the older peeps in here laughing it up too. Keep um coming Eric. Great job.
Not a problem just with newer cars. My grandfather had a 1975 Impala small block that started skipping (we now call it a misfire). I thought I heard a noise under one valve cover. I pulled it and found one rocker arm not moving. The bottom had broken out. A trip to my stash and found one with the correct ratio and fixed it. My grandfather was as impressed with me as I am with Eric.
Conductive compression test is definitely a handy too for gasoline engines. I learned something new today. Working on diesel engines mostly, no conductive option, but definitely simpler than testing one hole at a time with a compression gage.👌 Thanks Eric, you are one smart fella.🤙
@@joshdupont2209 You probably could, but the compression is so much higher that a stuck valve situation would be very obvious and usually much more catastophic.
I bet the customer red lined the engine causing valve float and that’s why the can follower ( rocker arm ) fell out. Anyway great video and you are one smart man with that troubleshooting. 👍
Nice video. I would love to have one of those scopes, but as a DIY not often a reason for it. I don't know why Eric is the last stop except that he actually fixes the problem. His rates are reasonable and he does not seem to fix with a parts canon.
I've had a few pop out on the 3.7 over the years, the root issue is the lash adjuster isn't staying pumped up. Best to replace that while the valve cover is off because odds are it'll throw the rocker again later when it fails. The little seal or valve inside the lash adjuster fails, intermittently at first. You can pull it and re-prime it with oil and it'll hold most of the time but keep compressing it and it'll just collapse at random. Eventually it'll start doing it pretty regularly. I keep a collapsed one in my box to show customers with ticking hydraulic lifters/lash adjusters and explain why changing their oil regularly helps prevent that from happening. That engine looks pretty clean so likely just a failed part. It's common enough on these engines they they make solid lash adjuster replacements where you set the lash manually like on a Honda and basically that's that until you need to adjust it again in 60,000 miles.
i know that "i do cars" guys would be happy to see the motor that clean. amazing what proper oil changes do! id suspect mine 3.7L V6 dodge would look the same as this one at 205K as I change every 3K
I have seen this on various vehicles over the decades. The first time was on an old Chrysler 2.2 engine. And the solution was to simply put the follower back in and its always fine. As to why, I do not know. I have no idea. But my theory is that the valve floated or the lash adjuster lost its prime.
I dont think this video could have came at a better time. I have the jeep GC 2006 with a 3.7. On the way home yesterday, it stalled out, will run, but sounds absolutely horrid. It sounds as it is about to stall at any time, no codes, and now i hear a fairly loud metal ticking noise coming from bank 2. I think you gave me something to look into. Thanks Eric!
You never fail to amaze me! Great job! Wish that fancy scanner wasn't so expensive. Of course, knowing how to use it is the biggest part of it! Rock on Eric!
I just had a comeback on a rocker that fell out. 2018 Forester P0301. Inward intake valve was stuck open at first then it was stuck shut. Found the cam follower sitting in the corner of the head, attributed both phenomenon to the follower being jammed. After it came back with a fuel flooded cylinder and an injector with a dented tip, I found the tumble generator flap broken off and banging around on the inside of the inward intake port in the head. Went right by those swirl generators and found it's way in the port.
On These 4.7s and 3.7s the cam follower is only held in with valve spring tension. The valves get gunked up over time and the height changes slightly allowing the follower to fall out. The fix is as Eric showed as well as do a top engine cleaning to "degunk" the valves, and it should be ok. This is why it's important to do the top engine maintenance on these engines.
Eric, As a retired electrical engineer, I'm so impressed with your diagnosis using an "o-scope". I never would have thought a cam follower would be a snap-in component. Upon seeing the separated follower, I immediately wondered whether someone had been exploring the V-8's redline. Perhaps a new teenage driver? I know I did in my mom's '68 Cutlass oh so long ago..
I've run into this before. Like Eric, I was the last stop on a 4.7 on it's way to the scrap yard. I ordered new lash adjusters and rockers for the whole engine after the second rocker came off. Still serving that Dakota even now. I gained a dedicated customer there. I had to use more mundane equipment but came to the same conclusion. Great job Eric, keep up the good work!
I’m old school did a similar job on a ford V6 way back, used a air-leak down gauge found the problem immediately, my son in law who was computer ( diagnostic ) guru didn’t know how to use them, looked at me like I landed from another planet , it was for me just a hobby 25 years ago, maybe the problem was a change of valve cover gasket ? That was mine, geez modern technology I see that you can diagnose much more with the knowledge of how to use these contraptions Your the man
Hi, I wanted to take the time to thank you for this quality video content. You do everything "solo" (shooting, repair, screencasts, editing...), yet your videos are of really high quality. Even taking the time to do multiple angles to shoot etc. I'm not a mechanic, just "interested in car technology" but the amount of knowledge you transport in an easy to follow matter is amazing. I really like your approach of understanding a problem fully first before doing anything and then establishing a way to check that the repair really succeeded. A lot of "solo mechanics" here on TH-cam will not do that and it really sets you apart from other mechanics. Also, the approach to diagnose many issues via current draw is a novel concept [to me as an inexperienced viewer] I've only seen on L1's and your channel so far. Others would have relied on visual inspection by endoscope or spray pattern where you just measure current draw.
When you can hear it popping in the intake, it's almost always a valve problem. I learned that from a old timer back in the 70s with Chevy's with a soft camshaft with the lobe worn off the cam.
Good Demo with the Pico I agree Eric Exhaust valve isn't opening on 4 Which is why 7 is Spiking so High on Current which is making both 4 and 7 cylinder both end Up under Compression @South Main Auto Repair LLC
On my Daughters Dakota the valve would stick in the morning when it was cold sometimes and the rocker or follower would come off! I told her to let it warm up a little before driving and switch syn oil and see what happens! from then on it was good. 6 Mo. later she bought another trk. Oh well!! Thanks Eric, you're helping people all around the world!👏👏👏👏👏
My 05 Ram 4.7 was getting a misfire cylinder 8 after a rain or car wash. For whatever reason water/moisture was pooling up around # spark plug well and inside the boot. Was going bananas trying to figure it out. Glad to have found the problem via help from You Tube!
Yeah, I came across this problem a couple years ago on my '03 Dakota with the 4.7 engine. Fault codes indicated a solid misfire on #6 cylinder. My method of diagnosis was to perform a standard compression check on each cylinder, with all spark plugs removed and the compression gauge connected in sequence to each cylinder. When I got to #6, the cylinder gave a normal compression pressure, BUT it also sounded different when cranking, as the cylinder was expelling the compressed air back through the intake--it made the "chuffing" sound that one other commenter mentioned here. Removal of the valve cover revealed that the cam follower on #6 exhaust had come off. Snapped it back in place as Eric described in the video, and it was fixed. I liked Eric's method a lot better, but this low-tech method worked too.
Amazing. Old school could only figure that out with previous experience on remove valve covers and look. Eric, I would think that when the customer goes through 3/4 shops for you to finally definitively fix the issue would become a customer for life.
In my day we that where trained on Sun Scope functions did the same thing, also dwell ,carb adjustments, etc. Great job of explaining the function of your analytical process!
Loved the comment about the 'Mustard dress' but the classicwas the comment about the police car, '5-0'.. People now days would not understand that! Loved It!
Wow, I love it when the detective nails it on the first effort. Then to top it off fixes the problem by snapping on a part that fell off. I bet the lady spent a few hundred when the other shop threw parts at it. Thanks for sharing! See ya later!
I’m soooo hooked watching your vids. You sir, have to be one of the best mechanics out there. I just wish I lived near you, I’d bring my car only to you knowing it’d be diagnosed properly every time.
Everything that you put on TH-cam actually helps me learn things that I have never done I don't vehicle and I think you for that because someday someone might come to me with that problem in at least then I'll know what the problem could be.
Given the title of this video, I was COMPLETELY GOBSMACKED at the root cause. Even better was the "No Parts Required" - which is like winning the troubleshooting lottery for everyone! Fantastic diagnosis - gonna remember this one for a long time.
What a great technique. With basic theory training being short on trades training its tough for the newbee to understand the concept. You are a great teacher and you make it understandable! Every apprentice should be required to watch your line.
Never ceased to be amazed at Eric's knowledge! There's a reason his garage is the last stop for vehicle repairs - they get fixed!
His garage should be the only place to repair local vehicles!
@@dennishayes65😅 If they do, Mss O would be wearing gloves with that dress. She is much needed for keeping Eric sane😂
@@RaveDaver
Next to every damn good mechanic is a damn good woman.
Would love to know what causes the problem
He should rename the shop "The last stop garage"
Eric just proves that nothing is better than a deep understanding and knowledge of how things are supposed to work.
Eric always makes it look easy. Watching him do his work like child’s play has always been such a pleasure. Thank you for bringing us along.
He's got an awesome diagnostic/analyzing brain... many great mechanics that would be jealous of this gift.
Question my grand prix 3.8 v6 series 3 the car runs fine until gets warm then gets a surge of gas and nails it then bam the engine light starts blinking until i let off the gas!! Any any information please??
That was brilliant, Eric. If you ever get tired of turning wrenches, please teach the next generation of mechanics. You have so much skill, knowledge, and experience and a great way of teaching.
He’s teaching with every video he produces.
@@elgastsos210He can do what ScannerDanner does. Teach in a classroom and just record it
he's already doing that
Believe me, he already is!
@@chainarmor448 His first student didn't last long. Couple of diagnostics and he was gone.
it's also amazing that it fell out and apparently did no damage to anything in the process.
I'm still wondering what caused it to pop out. It will probably happen again.
It could be that the lifter has failed? I’ve seen that happen where the rocker arm falls out of place because of the lifter. But then again, it would be quite loud when he started it
Eric you always do nice work, I wonder if Jeep has a bulletin on that problem ???? With a reason why it happened?
@@erictroshin3490Thats an OHC engine, no lifters just rockers
@@Erez84Hydraulic lash adjusters.
Not sure what amazes me more, Eric O abilities or the lack of diagnosis skills at the other shops
Even the dealerships can't diagnose high level type stuff anymore.
Wait, what did he just say about companion cylinders, top dead center, and little buddies? Sometimes I think we forget just how good this guy is at nut and bolt mechanics. We love what you do Eric. Thank you.
Who'd of thunk you could find a valve problem by checking starter current, but that's why you're the best.
Absolutely fantastic bit of diagnostics. Just goes to show what a real pro can do.
Waste of time lol. All was needed is a quick look in the cylinder.
@@righteous1one Oh Captain hindsight 🤡 showed up. I’d say approaching this with just the engine codes as your guide his way was incredibly quick and efficient.
@@righteous1one When's your video coming out?
@@Lq32332
Thanks for your Comment. It was on the minds of many!
Proverbs Chapter 18, Verse 2 comes to mind…
RL
@@Lq32332 Why are ya so bent about it though?
Eric you're a living legend. The concept of cylinder buddies, oh man, only someone with loooong flying hours can connect the dots out of such pico graph result. kudos.
Ability to diagnose is what really sets the mechanic from the diyer so far apart. I am amazed at your ability to diagnose! Love your videos.
It separates the few great mechanics from the rest of the mechanics. Most mechanics can’t diagnose anywhere close to his skill level.
It separates good mechanics from great mechanics... for example, Ray is a very good mechanic and would absolutely trust my car with him, but Eric is absolutely a couple of steps above Ray when it comes to in depth diagnostics. Ray usually also gets there, but with a lot more poking and guessing... Eric follows the clues, the evidence and the facts and zeros in to the problem.
Well…I can diagnose but I can’t fix 😂
Swapping parts is easy, it's knowing which parts to swap that sets a real mechanic apart from the techs.
I would not called a "Mechanic" but a Technician.
As a Chrysler tech, the 3.7 and 4.7 are so common for the valve seats sliding out of the head and causing at best case spitting the rocker out. Worst case the seat gets out of position and then breaks (carnage ensues). Most common reason for the seats coming out is at some point it had got hot when the water pump failed.
5.7 does it too, along with eating cam shafts.
I had a 3.7 that spat the follower. I removed the head and the valve had the loose seat in its teeth. Several other seats were loose. I had all seats staked.
My ram with the 3.7 and ram with hemi had the same issues. I bought them cheap after the owners gave up (different owners and 2 years apart). Great knowledge to know. Other jeep quirks I learned over the years are the broken wire in the door hinges (1996-2005) that cause random electrical issues and on the newer jeeps (2006 +) the computerized shifter may be dirty with carbon but show all the signs of a bad trans. I learned so much by being a hands on home mechanic with a background in small engines (atv, zero turns, small tractors)
@@allenrusselljr Broken wires to the door are very common on ZJs, earlier than 1996 also.
I came here to comment exactly this
The original thumping noise in the beginning was a pretty good tell because that's the would-be exhaust being exhausted through the intake as the intake valve opens.
You’ve seen it before. Errr heard it before. Nice addition
If it was a waste spark you would have gotten a two stroke out of the cylinder.
"I always start with relative compression first". That applies even without the fancy tools. You just have to listen while cranking with the pedal to the floor, it's clearly not as simple as a coil or plug. So, for those general mechanics who throw parts, don't think that the use of fancy tools is what separates the smart guys from the rest. Just by listening, right out the gate he knew it had to be some kind of mechanical or timing problem. Is current mapping better than just listening? This case highlights that it is! Brilliant diagnostics, Eric.
It may not always be a mechanical issue if the cylinder has no compression from being washed out. There are also instances a RC test can lead you down the wrong road. It's better to have a pressure transducer in the exhaust and intake when doing an RC test so you see the full picture.
I marvel at the fact that people transport their problem cars for hundreds of miles to you (and Ivan) for repairs that require no parts.
You provide shining examples of proper diagnosis and customer care.
The answer was in what had happened before, a new coil and spark plug which had done nothing because everyone else had not bothered to go beyond they why is the cylinder not working correctly other than making the Jeep a parts cannon.
Anyone can throw parts at a car at random or based on fault codes, but having the knowledge needed to figure out what parts it really needs (if any) is what seems to be rare!
I try to teach people don't just change plugs , pull a compression check first , no sense of putting lip stick on a dead pig ? But everywhere I go, they all got lip stick all over their shops ???
@@MikeSmith-nu9wt Even for people at home, I don't have a compression gauge, I'm not going to get one because I don't need it often enough, you can just play swap the parts on multi cylinder engines, and see if the problem follows. Single cylinder, I have just played swap parts with other used stuff to avoid buying anything until I know. Its just another diagnostic method for people without all of the tools.
@@snoopdogie187- compression gauge or leak down test kit are fairly inexpensive. If you don’t use it often, just get one at Harbor Freight. The leakdown tester is more specific and will tell you what is leaking (intake, exhaust or rings) but you need an air compressor to use it.
Eric O, I still like the small change in your sign off: "Remember Folks, if I can do it, you can do it, and if we can't do it, we'll get Mrs. O to do it." 😊
Early morning video with coffee! Can’t beat it! 😊
Great video! Excellent diagnostic process that led to a quick result. I'm a big 4.7 guy and have done a lot of work on these engines. Overall very robust and reliable. 300k+ miles is a common sight for these if maintained.
That was a pretty unusual case for that engine to spit a rocker arm with how clean the engine looked inside. I think that it likely was because the lifter is starting to collapse; I would have pulled the lifter out and tried to squeeze it to check for any play.
Also, I noticed that the serpentine belt is routed wrong on that 4.7. I don't know why, but I see so many of these engines (3.7s too) with the belt routed that same way...even when the belt routing diagram is posted right there on the fan shroud! It spins the water pump backwards and makes the engines run hot, leading to the valve seat dropping issue in some cases. That customer probably already picked up and left but you might wanna give them a call...🙂
Thanks for the video.
Very interesting reading & observation.......
Oh yeah you're right, the belt IS routed wrong. Customer might be coming back with the same problem again soon
do you think the "thunk" noise with cranking.was from a bearing on the crank that was about to go with the stress?
No. What thunk noise? Are you being serious or making a joke that I'm not getting?? 😀 Unless severely abused (i.e., oil or coolant problems), a 4.7 generally doesn't throw bearings. If it is neglected, it will spit rocker arms or blow head gaskets long before a main bearing gives out.
@@southwestvajeeper5106 Not a joke. if you listen to the video while he is doing the WOT crank test, i think before the plug comes out, there is definitely a rhythmic thunking noise while he is cranking......he commented that he didn't expect to hear that noise but then eric never addressed what it was? the noise did not happen once the plug was removed... maybe the noise was the cylinder decompressing through its intake valve?
Sorry, I don't know anything about these motors; your comments just indicated you were really on top of them so i was hoping you could explain the noise in the video since eric O noted it but did not explain it. Thank you for your reply. take care..
The fix was very well done, but WHAT ABOUT THE LOW PRESSURE IN THE LEFT REAR TIRE! 🚙😱😁
patch kit would mean parts required.
It amazes me that a component within a very dynamic environment disconnects itself and finds a home out of the way and doesn't destroy a bunch of other stuff swinging, spinning, bouncin', springin' etc..
Like johnhufnagel said...
Can't remember if it was a 3.7 or 4.7 but I had a timing chain job once. That wasn't fun. After doing research on those motors I couldn't believe Chrysler went with them. But it was what it was. It got fixed and shipped out. And the other guys in the shop got some good laughs with all of the hollaring, swearing and whatnot coming from my bay. That thing was so finicky and the parts were expensive (had to replace chain guides as well). Your customer learned a valuable lesson. Instead of being the last shop yours should be the first shop to bring a sick vehicle to. Solid diag. and easy fix. Your customer was very lucky. That loose follower could of caused lots of damage.
Sounds like Jeep hated mechanics. Took me 2 days to replace an alternator on a 2006 3.0CRD. One of the other mechanics said he'd never heard so much swearing. Why 2 days, because I got so p'd off I had too walk away many times plus had other jobs.
Someone has been revving that engine to the moon.
Forget the fallen rocker arm, we know it was the laying on of hands at 24:09 that really fixed the engine.
Sounds like its got a cam! I absolutely love the (stethoscope) relative compression test. Hydro lock was my first guess but your companion lesson took it to the next level. Your ability to zero in on the problem brings a lift when facing an exhausting work day!
Impressed the heck out of me. Cylinder 7 showed an anomaly but you immediately knew a different cylinder was the problem and actually what the internal problem was. Impressive. I never could understand how a relative compression test could be done electrically but your explanation made it really simple to understand. Thanks.
Don't forget he knew the problem was 4 because 4 was missfiring.
I still can't understand why people don't come to you first of all, the amount of money they would save. You always have a thorough diagnosis of any problems. The amount of times I've heard you say that you were the customers last choice at fixing a car. Keep up the great work. Love from England ❤
The only thing I can think of is that his rates must be higher than anyone else, or like myself is in an area with lots of farmer shade tree mechanics.
Probably is booked out for months.
People trying to save money is why. They don't think about the whole situation, they just think of how much more money one shop will charge VS another for labor. So they go to the shop with the cheapest labor rate. Then when that shop screws up they go to the next, and so on, until they finally end up at the shop they should have started with in the first place that charges more for labor, but they would have saved money if they would have just gone there to begin with LOL.
Just another Eric O Master Class.
Mrs O ,makes the show!
I wish I lived closer to your shop! Good mechanics like you are hard to come by.
As a clueless old guy, I had no idea that the Pico system existed. Of course no matter how amazing the diagnostic equipment is, it still requires a skilled tech to do a proper diagnosis. Excellent work! I'm baffled though that the cam follower/rocker can simply fall out and then be popped back in without damaging anything. Please let us know if it comes back out.
My son worked for Pico briefly as an intern in college... he was collecting data both good and bad for their database that they make available to those who purchase their equipment
I am surprised too about this cam follower/rocker, but, it's not a Toyota after all.
Guessing high RPM's or loss of oil pressure spit it out.
I know Dave over at the Motor City Mechanic has talked about this before. He has his own shop now, but he was a master tech at a mopar dealership. Down in Georgia I believe.
It's grandchild of oscilloscope
My old shop teacher taught me to put a crisp dollar bill to the exhaust tip . It should push out not suck in if the valves are opening. I bet Eric O knows that trick! Keep teaching Professor!
Fantastic diagnosis and repair. No parts used and it’s fixed, baby.
I was going to comment on how BRILLIANT Eric is, but I’d just be rehashing every comment on this video. Eric, you’re truly a genius!! Huge respect!
Hello there Eric, If you set a trigger on your channel with the current clamp you can force the scope to wait until certain condition are met before drawing on the screen.
We recommend the settings below to our clients.
500ms/div time base
1-2MS/s sample rate
Trigger mode of single or repeat (Single will get you one page. Repeat will get you multiple pages but the trigger conditions have to be met again)
Simple trigger
Source is wherever your current clamp is connected (ABCD)
5% Pre trigger puts the trigger point near the left side of the screen. This gives you 95%of the screen to capture your data to.
Threshold of 200 amps in the rising direction
With these settings the scope will wait until there is 200 amps of current flow through your clamp before drawing on the screen. If you have any questions or would like to discuss it further hit us up.
Right on! When I am doing an RC test I typically have the trigger at 50 amp, 10% pre trigger, 500ms/div, and a single capture. If I am being lazy (like this video) I just wait for the screen to refresh then hit the key 🤷🏼♂. Thanks for the suggestion and comment👍🏼
@@SouthMainAuto Thank you for doing what you do. If there is anything we can help with let us know.
I had the same thing happen to me on a dodge Dakota. I fought that for a long time then took the valve cover off and found the rocker arm off of one cylinder. Reinstalled and that solved it. Then it happened again. Tore down both sides and used Schaefer’s penetrating lube on every valve on both sides and everything that moved. Checked the torque on every rocker arm and never had another problem.
I assume at that point you also stopped cold rage starting it
"If I can do it, you can do it." Oh, I wish that were true. You're the best!
Knowing principles of operation always wins over the parts cannon. Eric proves this daily.
Brilliant Eric!! From 3:45 to 4:45, check the basics first, & start simple! Learned that many years ago. Retired marine tech here. I always started a repair this way. What you did to diagnose was the way I was taught from the beginning, start with the basics! Spark, fuel, compression etc. If this would of been a marine engine from where I retired from and one of the young bucks got it, they would of connected the computer up, replaced parts, then scratched there head why it still misses. Love your work & videos, keep it up!!
Man i would love to work with a guy like you. I have a hard time trusting any mechanic but you are amazing. Very thorough diagnostics on everything you do ruling out any other possibilities. Im a 100% honest type of person myself! Dont stop doing what youre doing brother.
Just did this recently based on your older video. The lash adjuster had mostly collapsed though. But $20 for a new adjuster and he was on his way! Never would have tackled this without your encouragement.
the other interesting thing is the current draw for that cylinder gets progressively larger, until it "resets". there's also a distinctive chuffing sound coming from the engine every couple of rotations.
I assume that's the sound of all that pressure in that cylinder rushing back out the intake tube when the intake valve opens.
@@jtjones4727 That would be my guess as well
I have been repairing/restoring cars for about 50 years but I always learn something from your videos. Also, Mrs "O" always brings a smile to my face
“Just remember if I can do it you can do it”. You have got to be kidding me. If that were the case the vehicle would not have been to multiple shops and still not fixed. Your diagnosing skills are second to none. I just wish there was someone like you near me. 👍
Pico delivers. Waiting on the mail is the hardest part....... 😊 I didn't trust ali express 99 cent attenuators. But when my $11 ones came in they are marked 'Made in China'.
Knowing China outlaws patent infringement of their stuff, they should be safe. Gotta order some christmas tree loom holders from them anyways,
Brother you are the best there is ! Very talented and knowledgeable. Thanks Eric .you deserve an award for the best channel on the tube.
i used to maintained some of the 4.7s in a fleet and this happened a bunch times, it will most likely happen again.
Yep collapsed hydraulic lifters are known on these
I build motors for a living and i've seen this a few times, the followers are just held by being stuck in between the lash adjusted (what you called a lifter) and the valve, there isn't really anything "positive" holding them just a sort of valley for the valve stem and the rounded seat for the adjuster. So a loss in pressure of the lash adjuster cos it's oil driven can cause have the follower fall off. A loss of pressure can be a bunch of reasons and it could be a quick momentary thing never to return, or could be a chronic bad adjuster.
USUALLY this doesn't happen even if you have a bad adjuster because a bad adjuster rears it's head when the cam pushes down and that friction keeps the follower from falling off. But if the stars align it can happen and i've heard it happen once in person on a freshly rebuilt engine, because the engine sat in the shop for a couple months and one of the adjusters didn't have enough oil pressure on first start (wasn't primed) and it popped off once developed a misfire. and everyone's face went pale. Thankfully i've seen this before told them what happened and it was a quick enough fix.
I've seen it on the ford modular engines as well, like the 4.6, 5.4s., it can happen to any V engine with the same valve design. It's not common on straight engines because gravity keeps the following from ending up sliding down even with a bad adjuster, the v engines the follower is at an angle. so gravity helps it fall off.
BTW these 3.7 and 4.7s are exactly the same design, the 3.7 is just a 4.7 missing 2 cylinders and with a longer stroke for compression. I've considered making a stroker with 3.7 rods in a 4.7 but nobody likes these engines lol.
When you said a 4.7 I figured it would be the dreaded dropped valve syndrome i have seen on a couple of my 4.7. Pretty common in high mileage 4.7. New Head runs about $2k last time I had it done.
Less than one minute into an SMA video and Eric ‘drops’ a classic tip regards a GM vehickle and a flashing EML… this is why I watch SMA…
Now for the rest of it..
Another superb diagnosis. The question is: why did it pop out? Temporarily stuck valve? Temporarily stuck lifter? Interrupted supply of oil to the lifter? I would not be surprised if this problem reoccurs. If it does, what would your plan of action be?
it's a Chrysler
Common hydraulic lifters, they like to stick compressed until oil pressure gets to it and forces it back out
Eric
you’re brilliant
and
I learned something more today
Thank you, Mr. O for choosing this method of diagnosis and bringing us along. That was just fascinating. This old dog learned something new about companion cylinders and how a quick relative compression test can show an engine's overall health. I must admit, that was fun, even as a spectator. 😊 Thanks again.
This guy & his videos are AWESOME, the “Make 7 UP YOURS” had me crying. Guess there are a few of the older peeps in here laughing it up too. Keep um coming Eric. Great job.
Hydraulic lash adjuster got gummed up and stuck down, seems like a pretty common problem on these. Replacing all 16 adjusters would be wise.
Yep been there too.
Not a problem just with newer cars. My grandfather had a 1975 Impala small block that started skipping (we now call it a misfire). I thought I heard a noise under one valve cover. I pulled it and found one rocker arm not moving. The bottom had broken out. A trip to my stash and found one with the correct ratio and fixed it. My grandfather was as impressed with me as I am with Eric.
Mr O is a credit to his profession. Once again, well done sir and thanks for taking us along for the rie
Conductive compression test is definitely a handy too for gasoline engines.
I learned something new today. Working on diesel engines mostly, no conductive option, but definitely simpler than testing one hole at a time with a compression gage.👌
Thanks Eric, you are one smart fella.🤙
Why couldn't you do a relitive compression test on a diesel?
@@joshdupont2209
You probably could, but the compression is so much higher that a stuck valve situation would be very obvious and usually much more catastophic.
Settling in for another great video Eric. Greetings from Australia :-)
I bet the customer red lined the engine causing valve float and that’s why the can follower ( rocker arm ) fell out. Anyway great video and you are one smart man with that troubleshooting. 👍
Eric really is "THE MAN" !
Nice video. I would love to have one of those scopes, but as a DIY not often a reason for it. I don't know why Eric is the last stop except that he actually fixes the problem. His rates are reasonable and he does not seem to fix with a parts canon.
Avoca is a very small town in the middle of nowhere. Most customers have to come a long distance to get there.
I've had a few pop out on the 3.7 over the years, the root issue is the lash adjuster isn't staying pumped up. Best to replace that while the valve cover is off because odds are it'll throw the rocker again later when it fails. The little seal or valve inside the lash adjuster fails, intermittently at first. You can pull it and re-prime it with oil and it'll hold most of the time but keep compressing it and it'll just collapse at random. Eventually it'll start doing it pretty regularly. I keep a collapsed one in my box to show customers with ticking hydraulic lifters/lash adjusters and explain why changing their oil regularly helps prevent that from happening. That engine looks pretty clean so likely just a failed part. It's common enough on these engines they they make solid lash adjuster replacements where you set the lash manually like on a Honda and basically that's that until you need to adjust it again in 60,000 miles.
Very clean high mileage motor on the inside. Kind of shocked at the amount miles on it. Very well maintained.
i know that "i do cars" guys would be happy to see the motor that clean. amazing what proper oil changes do! id suspect mine 3.7L V6 dodge would look the same as this one at 205K as I change every 3K
26:45 This might be the video you're thinking of "Jeep Liberty: Cranks, Starts, Stalls, Runs Rough- Part I/II" Mar 24/25, 2018
I have seen this on various vehicles over the decades. The first time was on an old Chrysler 2.2 engine. And the solution was to simply put the follower back in and its always fine. As to why, I do not know. I have no idea. But my theory is that the valve floated or the lash adjuster lost its prime.
The same happened to me on an old Chrysler 2.5T.
On these, they are hydraulic lifters, springs tend to fail on them and they stay collapsed till oil pressure pushes them back up.
New tech over complicates things..breaks easy ..more power that's it...
@@Sicktrickintuner that may be right, but when 50,000 miles go by afterwards and the follower hasn't fallen off again....???
You are a very smart man. I always laugh when you say, "Remember, if I can do it, You can do it." ... ummm nope.
I am so impressed by that whole technique of compression testing. Great to learn from such a pro.
Never seen that method used for compression testing, thanks for sharing and great diagnostic work!
I dont think this video could have came at a better time. I have the jeep GC 2006 with a 3.7. On the way home yesterday, it stalled out, will run, but sounds absolutely horrid. It sounds as it is about to stall at any time, no codes, and now i hear a fairly loud metal ticking noise coming from bank 2. I think you gave me something to look into. Thanks Eric!
I have actually seen this 3 times and it was always cylinder 4 exhaust follower
Keep up the good work , you are a good mechanic .
You never fail to amaze me! Great job! Wish that fancy scanner wasn't so expensive. Of course, knowing how to use it is the biggest part of it! Rock on Eric!
I just had a comeback on a rocker that fell out. 2018 Forester P0301. Inward intake valve was stuck open at first then it was stuck shut. Found the cam follower sitting in the corner of the head, attributed both phenomenon to the follower being jammed. After it came back with a fuel flooded cylinder and an injector with a dented tip, I found the tumble generator flap broken off and banging around on the inside of the inward intake port in the head. Went right by those swirl generators and found it's way in the port.
Great thought process, Eric! Spot on diagnostic and repair was very rewarding - no parts required :-)
On These 4.7s and 3.7s the cam follower is only held in with valve spring tension. The valves get gunked up over time and the height changes slightly allowing the follower to fall out. The fix is as Eric showed as well as do a top engine cleaning to "degunk" the valves, and it should be ok. This is why it's important to do the top engine maintenance on these engines.
Eric, As a retired electrical engineer, I'm so impressed with your diagnosis using an "o-scope". I never would have thought a cam follower would be a snap-in component. Upon seeing the separated follower, I immediately wondered whether someone had been exploring the V-8's redline. Perhaps a new teenage driver? I know I did in my mom's '68 Cutlass oh so long ago..
Even my cardiologist with all his EKG experience would be impressed !! You are a Car Cardiologist !!
Great video Eric, I'm always learning 👍
Favorite TH-cam channel. Love every video. 👍
I've run into this before. Like Eric, I was the last stop on a 4.7 on it's way to the scrap yard. I ordered new lash adjusters and rockers for the whole engine after the second rocker came off. Still serving that Dakota even now. I gained a dedicated customer there. I had to use more mundane equipment but came to the same conclusion. Great job Eric, keep up the good work!
I’m old school did a similar job on a ford V6 way back, used a air-leak down gauge found the problem immediately, my son in law who was computer ( diagnostic ) guru didn’t know how to use them, looked at me like I landed from another planet , it was for me just a hobby 25 years ago, maybe the problem was a change of valve cover gasket ? That was mine, geez modern technology I see that you can diagnose much more with the knowledge of how to use these contraptions
Your the man
Hard to believe that the dislodged cam follower didn't migrate to a place where it would cause way more destruction. Lucky customer!
Hi, I wanted to take the time to thank you for this quality video content. You do everything "solo" (shooting, repair, screencasts, editing...), yet your videos are of really high quality. Even taking the time to do multiple angles to shoot etc.
I'm not a mechanic, just "interested in car technology" but the amount of knowledge you transport in an easy to follow matter is amazing. I really like your approach of understanding a problem fully first before doing anything and then establishing a way to check that the repair really succeeded. A lot of "solo mechanics" here on TH-cam will not do that and it really sets you apart from other mechanics. Also, the approach to diagnose many issues via current draw is a novel concept [to me as an inexperienced viewer] I've only seen on L1's and your channel so far. Others would have relied on visual inspection by endoscope or spray pattern where you just measure current draw.
When you can hear it popping in the intake, it's almost always a valve problem. I learned that from a old timer back in the 70s with Chevy's with a soft camshaft with the lobe worn off the cam.
Good Demo with the Pico I agree Eric Exhaust valve isn't opening on 4 Which is why 7 is Spiking so High on Current which is making both 4 and 7 cylinder both end Up under Compression @South Main Auto Repair LLC
Awesome diagnosis and explainer for the lay man DIYer. Had no idea the rocker lifter is designed to just snap on. 😱
On my Daughters Dakota the valve would stick in the morning when it was cold sometimes and the rocker or follower would come off! I told her to let it warm up a little before driving and switch syn oil and see what happens! from then on it was good. 6 Mo. later she bought another trk. Oh well!! Thanks Eric, you're helping people all around the world!👏👏👏👏👏
What a great lesson Eric. This from a guy who couldn't even figure out the Sun meter back in the 60s...
Yes Eric, the 4.7 & the 3.7 and Guess where I remembered this from ,SMA!!!! You are the man!!
Don’t forget to check the engine oil for gas contamination. Especially with the newer engines that run 0w20! Good job Eric
My 05 Ram 4.7 was getting a misfire cylinder 8 after a rain or car wash. For whatever reason water/moisture was pooling up around # spark plug well and inside the boot. Was going bananas trying to figure it out. Glad to have found the problem via help from You Tube!
Yeah, I came across this problem a couple years ago on my '03 Dakota with the 4.7 engine. Fault codes indicated a solid misfire on #6 cylinder. My method of diagnosis was to perform a standard compression check on each cylinder, with all spark plugs removed and the compression gauge connected in sequence to each cylinder. When I got to #6, the cylinder gave a normal compression pressure, BUT it also sounded different when cranking, as the cylinder was expelling the compressed air back through the intake--it made the "chuffing" sound that one other commenter mentioned here. Removal of the valve cover revealed that the cam follower on #6 exhaust had come off. Snapped it back in place as Eric described in the video, and it was fixed. I liked Eric's method a lot better, but this low-tech method worked too.
Amazing. Old school could only figure that out with previous experience on remove valve covers and look. Eric, I would think that when the customer goes through 3/4 shops for you to finally definitively fix the issue would become a customer for life.
In my day we that where trained on Sun Scope functions did the same thing, also dwell ,carb adjustments, etc. Great job of explaining the function of your analytical process!
Loved the comment about the 'Mustard dress' but the classicwas the comment about the police car, '5-0'.. People now days would not understand that! Loved It!
Wow, I love it when the detective nails it on the first effort. Then to top it off fixes the problem by snapping on a part that fell off. I bet the lady spent a few hundred when the other shop threw parts at it. Thanks for sharing! See ya later!
I’m soooo hooked watching your vids. You sir, have to be one of the best mechanics out there. I just wish I lived near you, I’d bring my car only to you knowing it’d be diagnosed properly every time.
Sherlock nailed it again. Simply a process of alemination, my dear Watson.
Everything that you put on TH-cam actually helps me learn things that I have never done I don't vehicle and I think you for that because someday someone might come to me with that problem in at least then I'll know what the problem could be.
Given the title of this video, I was COMPLETELY GOBSMACKED at the root cause. Even better was the "No Parts Required" - which is like winning the troubleshooting lottery for everyone! Fantastic diagnosis - gonna remember this one for a long time.
What a great technique. With basic theory training being short on trades training its tough for the newbee to understand the concept. You are a great teacher and you make it understandable! Every apprentice should be required to watch your line.
Please keep making videos! This is for sure one of my favorite channels on YT.
Eric, well done sir, you make it enjoyable to learn, see old dogs can still learn.