Tow in & Runs Rough From Near Major Failure. Can It be Saved?
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- เผยแพร่เมื่อ 22 มิ.ย. 2023
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@WrenchingWithKenny @matersworkshop6123 @traditionovertrend2704 @SNAFU.performance #wrenchingwithkenny #keepwrenching #wesselmotorworks #gmc #ford #chevysilverado #sierra - ยานยนต์และพาหนะ
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You can stick a Borescope thru the sparkplug hole and look at the valve and piston for damage. If the piston hits the valve even slightly there will be a mark on the piston .
To be safe Kenny, put the piston near the top to prevent the valve from dropping in cylinder.
Im old school I remember 45 years a go I had a couple of broken valve springs , I would take a Q-tip with some valve grinding compound and go through the spark plug and put some on the valve seat , then take a drill and turn the valve left and right to reseat it , this was done on a fairly new 78 ford 400 , and a 350 GM motor . have fun Kenny .
Another great episode! Real mechanic work in this one. Fantastic job of diagnosing the problem!
I have found the best method is to turn the engine over until the piston of the cylinder you are working on up to its almost at TDC then even if you do lose both valve collets the valve can only drop so far into the cylinder. I have also used air pressure method to change the valve stem seals on my Jaguar straight six. Good diagnosis and I think you are right there is probably carbon on the valve preventing it from sealing, good call just to replace the spring.
Hi Kenny, :)
How I learned to keep the valve from dropping into the cylinder when replacing valve springs is to take the sparkplug out and then stuff rope inside the cylinder. It keeps the valve in place when removing the broken spring and the keepers.
Yep, the old rope trick. I used that trick on my airplane engine once when it had a bad valve rotator.
I have always had luck with air. Except 1 time. I had to use the rope method.
That works too but I just keep the piston at tdc
I’ve got a 2020 transit connect van. It’s had two recalls, it’s got 15000 miles on it, it had mice in the blower housing brand new, it had an a/c issue, the automatic door lock for the drivers side sliding door still doesn’t work, I cleaned the mice nest out and found out there must be some duct work missing because there was a 6”x6” hole where mice could just walk into the blower housing, and also had a check engine light related to the cam shaft sensor that had to be fixed. I told my dog, I don’t know which is worse, being unamerican or driving a van that always breaks down. Used to have a little Nissan pickup and drove it over 50000 miles and only had to put a battery in it. Who knows maybe just bad luck
Sounds rough. I feel bad driving imports some times, and if American cars were more reliable I would get one.
Both my sisters had jeeps. Both had engine and drivetrain issues. They both drive Toyotas now.
My neighbor has two Chrysler 300’s. One broke down a year or two ago and his new one he got a couple months ago has been on jack stands all week. He dailys his 86 Subaru.
My buddy had a dodge truck that I helped put a new engine in. His family is a ford family though. His dad had several diesel ford trucks, other ford suvs including an excursion with a v10. Also a fox body Mustang for fun. Anyway, Last year after rebuilding the engine in his truck for the 3rd time (he’s a retired engineer that worked on jet engines, and can fix anything.) he gave up on his fords and got some kind of dodge hybrid truck to tow his toy hauler around. So far it’s holding up.
They don't build Nissan's like they used to...
Looking forward to this repair. 😉👍🏼
That was an interesting video. Thanks for the tips. Great Diag.
Mission improbable but we know you will do it... the correct way too.
Thank s
We’ll see how this works out. Good vid. Thanks
Wow! Super complicated in my view. Great work brother Kenny!
One of your best videos. Follow up video would be awesome. FYI the lisle on car valve spring keeper tool works great. 👊🏻
Good afternoon Mr Kenny hope y'all had a great day 😁
OK Kenny, You've peaked my interest. I own a 2017 GMC Sierra 1500 4.3 Liter V6 EcoTec3 LV3 Engine (4.3 Liter Engine, Vin code H). My 2017 gets over 30mpg driving over and back to a house I own. Both ways eliminates the uphill downhill or wind affect. That is amazing. But I only drive 60mph and I am very aware of my driving characteristics, I drove for Fuel Economy at GM for 36yrs. Interesting: The 4.3 reduces to 2.9 liters in V4, where the 5.3 = 2.7, so the 4.3 actual size is bigger in V4 mode than the 5.3, which might account for the bigger more noticeable engine shake in AFM mode. And Ken; you were going to find out which cylinders shut off on that 4.3, Please Tell. Last: If the valve ever contacted the piston, even if it was only a kiss, I'd replace it no matter what. It's kind of like the Fram commercial, pay for the repair the right way now or pay a lot more when it destroys the piston, cam, block, head etc. Can't wait for the next vid. ben/ michigan
Had a 4.3 before my current 5.3. It was a great engine(for me) and never had issues with the 6l80
Spare keepers stored in the sump ? --- Back in the 1984 UK factory garage our mechanic took an oil pump apart and found it was keeper wedged inside the pump, further investigation he found 2 more spare, they had been banging on the mesh pump strainer intake and made a hole.
He dropped the sump and cleaned it out.
Later he took the rocker cover off expecting to find where they had come from ? none missing ? the van was fixed and ran well.
Hey Kenny: New sub here, I Love your vids. I can’t believe I most have just caught your video when you posted it.
I love “The Kenny University”
My 2000 Express van has a 4.3 & so far an excellent engine, pushing 200k.
Yes, but these new 4.3 engines have nothing in common with the old 4.3 and the 5.3 for that matter.
thats okay Kenny I got a big block slant six... rare stuff😉
Will be interesting to see if this works out without pulling the heads. I would say just do a valve job, have the heads reworked, but that motor may have too much wear. I'll keep my fingers crossed and hope changing that spring works. Also hope that is the only one. I had one before that had a broken rocker arm. I changed it and it worked out, blind luck.
I have a 03 Sonoma with the old 4.3, apart from two intake gaskets I have never had a problem with the engine.
No biggie with dropping the keeper.
Every great mechanic has an occasional moment.
You were on auto pilot when you were tapping the valve because normally the spring wouldn’t be broken and you would only have had a lock/key loose if you had the spring compressor on the keeper under tension.
So I say - don’t sweat it. Ya didn’t break anything and you’re going to fix it anyway when you get the parts.
Keep all the great content coming. It makes me feel like I’m still in a shop. Which I haven’t been in years…
😉👍
Live and Learn
Ken, why didn't you raise the piston to TDC to prevent the valve from dropping into the cylinder if a oops happened? It's easy enough to lock the crank in place to prevent it from rolling when air is applied.
Livin on the edge...
It works I've done that my whole life never lost a valve did I loose air pressure when the keepers were off yep but valve dropped maybe half inch or so just pull it back up apply air and resume work simple stuff
Cool content . Must be a LT based V6 ? Maybe it's time for 12 valve springs? I'd replace the broken spring , quick slap back together and start it to see results . Kenny's videos are 100% based in reality which is rare on YT .
When they run that bad, I go straight for compression. Usually 0 on at least 1 cylinder
An endoscope would really help inspect the cylinder and valves here.
Again, the wrecker living up to do the impossible. It is a marvel of engineering. Great job well done to Matt's crew
You wouldn't think it would with modern engines killing the injector fairly quick when detecting misfires, but very often on the GN V6 and V8 it will burn a hole in the intake manifold plenum when the intake valve spring breaks. Of course, that's even more possible with this one since it has no misfire DTC's. A smoke test would be good if you wanted to let your customer know sooner rather than later.
From my experience with the GM moving trucks at work that 4.3 actually runs better than the V8's. Doesn't have the horrible rough idle and actually feels more peppy.
a new engine for all of us
Happened to my Escalade. Ended up replacing the cylinder head too. Dealer charged $4,500 for all that. Ouch!! Seemed high but sounded as terrible and I couldn’t drive it. Looking forward to see how far you have to go in this one.
What did they do? Install a reman head?
Boy you really saved a lot of money on Gas though. Ha. fool
@@benjamincresswell3713 🤡
Seen lots og guys out here in CA with bad DOD or AFM at 120k or so. Its so popular there are guys on marketplace and offerup who will turn it off for you, for a fee of course. You can buy the delete kit online. Bunch of TH-cam videos on the delete as well.
The upper right corner of your code reader was showing misfire count adding up. Just was not showing which cylinder.
Holy crap. the wife walked into the room and started yelling at me and beating me. She was upset that I was watching Wenching with Kenny! I told her put your stinking glasses on there's an R in that word it's WRENCHING not wenching. Just kidding. BAAAAAAWAAAAHAHAHAHAAAAAAAAAAAAAAAAAA.
I have had Chrysler 3.6 do this twice
The 3.2 and 3.6 engines destroy roller rockers on a regular basis. Got to replace them as soon as the ticking noises start otherwise they proceed to grind the lobes off the camshafts. The rockers are dirt cheap but the cams are crazy expensive.
I got the 2002 4.3 Vortec in my Blazer ZR2 & she runs so great.
Not sure why they put smaller engines in larger trucks that work harder.
You can't even feel my engine running with the A/C on at a red light & it's still getting 16mpg in 2023 with over 300k miles on her.
They are great engines, if you take of them.
16 mpg.....that's terrible....🤔🙄😳🇬🇧
It's a 350 with 2 cylinders lopped off the bore and stroke and most of the internals are the same it explains it's torque and durability no
I believe that the AFM on the 4.3 disables cylinders 1, 4, and 5. Actually making it a 3-cylinder. Because there's no way to make a V6 fire anywhere close to evenly on 4 cylinders.
Kenny I have a question. Why do you not check the oil first on the engines you work on? Or do you just not show that part? That's the first thing I look at on any car before I start it just to rule out no oil. I'm just a home D Y I guy but I work on and drive family members and friends cars
A broken spring like that will make it run rough for sure. Hopefully that's all of the damage
Great video Kenny looking forward to the next one, it will be nice if just a spring fixes it!
I had the AFM programmed out of my 2014 Silverado 5.3 at about 120k . Never had any issues, got decent gas mileage, regular oil changes. Had 250k on it when I traded it in. Great truck and engine. Transmission? Not so much!
I just worked on a friends 2014. Had most of the engine apart for oil leaks. They are getting more time consuming to work on. 14 hours for valley cover, timing cover, oil pan, right side cylinder head gasket and engine/trans cooler lines. And I work fast.
I'll check for a valve spring broken
How did it break a spring winding the snot out of it thats the only time ive ever broke a valve spring was beating on it and decent too not just one time to the floor i mean low range 2nd gear and hit the hill dont let off till you hit the top beating on it. 6 thousand rpms for 4. Or 5 mins beating on. It
If one spring has broken, the likelyhoood of another going soon is a lot higher.
A GMC Silverado,lol
I have the 2014 GMC 4.3 it's been a great truck. 250.000 k just started running rough like this one. It keeps telling me maf sensor. Cylinder 5 misfire. Then says something else nxtime the light comes on,it will say fuel injector. All of these parts are new. ?
If you bought this truck new and never changed the MAF, it could be bad. make sure you replace with OEM only.
Piston should have been set at TDC...Ill wager that valve stem ISN'T bent....Its possible to fit a new valve spring without removing the head too....🤔🙄😳🇬🇧
That is the worse generation of GM trucks ever built. Everything on that truck will break and they are nothing but money pits.
Why would you have the piston at bdc and not tdc what if you for some reason loose air and spring pressure you will definitely be pulling the head off it will swallow the valve but at tdc it won't it just dropped till the piston stops it and it's not running or anything so it won't hurt it any I always do my valve seals and stuff w the piston at tdc and it's saved me once or twice too believe It
DOD is the stupidest thing as bad as the 4-6-8 caddy days.. i get better mileage without it on. tho i live in northeast. if out west on flats. yeah maybe big maybe.. but not in the northeast.
Go to 3:33 for evidence that Kenny has been staying up way too late at night editing TH-cam videos
Just did all afm lifters on 2015 tahoe 5.3. Dumbest GM fopar ever.
It's cheaper to keeper
Afm delete
I could hear the mechanical misfire during Cranking.
Dit dit dah, dit dit dah.... Cranking cadence sounds horrible... Compression!
Put the effected cylinder at TDC, whenever playing with valves... You CAN NOT lose a valve into the cylinder by making a mistake with the valve keepers.
I do head-on valve seals WITHOUT shop air... As long as the piston stays at TDC.
SR. I NEED YOUR HELP 🙏🙏🙏
I replaced the knock sensor in my truck 4 times already and the code came up again and again I don't know what to do now , I also buy the ones from the diler and still the same ., We check the wires from the sensor to the computer and they're good 😢 I don't know what else to do even the mechanics 😅😅 can you please give me and idea of what to do ???
GMC SIERRA 2006 5.3 1500 THANKS....
What fault codes are you getting? How does the engine run?
@@edwardspaccarelli5944 P0332(1/2)stored
Knock sensor 2 circuit low
Voltage bank 2
DTC severity 2 of 3 : repair
This is exactly how it's showing in the scanner , and the motor has power that runs good , the motor is stable we also replace the oil pan gasket and valve cover gasket , I saw a video that says to erase the code and turn on the truck and accelerate to 5 mp for 5 seconds twise and the code come again, I don't know what else to do and the mechanics that I know don't know what to do too lol 😂😆😅
@@andresayala7871 there’s a video on the South Main Auto TH-cam channel that show’s knock sensors diagnosis and repair on 2006 GMC Sierra. I hope it helps you out.
@@edwardspaccarelli5944 ok I will check it out thanks 🙏
Turn it off !!!!