Not Another Valve Job!
ฝัง
- เผยแพร่เมื่อ 31 พ.ค. 2021
- In this episode I install brand new valves into an existing valve seat. If this is the fix you're trying to do, this is everything you need to check, and how to get this job to go your way. Adding only an intermediate expense of tooling to check your work is how you can chase down and pinpoint the tiniest of leaks in your valvetrain, or discover problems that would reveal you're wasting your investment of time and energy. This extra time and attention to detail can make a dramatic impact on the overall performance and longevity of the part.
Here's a video of an actual valve job being performed by a machinist. He demonstrates how he compensates for the imperfect world we live in with his machine setup and Bob Ross'd it:
• Cylinder Head 201 - Ra...
If you plan to clean up and re-use your old original parts, go watch Valve Job Basics. It covers all of that stuff that I don't have to do here. I pick on it in this video, but really, I love it. It's a good video.:
• Cylinder Head 105 - Va...
You need a valve job if:
• you can't meet the valve or seat contact specifications in your service manual
• you have bad valve guides
• you have bad valve seats
• your valves land crooked on the seats, or don't seal.
Nothing I do in this video will fix these issues, it will only reveal them in extreme detail. You will have no question. If any of these things happen on your part, it needs a valve job. And if you need to replace valve guides, include the cost of the valve job, too. This is how I get the most if there's a seat left to work with.
The tools used here to test both the guides and to vacuum test the head ports combined would be between $100-$400 depending on whether you make them yourself or buy a package kit deal that comes with everything you need plus some sort of vacuum pump. So that tool estimate assumes that you already own tools like an air compressor and have a set of micrometers available to you. You can pay however much you want, for tools, but you can see here what works, when you need expensive tools, and when you don't.
The JB Industries Platinum 7cfm vacuum pump alone in this video is a $600 pump all by itself. And you can see just how unnecessary it is for this kind of work. The example it provides you with here is priceless, though; just like the cheap little $20 Venturi that ends up being the perfect tool for this job. Just make sure your compressor can keep up with its demands of the Venturi, and suddenly it becomes really easy to hit the low end of that tool investment scale. 30-gallon or bigger usually can. Needs a 4.2 cfm recovery rate to keep up with it. Just saying.
The results on the vacuum gauge demonstrate what level of perfection is easily achieved with a meager tool investment, and a basic understanding of the process. I showed you how to chase the leaks, but I didn't need to show you me doing that on the whole head and then cleaning it back up again. A little extra tooling combined with the persistence and sweat equity from the mechanic can go a really long way in the finished product Once this skill or knowledge of the tool is acquired, you can achieve the best possible results for a lifetime whenever all other factors are correct. I felt it was necessary to point out how the vacuum sources are related to the test. All you need is a cheap AC hose, and some 3/16" sized barb fittings, A 1/4" NPT tee block, a cheap vacuum gauge, a set of port testing pads and some Teflon tape. You can buy these hand-crafted hand-pumped vacuum kits on eBay that come with almost everything you need in exchange for a little extra cash... you can buy just the vacuum plate kit by itself, you can make one yourself... I wanted you to understand where it all fits in. 23" of mercury on the hand pump isn't 23" of mercury on the Venturi or the air compressor. It still works. And you should still try to hit 23" of mercury on that thing, you'll do the best valve work of anyone around you.
Sometimes we get lucky. This is one lucky Galant VR-4.
Here's a place where you can make a direct impact on my production. One that could become life-changing for me. I don't have any perks in place yet beyond early access to new uploads, and your names in the credits, but it's coming. The one thing we're always trying to save that's always getting away... You can sponsor my work, these projects, and all the tools I get to do it with by visiting me at / jafromobile . I owe everything about my current capabilities to those incredible people.
Now go do great things! Save these old gas burners. We're going to need them some day! - ยานยนต์และพาหนะ
![ตัวอย่างภาพยนตร์ Venom: The Last Dance [Official - Sub Thai]](http://i.ytimg.com/vi/DHPjvAwmnRE/mqdefault.jpg)
today July 18 2023 saw your face for the first time in nearly 10 years of watching your videos. ty for that!
"everyone quiet down! 4g63 class is now in session!"
I know right? Things we actually want to learn from someone how knows what to do.
"these things make precision guestimates"
i'm dead. jafro wins.
Fantastic, thorough work and expert explanation. Thank you Jafro!
You reminded me of a thing... You are the man, man!
Hey I was just rewatching all your Street Sleeper vids, great stuff!
Miss your vids TT. Here’s to the classics! Some of the best builds on all of TH-cam.
Collaboration between Tom n Jafro?!!! What a wonderful idea!!
@@kenxiong6830 "Jafro gives Tom head......s for his LS Miata"
I think my favorite thing about Jafro is that he will do something to prove a point on camera solely to educate the masses, he already knows what the outcome is going to be but does it anyway to give an exact example of why he's going to do the repair that he's going to do so people can not only follow his logic but also develop logical problem solving skills themselves. What a beautiful human.
Jafro uploaded! Today's Patreon was a good day.
"This is just like a leak down test except that it's the exact opposite..." Hahaha love it. What do you mean I took that out of context? Excellent video as always. Making me want to dig into an engine that doesn't even need it.
P.S. Just a thought and hope you don't mind my over participation in your comment section. Could you use a shop vac to pull the vacuum you need? Would be pretty simple to rig up a seal for the hose and attach it to that same gauge. A quick search seems to imply they simply won't pull enough vacuum, ironically.
I get it! I want to do it to the Hyundai now.
Yeah, they're low-pressure. Comments are for discussions. Be my guest!
I had a good laugh at the "pop" the suction cup made during the no voiceover section.
It's such a satisfying pop! There's a lot of satisfying things about taking the time to do this job right. It makes all the little sounds and messes you create doing it a little bit endearing. The vacuum tester does a great one, too!
40:00 beard game looking STRONG : D This video was killer, keep 'em coming : D
Right??!!
Hahaha I thought the same.
4g63 Gandolph needs one.
I actually love that you talk through the entire video. There's plenty of guys on here that don't say anything in an entire video and that gets old and is harder to follow. You're very unique!
Jafro, I just want to say thank you so much for these videos. I changed my first DSM clutch with your help like a decade ago. I learned to tune from your videos, timing, cam swaps, so many car related things I’ve managed to do, I can directly credit your clear, detailed explanations. I am just about to slap the head on my first engine build, a forged internal 7 bolt, and again, your videos took all the guesswork and worry out of it. Thanks a million, some day I’d like to shake your hand. One thing, though... can I convince you to daily a 2009 Hyundai Azera LTD so I can figure out how to make my accessory fan work again?
awesome vid. also gave the hand vac pump a reason to exist.
Everyone is entitled to complain about them, but you can't argue with the results they can produce!
"Hit that like button if I should SHUT UP more often"
So does that mean I am supposed to hit dislike if I want you to keep talking?
No, but in all honesty, I am a car mechanic in training, and I am learning more in your videos than I ever have in school the past two years. So by all means, KEEP TALKING! ;P
Those fractions on the feelers are genuinely amusing as an Aussie lol equally confusing too!
I want a set of wrenches on those sizes!
Most comprehensive & informative video on valve lapping issue.
Thank you.
Great channel and I don’t even own a dsm or a 4 cylinder for that matter.
Checking in from short pump.
RVA in the hizzy! The good news is all of this works on everything but a Tesla!
47mins, WE LEARNIN AGAIN BOYS.
The reward is big for those who make it to the end. I'm Jafro, and this is my MasterClass.
Jafro, Have you considered a video on lapping valves?
Could be a false memory but I recall a early video of him lapping valves manually.
Lol
@@yankumarrah Wait, yes, now I remember... but wasn't he using a 1/2 inch drill in that one?
Being able to watch Fuzzy Dice Projects valve lapping job, followed by Jafro's a few days later; is the miracle of TH-cam!
Both enjoyable videos, for very different projects and builders!
Jafro: "you really shouldn't lap a valve for anything other than checking the valve seals"
FDP: "lapping drill go brrrrr"
38:03 Nice penus pump you have there Jafro. Thanks for the content.Keep the good work !
I like how the digital calipers & dykem magicly moved themselves while you were cleaning the bench around 42:55..I had to watch that part again to make sure I saw what I saw.. Thanks for another informative video..
"My Precision estimating tool" Jafro BUD you are hilarious! please never quit the tube. Literally would be the saddest day in history.
We need to get jafro over 1m subs! All in hopes to see more videos like this more often 😁
I like your thinking!
@@Jafromobile you should do a collab with some other 4G guys. There's so many damn combinations of 4G Frankenstein fuckery you can build lol.
Great video! I had to wait quite a few days to watch this, as I had the minor matter of my first child being born the day you uploaded. He’s sitting on my lap very calmly taking everything in, and, if he’s anything like his dad, he’ll be a huge Jafro fan as well. Thanks again for the content.
Wow Jafro thats why i follow u for years its so amazing how u teach men thank u for another great video
Totally chill performance as always - TY for sharing. :)
I learn more from you , than what i did in 20 years of school. do not quit !
Only thing left is to check the installation height and coil bind. I am glad that the replacement head was in such good condition. Money saved paid for the tools and that is always a win win.
Another great video it’s therapeutic to watch this keep them up 👍
The best video on this process. Thank you!
hello, it was a nice video, thank you, thank you. I have been busy with this job for 30 years, now technology has developed a lot in this field.
Good timing Jafro, I have to inspect some heads soon. Never really knew how to inspect the guides, and here we are. Just bought some Mitutoyo small bore gauges surprisingly cheap on the flea bay.
Man that was awesome, thank you so much. That really explains a lot past just the motions of going through it. All the context and addendums are so appreciated, and I can't say the humor isn't a good addition 😂
Watching this after Fuzzydice projects "Valve Job" is therapeutic :P
Jafro does it right, Fuzzy does it as good as it gets while being cheap. Takes almost as much knowledge to do it cheap and good enough as it does to do it right.
@@NuclearHeadshot No, I do it cheap, too! The Hyundai's here for contrast. ;)
I think I almost cried watching the fuzzy dice video on the valves. As soon as a drill was involved I knew it wouldn't end well, little did I know how bad it would be
I love your videos, they're terrific! I could listen to you for hours...
great info!! consider a homemade fixture to check for valve face runout, small v-blocks with a dial indicator.
Jafro your the man. No other channel out there like yours bud. 👌. I love it.
Hell yeah, this makes my evening! Beats Netflix! Jafro and Chill...
my car is in the shop getting 2 new valves i can only hope the man doing the job is as pr0 as you, thank you for the video! It was great
Saw the original non valve job, also excellent, explanatory. And hilarious. Subbed
LoL, I love your channel man. The first time I needed a vacuum source I skipped the hand pump and went for the Venturi pump, this vid proves I made the right choice. BTW, IMO the hand vacuum pump is useful for the brake system, for everything else it’s simply inadequate.
Also it’s so refreshing to see another one of these videos! I was looking up ways to tip valves at home, but I’ve come up with attaching a V-block to my bench grinder after dressing the stone I’ll be using. If you have any tips for tipping my valves at home, please let me know!
Jafro is the MAN! Great video and explanation.
you are never better served than by yourself, thank you for this precise and very informative presentation and de 2 minutes of shut up silence ;-) Cheers from Geneva Switzerland
I always learn something watching your videos
Tons of information, thank you.
I’m sorry I got here late. Work then had to get milk. Since the last video I got a new Subaru wrx. Premium performance pack, the one with the brembos. Sorry if no one cares but I needed to tell people, I’m so hyped!
Also
JAFRO!!!!!!
I think you did a good job on this one and some peeps will learn from it.
Jafro you sir are a rock star!👍🏼👍🏼
Must be Christmas, thanks for another great video!
I’m not sure there’s a sound more satisfying than hearing a well seated valve hit its seat.
just love the detail of the sound change whyle laping the intake valves, if you are doing that with some kind of electric thing you cant listen to that! Like!
Use your right hand to hold the mics by wrapping your pinky around the horse shoe. Then your left hand is free to hold the part.
Great helpful video, and really good voiceover too.
I'm in the process of rebuilding a similar Nissan CA18DET cylinder head and modifying it for better gasflow. I've got a very good idea of what needs doing but I've never done this before and your video gave me a good idea for testing the valve guides and seats.
I have to say, those Mitsubishi port bowls are horrible for the era, a little time with some 120-grit sand paper would improve them and cylinder-filling enormously. Some of the lumps in the combustion chamber are also shocking, a hammer and chisel might be suitable!
Prussian blue is used in _very_ thin laters to show where contact is happening between faces. It can be used to create precision flat surfaces within tenths, but it's rather finnicky to use.
Very good point with the cheap digital calipers, I use a set of Fowler digital calipers around my shop only for rough checks just as you do the harbor freight jobbies. I'm a machinist so have plenty of higher quality measuring equipment for QC. Not all digital tools are created equal, I'm a big fan of Mitutoyo Quantumikes. The big difference is, of course, cost! You get what you pay for never holds so true as when you're dealing with precision measuring equipment.
I've previously made a Vacuum Tester with an AC manifold gauge set, AC Vacuum Pump, used the rubber from a suction cup with a threaded fitting in the center. Works likes a charm. I was to cheap to buy the adapter plates on the fleabay for $150.
I did the same - used a piece of rigid vinyl flooring with a rubber backing cut to size and tapped hole through it to add the suction hose. super effective. Calmed my worries that my lapping wasn't u to snuff.
Uh oh im late... im still here!!! Love the content Jafro!
we need more of your videos please sir
I skipped ahead. Love your chaos. Tis is exactly as it should be.
Have hit the like button though, as I love your vids. Keep it up!
This conclusion makes sense in my mind too...
Great video, thanks very much.
subbed! thanks Jafromobile , repurposing a tool (hose kit) : priceless : ) Be Blessed!
Thanks so much Jafro :P
this Jafromobile relationship on TH-cam started over a bleeping port and polish on a cylinder head... how long has it been? 4 years?
The real deal, thank you for your authentic videos and help,. its beyond helpful to see and hear your thoughts as you work, Most Excellent
Great Video, thank you sir 👍
Great video man
Stop being so damn awesome Jafo, also all the things Ive learned from you, put into practice came to fruition on Sunday with a track day. Vid is up.
No joke people, go look at what he built!
@@Jafromobile If you're ever in Aus look me up. I'll take you for a hot lap. You're vids were the ones that gave me the confidence I could build that engine in my own shed.
@@vlad7951 Its not hidden mate. The algorithm just hates me
They are called guess-O-meters. In matching shops!
Or the approximator 2000
Bearded Jafro is a productive Jafro.
Jafro! wanna see that gsx run ! keep it alive.
thanks for the upload :D
what a nice job. Where did you buy the vacuum pump?would you have a link? Thank you
If you do heads all the time, get a set of precision pins, it makes check heads quick and simple
Hey Jafro!!! Can you make a vid on how to create your valve spring compressor tool? Pleeeeease 😁
excellent video brother. what do you do for work?
AMC gains and a jafro video! What a great day!
I’d hit the like button but I do enjoy your voice overs. 😂 who am I kidding I hit the like button anyway.
I do like to add not all calipers are bad. I work as a machinist and we use calipers that measures dead accurate on 0.01mm which is constantly confirmed by micrometers. But those calipers cost 480 bucks each. And after little over 2 years of use they become sloppy and only measures +-0.01 off the real measurement and at that point the caliper gets retired as welding calipers. They can be maintained by taking them apart and getting new copper springs (looks kinda like the springs used on a apex seal on a rotary engine)
You're illustrating *exactly* the point I was making! $20≠$480. $480 is more than the .0001" micrometers. People are going to roast me when I rely on a digital tool in the next video.
@@Jafromobile I only feared that everyone watching the video will start roasting machinists for using calipers.
Keep up the amazing work on the videos, i and the rest of the viewers seriously appreciate it big time.
Liked the video but please don't talk much less... it's partly the reason why I watch this channel, it's extremely informative and I love the shade you throw at medium-brained professionals.
Jafro you should set up a tip option on your TH-cam page. I really did appreciate the your teachings!
Paper towels!? This most be a Patreoms quality video! Thumbs up
Thanks for all u have done
Started with a 97 mirage 2dr 1.8
To 1.8t pnp head thanks to u
And now 2.4 all motor
Dohc head swap parts on deck.
Are u any good at 5sp lsd?
Ideas on a road car? 06 eclipse trans
Love this!
As always I love your videos. Please no more silence though it's weird.
"precision estimate" I like that.
harbor freight is that old mechanic that's always drinking and says "good enough"
I have a digital calliper here. It uses 3 measurements. MM inch, & fractional. It came with a calibration certificate, meaning it is extremely accurate. It should be, as it cost me a small fortune, not one of those $40 jobs either. I used to fix cars too, and this often included major reco work.
So you get why I'm picking on the $20 units... ;)
@@Jafromobile yes, I do. I'm the same. I pick on cheap & nasty tools too. :)
How about guage pins for checking bore sizes?
"NOW YOU KNOW" got me dead
hi jafro, Can i use 2.0cfm single stage vacuum pump for this job, by the way im planning to do valve job on my bike which has done 60000km (R15 V3). And I appreciate you taking the time and making the effort to make the information shared more understandable.
Holy shit this is gold you sir are a godsend for People like me
MAN,, you are awesome..
very nicley done sir.
excellent stuff.
Thank you!!
MY DAWG!
@@802Garage my man!!
Can anyone share where to find specs for a specific head? Does anyone have a reliable source or looking for it individually is required
welp cancel dinner plans, i got a 47 min dsm video to watch!
I use dry erase marker on the seats to check the contact pattern.
Yeeeey!!! Jafro is on!!!