Cylinder Head 205 - Degree DOHC Camshafts
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- Опубликовано: 6 сен 2024
- 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.
![3 Easy Techniques to Find TDC | Cam Degreeing [#FREELESSON]](http://i.ytimg.com/vi/hh4XxSmLBoA/mqdefault.jpg)
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
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!
this is probably one of the coolest things to watch on youtube.
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.
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!
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.
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!
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
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.
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.
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!
6 + years later and this video is still relevant I appreciate you and thank you
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
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.
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!
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)
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?
You sir are an automotron; one who turns jargon into jargon that is understandable. Tip of the hat to you, very much indeed.
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! ^_^
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.
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.
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. :)
I know this video is old... but you had me rolling with the cam/dog analogy!
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.
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.
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!!!!
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.
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
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 the gal. Love your videos :-)
Connie Campbell See, I knew it! Welcome aboard! :)
With me you just doubled your female viewers lol
ค
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.
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.
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.
Man this channel is instant subscribe for everyone who seek knowledge
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
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.
By far the hardest part of degreeing cams is trying to get the damn indicator in the right place in the cam follower.
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
I'm officially intimidated now. I replaced the head, springs and valve stems and now it needs to be timed.... I have a 1.6l dohc engine from my 02 accent and I know not all engines are created equal but, at least this video gave me an insight on what I'm up against.
This guy is amazing his videos are insperational and they allow me to keep building my 4g63T
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.
best tutorial on how to degree a cam EVER!
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.
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.
Why is this guy slept on?! Only 100k subs🤷🏽♂️
Most people like lambos, stuff blowing up, video games, vlogs spending money on mystery boxes, etc. This is educational and that is why I subbed. I really enjoy this form of content
Just found your channel. Watched all of the 4g63 videos from start to finish. Excellent stuff.
after a few vids in this series you get the sub! love the educational takes !!
the block mating surface seems too much scratched...also what is the importance of new dowell pins??new cylinder head fasteners are much more important and worth mentioning. anyway great video and cheers
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 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."
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.
I thought I wanted new cams before I watched this video. Now I realize I have no idea how to keep my dog from pooping on my carpet.
One question. You didn't tighend the head. Because the cams are now "higher" above the crank than in the future, will this effect the cam timing?
One tip that I found on RUclips finding TDC more accurate. Because the moving near tdc is so small, you can go the same high/reading on both sides, than in the middle of these degrees is the TDC.
And another Tip. You can find pdf's of degreeing wheels on the internet. I have printed them out and glue them on plywood or acrylic. Of course you have the same mounting problems.
Great video as always. I learn something new every time I watch. Caboose cameos are also always appreciated. Thanks!
These are the best engine videos on RUclips, 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".
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.
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
I always look forward to your videos, they're therapeutic. Thanks for doing what you do.
Excellent. You did a great job explaining this and keeping is simple, and thankfully no annoying music! YEA!
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!
Your comment about reusing the old dowel pins if the block and head haven't changed… if you get time would you mind elaborating on that?
Would you say that a resurface job on the block and head would be enough change to suggest using a new set of dowel pins?
P.S. Ive done this entire process by watching and learning from your videos, i absolutely appreciate every last minute you spend preparing these documentaries for the community!!!
Cant wait to get her finished up and one day im gonna meet you at the shootout and shake your hand!
-Brian
How do you only have 120k subscribers? Brilliant stuff
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?
Jafro, using a dial indicator with a round tip on a thread is a bad idea. You can unscrew the tip, than have the flat end to use instead of the round tip.
I know you acknowledged this in the video about the round tip on threads but I thought I'd just point this out.
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 !
It took me 31:49mins to watching the video，you are
genius！
I just got brained screwed!!! lol I don't think im ready said the young prom date said, this video was a little advanced for the likes of me. But I tried to understand most of what you did and said got a little lost, but never the less the video was very educational very interesting and im very thankful so thanks jafro keep them coming
Don't worry, valve timing gets explained better in the videos that follow. This video will make more sense afterwards if you still have grey areas. I think I'm going to make some animations to illustrate my points in it. If you had to set the valve timing on your own engine, you'd figure this out in a heartbeat. ;)
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,
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!
Just found your videos. Great content. Very informative and easy to understand
Why didn't you just bleed down the lash adjusters and shim them to make solid?
Great instruction, commentary, and information. This video is top notch!!
How do you know where zero is on the degree wheel is, with the piece of romex? How is that determined?
Is this something i need to worry about if I'm replacing a cylinder head with an all stock, re-manufactured cylinder head? I don't have adjustable cams or anything like that, (its actually CVVT).
I'm replacing the cylinder head because the timing belt went out, while going down the highway. I purchased a remanufactured head on ebay, which is supposed to be all ready to go. Including valve clearance if all stock set up?
I love you narrations and explanations by the way. :) I never realized how much work went into building an engine.
+joel reindel As long as your build is an all-stock daily driver, you should be fine. The only tricky thing is on some variable valve timing engines, the cams may have some kind of hydraulic control to adjust the valve timing that can make re-assembly a royal pain in the ass. Most modern designs aren't bad, but engines like the 4-banger in the Ford Probe and the Mercury Mistake... I mean Mistique... have a stupid intake cam gear that makes timing them nearly impossible because it rotates almost 15° in either direction, and the cams don't have dowel pins to help you line it up at true TDC. On that particular POS engine, if you don't get the cam within 3° total of zero... meaning 1.5° in either direction, the ignition won't fire. I doubt your re-manufactured head or engine is as tedious as this, or that whatever work was done to it would affect your cam timing enough to make it un-driveable... but barring that on a stock build, it should be completely fine.
I was thinking your answer would sound something like that. All stock daily driver it is.
It is a 2008 Hyundai Accent. The CVVT device is a real sinch. It bolts on to the end of the exhaust cam, and is hydraulically fed through a hole in that cam. So its bolt and go.
Thanks for the reply. I appreciate it.
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.
your videos are right on!! like how you narrate and with precision!
what is the difference in usage of an underdrive and harmonic pulleys, and which one would be perfect for street and strip?
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... :)
Jafro you're my hero. Seriously, i wonder who's your's.
I'm from Spain and i wan't to study in the states. Where can you recommend me to go? Thanks you for every video you upload. It's awesome to see you go at everything so methodically step by step. I admire you a lot. Thanks again.
Thank you for that, and I'll do my best to type my longest answer ever.
My heroes are Henry Ford, Thomas Edison, and Harvey S. Firestone. Not so much for building an automotive empire that saved the US Economy and who all helped pull us out of the Great Depression... but for their inspiration and belief in people, and in ideas. It wasn't their products that changed a nation. It was how they all looked out for their fellow man, and in very different ways. Look up some of their quotes. No, I'm serious. Look them up. They empowered the poor and middle class. It wasn't politically motivated, either. They were just a couple of industrial capitalists with big ideas who were best friends, and who invested in people. They rewarded all those willing to do hard work, and thought BIG! THAT is what made them brilliant businessmen and what ultimately lead to their gigantic successes.
Harvey figured out how to mass produce rubber tires and market them to the world... SO WE COULD RACE. As a pet project, he bankrolled the founding of Alcoholics Anonymous which has saved or prolonged the lives of hundreds of millions of people from suffering since 1935, and he's the reason its headquarters are in Akron, OH on donated property. He did it as a thank-you because the 2 guys with the _IDEA_ of a 12-step program delivered him a sober son. True story, look up "Bud Firestone" and "The Oxford Group Connection". Harvey wanted to promote Dr. Bob and Bill W.'s IDEA which at the time was the only solution anyone had ever developed that could deal with alcoholism. Doctors during that era were helpless and offered no solutions. People *often* died from detoxification treatments at the hands of medical professionals, so there was never prior to then, ANY hope for people who suffered from addiction. AA's 12 step program is still to this day mankind's most successful means ever developed that treats any addiction to anything. Every kind of addiction uses the same 12 step program. Modern doctors still rely on it because it still has the highest success rate. It has helped hundreds of millions of people world-wide with alcoholism, drug abuse, gambling, sex addiction and even enabling since it was first promoted. I'd call that a successful idea. There are several other reasons I respect this guy that I will leave un-spoken that have nothing to do with tires or AA.
Ford was the first industrialist to let black people work in manufacturing. Of course it was always the right thing to do for humanity, and Ford did a great job despite the already-existing racial tension and the ultra-left leaning manufacturing unions who would stop at nothing to keep American society segregated. Things really boiled to a head in the early '40's when WW II manufacturing moved there to be closer to the auto industry's supply chain and materials, bringing a massive influx of black people looking for jobs. The armories looked to Henry Ford as an example to create desegregated factories, but they implemented it ALL WRONG because they didn't treat their workers equally like Ford did. After all the race riots, bloodshed and putting out all the fires that resulted from their un-kept promises about working conditions and housing, it set an example that became a turning point for America. Those incidents were the beginning of the civil rights movement that lead to equality for all of us. Henry Ford was a civil rights pioneer for all people, and one that he is seldom recognized for. Probably a few hurt feelings over that whole Detroit burning thing... It's strange how history gets re-written to demonize or ignore rich white capitalists who made a difference to people of color, isn't it?
Edison helped Ford figure out how to wire up his inventions and turn them into useful products that anyone with a job could afford. That empowered working people from any and every social class to RACE, BECAUSE THAT'S WHAT CARS ARE SUPPOSED TO REALLY BE MADE FOR. Naturally, I'd like a guy like that. He also helped light up a nation in [all of] his spare time. That deserves some merit as well. If you happen to ever make it to clearwater florida, visit the Edison museum and spend some time thinking about the significance of the 1929 Model A that sits in the driveway... what really went into making that thing even possible... and then what resulted from it. Millions of those things were built, but that one... which was a gift to Edison... THAT one is the most symbolic American car on our soil. A close runner-up is the first Shelby Cobra prototype, but to me, that Model A is beautiful.
These three industrialists were HUGE philanthropists who changed the world. They were friends and neighbors who cared about PEOPLE. A whole lot of $#!†'s changed here over the past 90 years, and right now, more than ever, the world could use a few more people like them. I wish these heroes would step up to the plate because aside from our men and women in uniform, America is all out of them right now. I'd settle for thousands of hero apprentices rather than one big one.
I don't know what it is exactly that you're studying? I will say this, though... Don't let what you're studying influence where life takes you. Figure out what you want to do first, and then study where you will develop the best IDEAS and help you make connections necessary to get you where you want to be. A quality education is useless without ideas. If you _already_ possess creative thought, then you already have everything it takes to be successful in life. ALL the education will ever do is open doors for you, and to help you develop and reach your full potential. An education is completely worthless without ideas. *Feed your creative process.*
I have an un-finished Bachelor of Science in chemical engineering. How that turned into 10 years of advertising experience, a senior Information Systems technology career for higher education, and wrenching on turbo imports on RUclips in my spare time is beyond my comprehension?... but here I am!
I'm pretty sure that this is not the answer you were expecting. ;)
Nope, i didn't. But i'm glad and honored by such a complete and thorough answer. Really, thanx for this. You are someone i respect a lot and to get this type of feedback from you is a privilege for me. I'll read you'r answer in much more occasions.
The way you work and write is an example. Best regards Jafro.
***** Hey Jafro, let me just say that I am also very thankful for all the hard work you do on putting these glorious pieces of engineering back on the road, as well as offering us a very detailed close-up of the whole process.
I am in a similar boat as ClickZen here. However, I do know where and what I'm going to study. I'm starting a bachelor's degree in Motorsport Technology in England this year, and I'm very excited and enthused for starting this course. Hopefully I'll learn relevant stuff which will allow me to go on and do similar work as you, applying all that knowledge and using my two hands to make ordinary cars into extraordinary racing beasts. To be someone called Frank, the sheer amount of information and all the details in some of your videos are at times intimidating. Just earlier I was in the garage checking the timing belt on my non turbo 4g63 2G Eclipse (European version), and I thought to myself "I aughtta change that soon". However having just watched your video (and a few other retro vids on how to change timing belts on 1Gs), along with the fact that I have absolutely 0 proper tools and previous experience to do this, I don't think I'll be changing my own belt anytime soon.
So far the only things I've done are change two footwell light bulbs, tighten my E-brake, fix my rear hatch keylock and paint the lettering on my tires. All those were really fun to do, though, so I'm pretty happy with my progress. Hopefully I can get into a shop after I graduate and start learning some more technical know-how, as I am very eager to start wrenching on this. I'll try to preserve my DSM in the meanwhile, as I have great plans for it, albeit with it's lack of a turbo and AWD.
Aaaand it seems I've also popped a fairly long response. I do like reading long posts, haha! Well that's pretty much it. I would like to hear what you think about all this, if you have the spare time to post back.
Keep up the good work, you really seem to enjoy it, as I sure as hell do!
-Kryndon
DUDE - Reading that post has me sat here grinning ear to ear. Keep being awesome.
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!
Can't. Stop. Watching. Jafro.
I always love the videos Jafro, this was a great topic. Don't ever stop!
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 RUclips 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.
Thank you for the information... great video
Would taking a performance course give me the know how to build motors on my own or should i take mechanics first?
Smashed the like, not only for the excellent content; but that cat RULES
I don't envy DOHC engines.
That's a lot of work.
One thing they offer that you can't get with a pushrod motor is adjustable Lobe Separation Angles. You can still adjust the LSA on a pushrod motor, but the amount of work involved is VERY different. You know what I'm sayin'... ;P Yes, I know you do. :) You have to know a LOT more about valve timing in order to get a pushrod motor right.
***** All did was bolt up the cam and line up the dots.
Took like 10min.
Oh yeah, I know. They are easy to install. It's because the intake and exhaust profiles are all on the same stick.
With DOHC, you get infinite control of how far apart you want your cam centerline specs, and you can do it with both cams installed. The distance between centerlines is a value called Lobe Separation Angle. Pushrod motors have LSA built into the bump stick, so it's a static value that you can't change without replacing the cam. In other words, on a pushrod motor, you have to know and have calculated the perfect cam grind in order to get the most out of your build prior to purchasing your camshaft because the overlap and lobe separation angle values are built in to the cam and can not be changed. They're easier to install, but they're harder to get perfect because it requires a greater understanding of how valve timing events work.
On a DOHC, you can turn one cam independently of the other and dial in the overlap and lobe separation angles just where you need them for maximum performance. So you can purchase a camshaft that's close to what you want, and make it perfect during install. Overlap will determine how lumpy the idle is, and LSA will affect how it behaves across the whole power band.
You bring up extremely valid points, but we'll expand more on valve timing in the next video. DOHC is more troublesome to install, but offers far more tuning capability. I hope this makes sense. ;)
Hey Jafro, I have a project I'm preparing to get started with. It's a 1.4 liter OHC Opel engine, and it's currently installed on my little bite sized truck.
This engine comes stock with a 12.3 compression ratio, so I don't plan on changing stroke or bore. I also want to keep it naturally aspirated, my main goal is to improve efficiency and/or power-to-weight ratio without changing the capacity.
I'm wondering if you have any advice on how a valve/porting job on a 2 valve per cylinder OHC differs, if at all, from a 4 valve per cylinder DOHC.
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
You covered it all. Excellent video.
Seriously hungry for more, i feel ive watched every single video bar a few car shows and track clips. Dont make us wait another month for 206 haha I rebuilt my nissan patrol l28 with the service manual and your guidance. I was also lucky enough to aquire a mitsa magna tf and was pleasantly surprised to find I have the same engine youve been show casing. Its a 4g64 16v, I havent started tearing into it but I feel pretty confident now. It cant be too far off from the 63, right? :p thanks for putting so much time, effort and money into these videos
Oh wow! You got the Galant Wagon. It's mostly the same... Just a different timing belt and a different bore and stroke... but yes! You will find that all of this stuff applies. You should still follow the Magna's service manual for spec, or the overhaul section of the Mitsubishi shop manual for the 2.4L if you can't find the Magna manual.
***** yea brother in aussie we call em magnas.. I wish I had a good website or forum to gather knowledge and learn which mitsas I can use as doner cars. I like the 4g64, for a 4 cylinder it goes like stink I just wanna get more haha it uses slight oil, but not enough to produce smoke. also removing the oil cap you can feel massive blowby which is taking its toll on the spark well seals.. good times!!
That thing you call "1/2" drill" is what we call a "Hand held 1/2" lathe" ;-)
Nice informative & funny video! Thanks bro! We need MORE!
Jafromobile I have a 2000 mitsibishi eclipse gt. I did the timinjg belt...as I was doing the timing belt and aligning the marks I noticed play by 2 teeth on the right Cam. I can basically turn it freely by hand. Would you say it a loose cam gear or the inside that connects to the cam gear is loose..?...
Can you time DOHC cams 360 degrees out by measuring tops/nose of cam lobes as they are 180 degrees away from cam followers?
Sort of. Measuring it that way would be nearly impossible, though. You'd just time your valve opening and closing events off Cylinder #4 because it's 180° out. You would never want your valve timing to be 360° out because it would be out-of-phase with your injector pulse and valve timing events. Your valve events would be 4-2-1-3 and your fuel injection would be all like... 1-3-4-2. Your ignition won't care because it will be all like "Yo, I'm a waste spark system, so 1&4 fire at the same time every time, and so do 2&3.
+Sweeper Tube Your replies are disabled. It's Summit Racing part number IPA-7880.
Thank you. What about dial indicator?
You're a beast...... Your name should be Dr. Banner
What would happen if you did not change out your valve spring for the weaker springs when degreeing the cams?
+j Shafer You would be unable to press the valve down by hand to measure the valve drop at that particular degree of crank rotation. That's where you measure your valve clearance. You don't need test springs to degree the cams, just to test the valve clearance. If the engine you're degreeing isn't an interference engine, you never need to use a test spring.
Dang that block is legit I wonder if it would help to have a paper oil housing gasket on the timing side
Just wondering ⚖ 😳
20:52 "the factory service manual says you need to turn the engine shaft 2 times clockwise". This is just to make sure that the both camshafts are aligned to the main crankshaft. If you can run the shaft 2 rotations this make sure that there wont be any impact of the valves to the pistons. That's it. You say oil will flow to pass valves.... ?!? do you think that the torque you provided is enough to power the oil pump ?
It's not oil past the valves... it's oil past the CHECK valves in the lifters. If a lifter is inflated, it is applying a greater spring pressure to the cam lobe rockers->cam lobes->cam gears and thus the timing belt. The Factory Service Manual does not specify why you have to WAIT 15 minutes before checking/pulling the tensioner pin. If you've got the TENSION on the belt set wrong, then the pin won't spin freely... however, a fully-inflated oil-filled lifter is enough to apply enough pressure to the cam gears to make the belt too tight to spin the pin. That is why you have to WAIT 15 minutes to let that bleed down. If you soaked your lifters in oil, that's all it takes to have this condition happen during assembly.
So no... The torque I provided will have no affect on a dry oil pump. All of this is for the sake of the LIFTERS.
if i dont have the cam specs. how i know the cam opening and close degrees ?