Cylinder Head 205 - Degree DOHC Camshafts
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- เผยแพร่เมื่อ 4 ก.ค. 2014
- This video is all about establishing your valve timing baseline, and adjusting your camshafts to the manufacturer's spec. It's only ONE of several steps that should be performed when you're assembling your engine on an engine stand. Establishing these conditions with accuracy while your engine installed in the car is a near-impossibility, and the reason why... is demonstrated in this video. There are several challenges to overcome when performing these procedures on a 4gxx series Mitsubishi engine, and they're all defeated here.
The cylinder head used in this video is a J1 spec '92 Hyundai Elantra small-combustion chamber head which has had several valve jobs and has been resurfaced multiple times by budget engine remanufacturers who didn't care about quality control, as well as performance shops who do. It has had no less than .040" removed from the head gasket surface, the valves are recessed because of all the valve jobs performed, and at some point when it was cut, it wasn't level. Removing material from the deck surface will change the installed camshaft centerline, and that will change your engine's valve timing events even if all other parts remain the same.
I would claim this is a multi-part video except that I've got the videos broken up by topic already, and this one is all about setting your cams to the manufacturer's specification. It is not the end of testing that will be performed with these tools. The basics concerning the process and tool fabrication are covered here. Further discussion on this topic concerning the effects of advancing or retarding camshafts from spec, and for checking your valve clearance will be in the videos that follow. I had to end this video after the manufacturer's spec was achieved to make it easier to digest, and because it would have created a video greater than one hour in length despite the break-neck speeds that things happen here on Jafromobile.
Where your cams are set determine how the swept volume of the combustion chamber gets used. The information on the manufacturer's spec sheet is their recommendation for baseline settings that will help you get the most out of those camshafts. Whether or not your engine can operate with those specifications without additional hardware or without causing a catastrophic failure will be expanded upon in Cylinder Head 206. The next video should be used as a companion to this video because establishing the manufacturer's baseline is not the end of the assembly or testing process. It's only half the battle. Should you be lucky enough to find your combination of parts allow your camshafts to fit and requires no additional adjustment after assembly, the steps in this video and in Cylinder Head 206 should still be performed if you are doing the assembly yourself. Failure to inspect these variables may lead to a tuning nightmare once the engine is back in the car, hard starts, or worse... bent valves and damaged wrist pins.
Making these tools and performing these steps will give you the peace of mind to know with certainty that your engine is operating safely at its peak performance. - ยานยนต์และพาหนะ
7 years later and ur still helping people degree motors thank u sir
I've watched this one a number of times haha maybe I'm a little slower
this is probably one of the coolest things to watch on youtube.
I think most of the diy/automotive/machinist side of YT could take a lesson from your fluid and organized narration. It proves that there is indeed an elegant intersection between being concise, engaging, and vastly informative.
-- and you understand the value of text descriptions too!
Probably one of the most overlooked steps in building motors, especially overhead cam engines.
Thanks for making people more aware of how much variation can be present after machining, before or after reassembly.
Well worth the wait for the video Jafromobile. Thanks for sharing with us. It is greatly appreciated.
Thanks Jafro. I always refer to you when I need a technical explanation. Degreed in the 264/272 I/E Crower cam combo I've got tonight.
Stumbled on these videos and I'm pretty impressed, the way you walk through these is fantastic. There's no guesswork for the viewer on how or why you did any one step, and that's a big part of what separates great teachers and OK teachers. Keep up the great work, I'll be watching some more of these when I find the time
just watched all the videos concerning your hyundai rebuild. These will be reference to me as far as the steps taken, not the actual numbers as im doing a nissan ka24de-t. still tons of great info and very well made videos. i'll be watching for more to come! Thanks for taking the time to make this available for us to watch
Dan
Hey there just stopping by to say Thank you for these amazing videos! Your videos have helped me to fully grasp what it takes to build a motor right and Im using ever piece of knowledge that you share into my 2.4 build! I cannot thank you enough! Your patience and perseverance is outstanding!
Can't say if I am repeating myself but about 5 years back when I was rebuilding the engine of my CRX (D16ZC) you have been the one who got my attention. Even today you r giving us nice insights, tips and good jokes. You brought me into porting the cylinderhead and checking the injectors. And with this video, later on, how to set the cams correctly after the head been surfaced more than 2 times. Heh. Thanks for having u here.
A friend pointed me to your channel, and i'm now coming up for air after immersing myself in untold hours of your videos. I'll probably never touch a 4g63, or any DSM motor, but i thank you for the painstaking detail you put into these videos and facilitating the satisfaction of my inner monologue's "i understand what he just did!" I don't know where i'll fit everything i learned in this video, but i'll make room.
6 + years later and this video is still relevant I appreciate you and thank you
great video, the foreign material stuck to your magnet at 1.35 had me freaking out but i knew you would clean everything up nice like you always do. iv been watching your videos for a good 5 years now and even tho my dsm is gone i credit all my mechanic talent to you and your great attention to detail have stuck with me and every car i ever play with, i rebuilt the motor in my 95 gst way back when and knew exactly how everything worked before i ever tore into it, your videos where the best thing i could have found and i enjoy every last one still to this day. I drive a 07 mazdaspeed 3 now and still miss my dsm maybe one day i will have another. Great job as always Jafro.
jafromobile, I'm in the process of building my 96 GSX with 1g head & your videos are the best informative videos I've seen that deal with the 4G63. keep up the Great work.
Almost 300k hits man. This video has definitely been viewed world wide for improving 4g63 skills and overall education of the engine .
I actually think this particular video was the best work I ever did here. I wish it had half the traction of my port and polish video. The would be filled with DOHC experts! :D
I had to sleep 12 hours for my brain to recover after this video! I can't describe how awesome that feeling is, thanks for sharing all that knowledge so well!
Just found your channel. Watched all of the 4g63 videos from start to finish. Excellent stuff.
Great video as always. I learn something new every time I watch. Caboose cameos are also always appreciated. Thanks!
I always look forward to your videos, they're therapeutic. Thanks for doing what you do.
You sir are my hero. I know it's a long way off, but I'm itchin to hear this thing run. It's going to be EPIC considering all the love and attention you are giving it.
dude your commentary is the best. hands down.
erikmoua Thanks man! It doesn't come easy. I'm a tough viewer to satisfy and it typically gets re-worked for weeks before I'm satisfied with it. I appreciate hearing it!
I know it's an old video but them you are a Master. The way you speak explaining everything it's amazing. I subscribed . Thanks for this class.
This video I think is the best on the net that I found on degreeing cams. Thanks for the information. For the folks that are still confused, sit down, take notes on a piece of paper and put it into your own terms. Rewind the video multiple times until your brain matches what's on your note pad. Luckily for some, he was using a digital gauge and not an analog gauge. :)
cruzancoconut You pegged the only reason I use a digital gauge. ;) Thanks!
Once again youve an incredible contribution to the gearhead community. Thank you!!
And here is a tip from the blacksmith shop if you ever have to cut on sockets again or anything that may be some kind of hardened tool steel. You can get the metal as soft as they it will get by heating it up to dull red or wherever it looses magnetism and then let it cool as slow as possible which usually means dunking them it vermiculite. (Its like kitty litter and found at pet/garden stores)
I prefer the piston stop method myself, but you know your stuff dude. A VERY VERY informative video. You should have your own show, you had my attention the entire time. And I get bored pretty easy man. One of the best car vids Ive ever watched. Thanks man.
I'm that statistic! Hiya! o/
I love watching your videos, and they recently helped a friend of mine. He suddenly lost all power on the road with his Evo IX, assumed the engine was dead, and decided to replace it. I managed to talk him into pulling it and letting me look it over. Thanks to your video's, I diagnosed several problems and rebuilt it for about~$700 bucks ... Saved him 2.5 grand easy, and it runs like a f**king champ! ^_^
You sir, are the Yoda of DSMdom. Your videos are second to none. You inspire me to grow and broaden my knowledge base for something I have a passion for. What you share is invaluable to me personally and for that I would like to say Thank You! I enjoy watching your videos, once, twice and even a third time in hopes of learning a little more each time.
This guy is amazing his videos are insperational and they allow me to keep building my 4g63T
Nice Vid Jafro! Iam glad I didn't add cams in my build as I was unaware of the extra work that went with the cam gears. Looking forward to the next one !
GREAT JOB on speeding things up while explaining your actions! Viewer can easily understand what's going on without taking unnecessary time for the things that can be better shown than explained. As they say, a picture is worth a thousand words. Thanks for the great video!
You know that scene in the matrix where Neo "jacks in" to the chair and learns all of the martial arts?
I always love the videos Jafro, this was a great topic. Don't ever stop!
I like your videos and narration. You sound intelligent and a hard worker. The funny thing is I don't like cars and I always hated working on them.
+kingmike40 Lol! Thank you Mike! I've gotta be honest... to be commenting in this video... you went straight for the hardest and most complicated topic! I can tell you still like a challenge. :)
You did an excellent job, very impressive! I'm not a Hyundai fan by ANY means, but you really did a bang up job and this stuff applies to any engine. Nice job!
You sir are an automotron; one who turns jargon into jargon that is understandable. Tip of the hat to you, very much indeed.
after a few vids in this series you get the sub! love the educational takes !!
Excellent. You did a great job explaining this and keeping is simple, and thankfully no annoying music! YEA!
I wonder what percentage of adjustable cam gears are installed because they look cool and never adjusted. If there is a better source of this quality of automotive know-how, I'm not aware of it.
Thanks for all the time you put in, and of course, your relentless pursuit of audio and video quality. I know it does not come easy.
your videos are right on!! like how you narrate and with precision!
I know this video is old... but you had me rolling with the cam/dog analogy!
when going through my subscriptions i noticed you (jafro) had a number indicative that some action has taken place on your account, as the page was loading i was chanting fast "new vid new vid new vid" followed by a "yay new vid!" needless to say im excited,
Always enjoy your videos and check weekly for a new one. I've learned a lot from you and makes me miss my Plymouth laser
There's a finite lifespan before you can't even find stuff in the junkyard anymore. The Hyunda stuff from '90-'95 for instance... Mitsubishi won't be far behind. If you want one, get one before they're all gone. Responsible people who watch my channel deserve to own them.
This is fcking awesome. We're very lucky to have your wisdom and experience distilled into such easy to digest videos. Thanks.
The next video's even pre-chewed! ;)
***** any word on when the new video will be?
I'm doing my best to try to squeak it out tonight. I'm at the mercy of the export which has been taking about a half a day for a half-hour video. The last export starts at about 1 PM today. So tonight or tomorrow morning, one of the two.
Have learned more about my Talon from you, than everyone else put together. Have had it 17 years now, in the process of building the engine for endurance road racing. Hope all is well and many thanks for these videos and a uor hard work.
Love your vids, something that might help with the tapping would be to heat (with Oxy. Acty. kit) the centre hole of the socket to a Cherry red and let it cool in air, this will relax the grain structure of the hardened metal and save your tap.
best tutorial on how to degree a cam EVER!
Great instruction, commentary, and information. This video is top notch!!
Man this channel is instant subscribe for everyone who seek knowledge
Sweet Caboose action! Such a good cat. Of course the vid itself was fantastic, just a ton of info professionally presented.
Caboose is an amazing cat. You never know what you're going to get, and I got lucky with that big fat-ass crazy Manx. He does most of the dog tricks. He keeps a line of sight on me no matter where I am in my house or in the yard. He's like a Jack Russel terrier.
Yeah, I have a couple of cats and I can take one of them outside with me and he will come when I call... They are a lot more social than people give them credit for.
Use a bicycle wheel spoke to extend a dial gauge! Some of them have the correct thread to screw into the dial gauge and they're straight, cheap and abundant.
Also, the correct thread for most of the dial gauges is M2.5 with 0.45mm pitch.
On another point, I like to measure my TDC using 1mm BTDC and 1mm ATDC of piston lift, as the top dead center is - as the name suggests - a dead center. Depending on the stroke-rod ratio, the piston might seem to stay completely still at TDC for more than 3-4 degrees of crank. I mark the pulley for 1mm BTDC and ATDC and the real TDC is exactly between those two.
Just found your videos. Great content. Very informative and easy to understand
These are the best engine videos on TH-cam, I can't believe the precision you go to with motors. It's unbelievable. Do you ever work on Honda motors?
I did build a Honda once. It was a great car. I actually do miss it after 8 years of $3.50 gas prices, yes I do... I couldn't bond with the Honda performance factor. No offense to Honda owners anywhere... I just wasn't willing to do all the block sleeving and girdle work to stiffen up an aluminum block with a floating water jacket. It cost so much more to achieve the same result. I made a video about it called "Jafro's Honda Civic Confession".
i built engines before but i never went this far with measuring lol but its really interesting thanks for the awesome videos keep it up :)
There was at least 30hp sitting in each one waiting for you to unlock it. ;) I can't wait to see what you build the next time around!
Another great video, always enjoy watching them!
pure bad ass, man the smartest thing I have seen in a long time, pure genius, you showed me a very nice trick , with building the adjustable lifter
There is an easier way to attach a degree wheel: search google image for a degree wheel, print it out, and glue it on to the circumference of the harmonic damper. It takes a bit to ensure it's round and true to center, but mostly free is a great price
How do you only have 120k subscribers? Brilliant stuff
Thank you for making this video. It was really helpful.
i love these vids... i cant wait to apply these proper learnings to my next build
(my current one is sketchy lol)
Just got the notification...yaaaayyy new videos!!!!! Keep it up jafro!!
Amazing my friend thanks for spend your time with US. Complements from Portugal!
Great video matey.. attention to details...very well explain loud n clear👌👍🤙
Excellent video as always.
Thank you for the information... great video
Just saying. You taught me more about engine building than any other person I have ever come across, in person or on the internet. Your videos gave me the confidence to go out and build my own engine (finally... Had the damn thing for years.), and mixing what I already knew about engines and what you show in your videos... I'm proud to say that my little CA18 runs mint, has perfect compression and does what it's suppose to do! So for that, I have to say thank you. Now I just can't wait to build my next ca18 with much larger cam shafts! Keep the videos coming. We can all learn from them! : )
i own a 95 talon tsi fwd auto and i absolutely loveeeee your videos ive watched them all atleast 50 times and i would really like it if you did a review of your tool box / which tools youd recommend absolutely love watching your videos especially for us 4g63t guys
Nice informative & funny video! Thanks bro! We need MORE!
Excellent man, love these vids! Thank you!
Outstanding video as usual. thanks Jafro!
Ugh thus is one more thing i need to do to mirage. I dought ill find specs for a rpw cam for a 4g15. Thanks fir explaning the purpose of degreeing cams.
Excellent video, so much information and so many good tips, love it Jafro :)
You covered it all. Excellent video.
Smashed the like, not only for the excellent content; but that cat RULES
Excellent video! thank you for all the info and tips :)
top video jafro.
I will definately be making my own solid lifters for this, I didn't realize that it was that simple, here I was prepared to buy some. Be looking out for cylinder head 206
You should lookup 4g63 dotorg and read the cam degreeing section. There's a fantastic write-up with yet another method of lifter setups available. It's nice that these lifters are so prevalent in so many different junkyard cars. Every 4-cylinder DOHC 1989-1999 Mitsubishi uses them. Of course there's nothing wrong with the ones CRCO makes if you have the coin. Heck I might even buy a pair just to have them in the toolbox.
***** I am not that far into the build yet my cylinder head is ported and polished and I have all the parts for the head, gaskets and sensors for the engine but am yet to buy a rotating assembly and machine work. This sort of stuff is beyond my experience right now so ill do what I did every other time, watch videos and read manuals then dive in and I will be familiar. I will read this article on 4g63 dotorg thanks. Oh I finally got mitsubishi ASA on my computer so part numbers are a breeze. Keep it up jafro.
God I remember doing this to my cortina mk2 GT, I fitted a kentcam bcf3, it was a little more easier in that engine (kent crossflow) because it was a single camshaft but it was a ohv so the cam was in the block. But I had the head ported and gas flowed,, fitted 1300gt pistons in a 1600 gt block (higher compression), I also fitted vandervell bigs and mains shells and knocked to the oil pressure to 60psi plus fitted a full janspeed exhaust system inc manifold. I left it with the standard webber carb DGAV32. i did take it down the motorway and 0-60 was around 7secs and the speedo was off the clock around 120mph. This was all done around 40 years ago when i was in my teens. I beat so many cars away from the lights even the souped-up ones. The fact was I had done all the work properly and did not just bolt on after market accessories; Those was the days!!!!
Awesome channel! Really cool videos. Keep it up
Lol I'd watch Cylinder Head 206 if it was out yet! One of the best engine timing videos I've seen
Thanks man! The good news is that I had to split this video in half and only upload half of it. I'm re-working the audio track and it will be here very soon. Hopefully before the end of the week!
***** That's great to hear! Looking forward to it
Wow! So much info! You are a dsm god! Thank you for the vids.
great video, lots of good info as always!!!
If I may, an old school hot roddding tip for cam tuning. The motor will respond the best when you achieve the highest cranking pressure by changing valve timing events. A lot of trial and error, but I always had more time than money.
Learned a lot again, thanks!
you made me feel like knowing so little of an engine... nice video!
This is cylinder head 205. It started with 101. ;)
i used to race with 4G93 and 4G63.. but always salute to professional mechanics like u guys that really patient and detail with no compromise... :)
just discovered your channel, interesting. thanks
YEA!! Video!! Great work as usual. I am not sure what is more impressive, that you take the time to voice over and edit down that many hours of footage or that you actually trained a cat. The fact that you somehow did both... so how long have you been single?
Hahah... 42 years and 2 weeks.
Caboose was an easy one, and Manxes usually are because of the mutant gene. But I've got a female manx that's dumber than a bag of hammers, so that doesn't seem to help them every time. She hides all day, and that's why you haven't seen her. She's the only one I've ever had that I've never been able to train.
I learned training a cat is more about training ME to figure out what they want rather than me actually teaching them anything. If the cat is easy to read, it's easy. I just mess with them constantly before giving them what they want and it makes them forget they're cats. Every time they cooperate, I give them what they want. They already know how to do these tricks instinctively if you keep them happy, and usually don't realize they're participating in a game once they trust you.
Amazing vid thank you jafro you're the man ...numero uno!!
I'm the gal. Love your videos :-)
Connie Campbell See, I knew it! Welcome aboard! :)
With me you just doubled your female viewers lol
ค
Purple heart ...your a legend. Again thank you for sharing and God bless.xo
Bro impressive as usual you are the men looking forward for next vid that Hyundai gone have a real blue printed moto r in it
I learned so much from this video. Thank you! But the most important thing I learned was that "installing camshafts is a lot like a dog pooing on your rug."
Engine building and cat, I love them both.You show what the paper said and what is real life do, So can you tell how to correct and choose piston rings gap please?
Wow" I just discovered your channel! Awesome! You are a genius! :D
Thank you for the great videos!
Did you make the top dead center locator (threaded with spring) or did you purchase it? If you purchased it, could you tell us where to buy one?
what is the difference in usage of an underdrive and harmonic pulleys, and which one would be perfect for street and strip?
Dogs poop on carpets... thats all i got out of this.
Nah, great video, been watching from 202 up to this one now, strangely addicting to watch how you do it as you tell why it works and how it works.
Thank you for making this great video series!
Good job here! Where can i buy the dead center locator with the spring that you use together with the comparator to find out tdc?
It took me 31:49mins to watching the video，you are
genius！
like the way you explain process very educating videos.. like your cat too
By far the hardest part of degreeing cams is trying to get the damn indicator in the right place in the cam follower.
Hey Jafro. Caboose looks jus like my family cat kitters we had for 19 years!
Excellent vid, thanks.
Great job on the videos. I just discovered your channel and I am making my way through them all. It is all very good stuff worth my time. I do have a couple of concerns I thought I would pass along. First I caution you against side loading the grinding stones on your bench grinder. Only the face is designed for grinding. It can come apart and fatally injure you. I am sure TH-cam is full of horrific videos detailing the aftermath. Second, do not use your bench grinder for aluminum. The stone is not designed for aluminum and can load up, become unbalanced and come apart, again fatally injuring you.
I remember my cousin putting dohc heads on a 400. grinding the block, drilling and tapping holes, running a timing belt, plugging up countless of the previous timing holes, and shortly there after ruining 1800 dollars worth of top and bottom end. I also remember the day he got it right.... 9800 rpms and 630 ponies at the flywheel. His garage walls were floor to ceiling in math. Now it sits in a Catalina in Florida, Waiting to become scrap.