Lapping and Checking Valves (EASY WAY)

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  • Опубліковано 22 гру 2024

КОМЕНТАРІ • 376

  • @jovedean6112
    @jovedean6112 4 роки тому +68

    I am a certified mechanic and use this method along with other shops. His seats are in spec. He did a great job! Thanks for sharing!

    • @simonyoung1265
      @simonyoung1265 3 роки тому +3

      Thanks for this comment mate..I'll be doing same when I get all the gear together..doing my diesel WL head..

    • @natanyofsho
      @natanyofsho 3 роки тому

      Wow

    • @DieselRamcharger
      @DieselRamcharger 3 роки тому +2

      you dont know what the fuck you are talking about.

    • @natanyofsho
      @natanyofsho 3 роки тому

      @@DieselRamcharger all I said was “wow” what’s wrong with that?

    • @DieselRamcharger
      @DieselRamcharger 3 роки тому +1

      @@natanyofsho i replied to the OP not to you. notice your name isnt tagged in. the youtube comment section is so stupid how it works.

  • @DrDLightful
    @DrDLightful 3 роки тому +27

    I run a small engine shop, after the only machinist in the area retired I bought a hand set from Neway to cut valves and seats. They use carbide cutting bits and they make a very different finish than a stone cutter. I cut the valves at either 30 or 45 depending on spec. Cut the seat to a 46 or a 31 depending on spec, and use a maybe a 31 on a 46 at the top if the valve is seating too far outward. Once I get them seating pretty good I take a fine lapping compound and hand lap for no more than 5-10 seconds tops. Prolonged lapping will concave the face of the valve and destroy the new finish. For the lapping I take a piece of fuel line and push it over the valve stem and rub my hands together with the fuel line between them (like starting a fire with a stick). Finally I use a permanent marker and color the face of the valve, clean the seat really well and turn the valve no more than 5-10 degrees. This checks the contact all the way around the valve, note that turning the valve further would rub the entire face of the valve across any high spots there may be. Not the most professional way by any means but ones I've done 6-7 years ago are still running good when they come in for spring service.

  • @jcr8834
    @jcr8834 7 років тому +73

    lapped my valves today. used some of your info. I went back and forth with the drill rotating direction. My seats and valves came out great with no scratches. Holding gasoline as well within the chambers.

    • @myintkyawmoe5373
      @myintkyawmoe5373 4 роки тому +1

      Thank you.

    • @jcr8834
      @jcr8834 4 роки тому +6

      @@myintkyawmoe5373 lol 3 years later.

    • @norvigosracing6948
      @norvigosracing6948 4 роки тому +2

      Just catching up with the valve job. Is the engine still ok?

    • @lusun8078
      @lusun8078 3 роки тому +1

      @@jcr8834 Is your valve job holding up good?

    • @jcr8834
      @jcr8834 3 роки тому +10

      @@lusun8078 yes no problems. But sold the engine already

  • @66mustangguymoreau36
    @66mustangguymoreau36 6 років тому +14

    I like to shine a bright light into the port area to make certain the valve seat will seal properly. Works very well. Good job

  • @austinlemaster1150
    @austinlemaster1150 3 роки тому +3

    someone get this guy a beer. I like how you think and work. great video!

  • @richardalexander7089
    @richardalexander7089 6 років тому +4

    Ignore the *haters*. There are quite a few of these videos out there. You placed a disclaimer at the beginning. That should be enough. I learned a lot from this video. Thank you! I've also looked through the comments and found some good info. As well. If I combine your video and some of the comments, such as (paraphrasing here) "..the surface should be a dull grey and not really shiny. " has helped me a lot! Thank you again!

  • @timmclennan6616
    @timmclennan6616 4 роки тому +10

    I've been getting great results for years using a variable speed drill on the valvestem and pulling it rather than pushing. Only tried it because my lappers suction cup had dry rotted.

    • @DieselRamcharger
      @DieselRamcharger 3 роки тому +1

      you havent been getting good results.

    • @roguepoops23
      @roguepoops23 3 роки тому +4

      @@DieselRamcharger got nothing better to do, eh?

  • @jamiesimpson1786
    @jamiesimpson1786 2 роки тому +5

    Generally lapping is back and forth and rotating the valve on the seat. It is normally used to fine tune the contact after both valve & seat have been refaced. This method maybe a little harsh.

  • @nerfcommando149
    @nerfcommando149 Місяць тому

    im working on a riding mower and this is just what I needed. i only have 2 vales to worry about but a good way to learn.

  • @ryandavis6660
    @ryandavis6660 7 місяців тому +2

    Stratforward demonstration ! Brilliant.

  • @amacca995
    @amacca995 6 років тому +7

    I tried a similar process myself except i used a hose on the other end of the valve and connected that to the drill.
    I changed direction of the drill a lot, not sure why but figured it might help.
    I did not have the suction thing you had. To my delight it worked much like yourself. Always satisfying to do your own work.
    Well done.

    • @snowblind5151
      @snowblind5151 6 років тому +4

      I tried the hose did it about 5 to 6 times sound didn't come clean and the hose wobbling scares me to think of whats happening to the guide. I would much rather try pushing the valve perfectly into the seat than bending or warping the stem and oval wear on the guide.

    • @billholt174
      @billholt174 2 роки тому

      @@snowblind5151 I had similar thoughts. It would seem to be much more accurately done with the control permitted by direct feedback of the feel if you were to use a low-cost hand-held lapping tool. That gizmo is essentially a time-tested standard.
      I can't imagine an advantage to sleeving the stem with hose and having to pull it backwards or upwards against gravity to do this with acceptable precision. I'm not hatin', just statin'.
      As well, people who use power tools for more finesse-dependent work like this are the impatient horn honkers who pass cars to be first in line at the next light. : ] Unless you can work with the exactness of a CNC machine on a job like this I don't think that a drill is your friend for anything other than getting this done in a hurry, as in a busy dealership shop or a half-assed Sal's Garage. It's easy enough to make a mistake by hand, and the force inherent in a drill is a mere extension that can take a correctable mistake to the level of irreparable fuck up.

  • @jdmr.3346
    @jdmr.3346 4 роки тому +31

    I lap by hand so you can hear and feel what is really going on. It takes much longer but it's very gratifying knowing it's done perfectly.

    • @joet6990
      @joet6990 4 роки тому +2

      How long does it take to do by hand? I have a head off a dirt bike where the valves tapped the piston, the valve area where it sits looks alright but has a good bit of carbon build up. Would this get rid of the carbon also or do I need to get rid of that before doing this method?

    • @Snorky_88
      @Snorky_88 4 роки тому +8

      @@joet6990ive lapped hundreds of valves get rid of all the carbon make sure it is completely cleaned first than get some engineers blue its good for beginners so you know where your at other than that its easy when you lap by hand it will get quiet the more u lap thats when u check

    • @joet6990
      @joet6990 4 роки тому +1

      @@Snorky_88 well I ended up just letting it sit in rust remover overnight and that removed almost all of the carbon buildup inside of it, I also watched a video on laughing valves which may have been yours. I kept going until all I saw was that silver line all the way around this seat and there are no black pits in it. when I blow into the intake hole and push my valve all the way in I can notice there is a small air leak. I put some soapy water onto everything and it looks like the air leak is coming from the new valve guide from the inside of it. Is that going to be sealed up when I put a valve seal on the end or is it still going to continue leaking? Will that cause compression issues?

    • @Snorky_88
      @Snorky_88 4 роки тому

      @@joet6990 did you ream the valves? Or check the tolerances of the valve guides? I would check the correct bore hole and see if yours is in spec with what your manual says they could be worn out im doing valve guides on a triumph 650 right now and similar thing happened to me oil was seeping past the guides

  • @marty7922
    @marty7922 7 років тому +57

    Lapping valves is not a machine shop only job, they usually grind, maybe replace stems. I use drill & hose on stem lapping, w/ finger grease to press the valve in & out lightly (let the compound do the work). Just push the compound back into the seat when it squeezes out.
    Prussian blue (or marker pen) isn’t necessary, you can easily see the gray resurfacing from the lap. If you’re really concerned, when done put alcohol on the valves and look for leaks in the ports.
    FYI Extra compound will not hurt the job, running it w/o compound can gall making scratches (same type metals gall). You can easily clean off the compound & not worry about grit in the engine.
    TIP - A wider contact surface on the exhaust is desirable, it pulls heat off the valve. A narrower contact on the intake helps prevent the seat from cooling (shrinking and dropping). Some valves have a 1º offset and not a solid contact (good for intake).
    Everybody has their own take on valve jobs, use what you feel’s best. You can get so perfect with stuff and still not have any better performance - just avoid burnt valves and dropped seats. If any of you are really that concerned, then replace the valve guides also. Nice video.

    • @therandommech9099
      @therandommech9099  7 років тому +3

      Thanks for the info.

    • @henryfuentes3425
      @henryfuentes3425 6 років тому +3

      0-Zone I like the alcohol idea . My papa told me to use gas to check if it was good. A little less fumes your way.

    • @spooky3173
      @spooky3173 5 років тому +2

      @@henryfuentes3425 whats wrong with some fumes, makes the job more fun

  • @vanillagoose4444
    @vanillagoose4444 5 років тому +7

    I liked the Tap Dancing Squirrel ! He was getting his funk on while chewing them nuts !

  • @Midnight_Rider96
    @Midnight_Rider96 6 років тому +5

    The best way to do a diy valve job is lap the seats until pitting is gone, then have the valves ground at a machine shop to restore a perfect cone shape, the do a final light lap with fine compound. Cutting the seats is where most of the money goes, and hardened seats tend not to wear as quickly as valves anyway. More importantly, the valve needs to be able to expand from heat and still seal. You only get that back by grinding the valve. Lapping a worn valve will make it seal only in the exact position it was lapped, which won't matter when it heats up and expands

    • @ThomasJeppesen
      @ThomasJeppesen 6 років тому

      Alistair B what would be the consequences of a too large contact area between seat and valve? I’m changing the valves on my motorcycle, and after lapping it looks great, but the contact area is right around service limit on exhaust side. It’s not that I’m lazy to go have the seats cut, but I live in Vietnam, and I really don’t want to have the machine shop molest the head. If it’s a question of longevity, I can live with that, but I wonder if there are other issues? Cheers

    • @borna430
      @borna430 2 роки тому

      A valve that goes to the machine shop is much more expensive than a new valve :)

    • @Midnight_Rider96
      @Midnight_Rider96 2 роки тому +2

      @@borna430 not necessarily. I worked in a machine shop we always ground the valves if they weren't too damaged. New valves can be pretty expensive or hard to find for vintage or exotic engines.

    • @vadski3469
      @vadski3469 11 місяців тому

      Would I be okay lapping new valves with used, unlapped seats?

    • @vadski3469
      @vadski3469 11 місяців тому

      Aftermarket valves that is.

  • @bajanboyhood
    @bajanboyhood 5 років тому +7

    Seemed to grind those seats pretty long. How much were your shim Clarences out after your lapping process?

  • @geraldswain3259
    @geraldswain3259 6 років тому +3

    Preferably a lightweight one ,and then produces a hulking great 20v model !.

  • @lesglover6515
    @lesglover6515 6 років тому

    Thanks for taking the time to upload this video to let average guys and girls know how to clean up a cylinder head. Well done.

  • @wetcmonkey
    @wetcmonkey 5 років тому +1

    I did something similar, I use a smallvacuum hose attached it to the opposite end of the valve stem and pulled up instead off pressing into it. I didn't have the lapping tool as you did but worked just as well. If it works it works

  • @algonzalez8798
    @algonzalez8798 7 років тому +47

    This is a good Old School trick we "Budget Racers" used. Might use less lapping compound and keep the speed as low as you can.....save the valve guides. Also, the marking dye should be transparent when applied properly.....but, all in all great information to help those that can't afford those machine shop fees which now are just crazy!

    • @dirkrosslee796
      @dirkrosslee796 6 років тому

      I just use the 2 stage compound .clean off nicely. Assemble and pour some feul to check for leaks.

    • @martinez1701a
      @martinez1701a 5 років тому +2

      Machining is outrageous now adays $90 for a simple crank polish or few hundred to resurface a set of heads is bullshit!

    • @martinez1701a
      @martinez1701a 5 років тому +2

      @@dirkrosslee796 yeah gas or acetone is great for checking seats.

    • @ColdWarVet607
      @ColdWarVet607 5 років тому +3

      I used soapy water (lots of dish washing soap) over my valves after pulling the head, then blew compressed air under the valve and watch the bubbles grow. After a good lapping no more bubbles.

    • @2andrewd
      @2andrewd 5 років тому +6

      transparent marking dye. you just won a patent.

  • @MrHandy-hz5ju
    @MrHandy-hz5ju 7 років тому +1

    you can measure the seat like that to be accurate.. you have to check runout. which is a measuring tool you can you in a circular measurement. look up measuring valve runout. its basically a dial indicator..

  • @samlorca7974
    @samlorca7974 5 років тому +77

    This is manual process, don't use an electric tool!!!

    • @motleymenace
      @motleymenace 5 років тому +20

      I've personally done it this way a couple times so far during my apprenticeship and have not had any problems, however I can see why you personally may choose the original way over this as it could be easy to make a mistake like this, however I feel if you take your time it can still do the job right and save you a lot of time.

    • @llewvirtue861
      @llewvirtue861 5 років тому +8

      I wanted to cringe when I say that power tool, I started my trade doing heads in cummins engines.
      The face of that valve and the seat should both should have been faced.
      This is a short term solution

    • @55chevytruck
      @55chevytruck 5 років тому +3

      Bob Glidden used to use a food mixer back in the day and I seem to remember his pro stock motors ran pretty well.

    • @jackm5213
      @jackm5213 5 років тому +2

      That valve and that seat are so bad that the valve should have been faced and seat cut to ensure apropriate angle and back cut lapping fucked valvles like this will cut its own angle and destroy CFM

    • @TakeDeadAim
      @TakeDeadAim 4 роки тому +17

      BS. I build/rebuild roughly 20 heads of all makes per week. I use a drill on every one of them to lap the valves. Been doing it that way for roughly 7 years. You deal with the Doodle stick if you want. I'll do the same job...better...in 1/10th of the time. Also, no need for prussian blue. After you've don't enough you'll know by sound and feel. You can also use a sharpie if you really want. And yeah...that was WAAAAAY too much!lol!

  • @kenchorney2724
    @kenchorney2724 5 років тому +2

    At 6:12 it looks like there is a crack between the valve seats.

    • @automotivejunk5291
      @automotivejunk5291 5 років тому

      that is just a build up of carbon within the chamber

  • @waynep343
    @waynep343 4 роки тому +2

    HUGE HINT.. if your valve seats are 44 or 45 degrees.. take an extra valve and grind it to 60 degrees so you can narrow the seats up from the bottom with lapping compound. you may need a slightly larger valve to grind a 30 degree seat on that to narrow valve seats from the top with the 30... you will have to do this with exhaust and intake valves.

  • @norain31
    @norain31 2 роки тому

    When valves arent flat and suction cup wont stick i use a 1/4 fuel hose . I slide the hose over the valve stem from back side and i put a short peice of dowl in the drill side of hose . Clamp on drill then do the lapping . just another way i thought id mention .good job there bud .

  • @AmicosBarandgrill
    @AmicosBarandgrill 7 років тому +16

    Great video! I would also use the drill alternately forward and in reverse and at a lower rpm.

  • @5hawks
    @5hawks Рік тому

    Where are you finding suction cups that stick? I bought new, genuine "made in China" rubbers and finally had to rotate the valves with my fingers. (they didn't need lapping anyway, just a "feel good" exercise)

  • @davidsundquist1845
    @davidsundquist1845 4 роки тому +1

    try a leak down test-fill the chamber with clean solvent-should hold over nite without leaking.

  • @Turbogto_guy
    @Turbogto_guy 6 років тому +1

    To any of the people saying this won’t work and this isn’t a good job, I’ve done the same thing on engines many years ago that are still running perfectly. All you need is the valve to seal against the seat. If the valve has a coating and you wear it off then the valves won’t last. So in that case you replace the valves and lap new ones in that aren’t coated.

  • @MotoBuilds
    @MotoBuilds 6 років тому +14

    What is that weird tapping noise in the background...

    • @jankindl915
      @jankindl915 6 років тому +7

      Camera focus.

    • @bustyboy123
      @bustyboy123 6 років тому

      Cody Tessmer lol yes

    • @MrFredsAdventures
      @MrFredsAdventures 6 років тому +1

      Sounds like those teeth chattering zombies on World War Z

    • @LadyJesterSurfer
      @LadyJesterSurfer 6 років тому

      I'm guessing a fan

    • @VenturiLife
      @VenturiLife 5 років тому +1

      Auto-focus motor in the camera constantly re-adjusting.

  • @garyclagett1848
    @garyclagett1848 4 роки тому +3

    Very nice, easy to follow video. Do you ever reverse the drill? (Back and forth)?

  • @B70-l2d
    @B70-l2d 6 років тому +19

    Sitting here laughing at all the tapping complaints 😂😂😂

  • @carl_marks1626
    @carl_marks1626 4 роки тому +5

    It went from a 3 angle to one big angle valve job.

    • @charlesbrewer6552
      @charlesbrewer6552 3 роки тому +1

      My aircraft engine manufacturer recomends (during an engine maintenance course where we did it) to cut the 3 angles and then lap to achieve a minimum seal. Checked with prussian blue to about 1mm or less, but a continuous, definit seal.
      The lapped seal was to be in the middle of the valve seat and the valve face.
      They said "BY HAND", do not give it to engine shop who will put it in a machine to do.
      The method shown here appears to destroy valve and seats angles.
      Well, that's what I was taught by the manufacturer of my aircraft engine.
      But, what would they know?

    • @jacquespoirier9071
      @jacquespoirier9071 Рік тому

      @@charlesbrewer6552 it is the best way to confirm a good valve contact, I never use a machine of any kind to lap valves after grinding.
      On modern engines, it happens frequently that the valves and seats are in a very good condition so just a very light lapping to clean the contact is required.

  • @andrewnardo1021
    @andrewnardo1021 4 роки тому +1

    I’ve lapped valves with a drill more times than not and have had literally 0 issues. From small engines to large agricultural diesels. Never had wear issues or leaking issues. Would I use it for a high performance application, no, but for re lapping good used valves during a rebuild there’s no issue.

    • @joshcallaghan9432
      @joshcallaghan9432 4 роки тому +1

      People like to bag out what they've never tried and love the "oldskool way". That may be better but could you feel the difference? I doubt it. I did this the other day and it seemed to work. My Exhaust valves leaked air, now they dont. Gotta be happy with that!

  • @molliarti
    @molliarti 6 років тому +1

    Companion,I think that make this don't good,I was learn when put a compound,the movements of valve its right-left right-left right-left.
    Why you use the drill in a one direction?
    Thanks for your time.

  • @carlosruiz9963
    @carlosruiz9963 Рік тому

    But do they have to seal ?100 percent cos a still have very tini air comprecion los even after polishing
    😢

  • @davidmiles4394
    @davidmiles4394 5 років тому +1

    I've been doing mine the same way but I've been doing the water and air test and still got a couple valves that's leaking

  • @ylwgtr
    @ylwgtr 7 років тому +55

    Is predator hiding in your shed there?

    • @J__C__
      @J__C__ 6 років тому +3

      ylwgtr glad I'm not the only one that noticed that annoying shit

  • @bottmar1
    @bottmar1 6 років тому

    Just be sure to use grease based lapping compound as the water based crap doesn't spread very evenly since the valve likely has some oil residue on it. Also water based compound dries up in it's container. Grease based stores forever.

  • @sleezymechanic
    @sleezymechanic 4 роки тому +2

    The service manual made it very clear I was suppose to 1/4 turn with the prussian blue. To turn or not to turn.

    • @johnwoodrow8769
      @johnwoodrow8769 3 місяці тому

      Because the Prussian blue should be applied so thinly it is absolutely necessary to slightly twist the valve to transfer some of it to the valve seat to get a reading.

  • @TunerFaction
    @TunerFaction 4 роки тому +5

    Though this is an old video I thought I might try and steer some people away from lapping your valves. Though it may seem intuitive, lapping your valves will actually produce negative effects for your engine. This is because when you lap your valves, you do it when the block is cold. This means the valve may seat well when the engine isn't warmed up, but when you are up to operating temps, your valves will no longer seat correctly. This is why it's always best to get your valve seating done at a machine shop.

    • @owaind-g678
      @owaind-g678 3 роки тому +5

      Are you suggesting that a machine shop would heat up your head and valves to lap them together?
      If you were to send a head to a machine shop for a valve job its likely going to be more than just lapping valves, maybe cutting angles onto valve faces/seats, installing new valve guides/seats, Lapping would be done as the final step of a valve job sure, but it wouldn't be the sole reason to send it.
      I regularly see vehicle manufacturers explain how and why to lap valves in the vehicle manuals quite often.
      I personally believe your advice is not based upon any evidence, its just more of an opinion.
      Valve lapping is not that difficult and if you managed to dig them out of the engine your probably competent enough to rub em together a bit. just my opinion though.

    • @TunerFaction
      @TunerFaction 3 роки тому +4

      @@owaind-g678 Hey Owain thanks for the reply good sir! I appreciate the respectful disagreement and thought I might respond to your response. So I don't think a machine shop heats up the head and then laps valve seats. Like you said, when you get a valve job done at a machine shop they cut new seats at various angles and then as a final step, they very briefly lap the valves to remove any peaks from the valve seat cutting. In the research I have done, lapping your valves without getting new seats cut is a bad idea and can cause problems down the road. There is a great video from HP Academy on UA-cam that explains exactly why lapping your valves is not a great idea. If you were interested, just search up "Can I lap my valves at home?" By HP Academy. There are a few other reputable sources that also say the same thing and the conclusion that I have come to is that lapping valves without getting new seats cut is a bad idea. I also agree with you in that it's an easy job to lap your valves by yourself, I'm simply saying that even if you do it correctly, I don't think it's healthy for your engine. This is obviously just my opinion, and I could be wrong! I just thought I would share what conclusion I have come to given the research I have done on the topic!

    • @owaind-g678
      @owaind-g678 3 роки тому +4

      ​@@TunerFaction Thanks for your reply and expanding on your idea, I understand your point better now and i agree freshly cut valves will always be the best option, but not always the viable option.
      Although there is a big difference between racing and road engines and id like to focus more on every day street engines for the at home "DIY" valve work we see in these videos online.
      Engines will still run even in awful conditions with pitted valves and bad compression and weak springs, could have your timing off and the things still run like a hot damn.
      Most the valve work I have had to do is on older vehicles with higher mileage, the parts aren't always available and can cost a small fortune if you can get them at all, sometimes resorting to second hand parts or donor engines, sometimes you just gotta do what you gotta do to get by and a lot of the time it means the parts will get cleaned off and put back together as they were, machine shop time is expensive and not always within the budget at this point i dont think you would be doing any real harm to the engine by improving the mating surfaces of the valves or seats, as long as your careful not to damage the valve guides should all be fine and dandy.
      I am still curious about the expansion of valves and seats to the point of failure to seal but in a racing engine with forced induction it may be the case, It's an interesting idea and i will do some more research into it regardless. Thank you for the heads up on HP academy channel i will be taking a look at their videos.

    • @TunerFaction
      @TunerFaction 3 роки тому +4

      @@owaind-g678 Owain thanks once again for being so civil about our conversation. Too many people on here would have just called me an idiot and moved on. I think you have a good point, I had crafted my opinion looking at this topic purely from a racing/forced induction engine standpoint where the best option will always be to have a machine shop cut your valve seats. On an older engine where parts are few are far between, I don't think their is as much of a problem lapping your valves at home to get rid of some pitting or worn out valve seats. In a case like that, you would likely improve the seating of the valve overall! You are also right that it's not in many peoples budgets to get a valve job at a machine shop, heck, I didn't even get a valve job at the machine shop because it would have cost me north of 1500 buckaroos. I would say that there is no "correct" answer, I think it changes from situation to situation. If you want to build a high horsepower race engine, lapping your valves at home is really not the way to go. If you are just rebuilding your daily driver or rebuilding an older engine with no intention of pushing big power, I don't think there is anything wrong with lapping your valves at home. Great conversation!

    • @Dylans503
      @Dylans503 3 роки тому +3

      Dear, Owain.
      Are you still there?... I miss you.
      ~ Your lover always, Tuner Faction.

  • @drdrakeramoray6738
    @drdrakeramoray6738 4 роки тому +4

    6.14 I can see the crack between valves seats

  • @Anenome5
    @Anenome5 7 років тому +18

    Light coat of prussian blue? That was about 20 times too much PB!!! It cannot act as a surface contact indicator if you put giant gobs of it on that like!

    • @therandommech9099
      @therandommech9099  7 років тому +1

      sorry about that, I know it was a fail..... forgot to mention that I did wiped most of it off camera.

    • @jdubcbr600
      @jdubcbr600 7 років тому +5

      Good video! There's always someone on the Tube that knows how to do it better than you and wants to tell you all about right? I wanna know why the hell are they watching if they know how to do it already? Self entitled pricks!

    • @joeeastman
      @joeeastman 7 років тому

      JoshW817 EXACTLY, everyone has to call him out on the same shit someone else has already addressed rather than read through the existing comments to see if their comment is even necessary. All those "pros" should just make their own - "this is the right way to do it" videos, then we will all be so impressed that we would be inclined to remove any video we've ever uploaded.....good video btw.

  • @Nunya_Beezwax
    @Nunya_Beezwax 5 років тому +10

    Prussian Blue is totally unnecessary. The lapping compound will leave a dark ring around the valve face when it's seating correctly

    • @johnwoodrow8769
      @johnwoodrow8769 3 місяці тому

      Wrong. What you describing is a way out of round valve seat. Once it is close, even fine lapping paste will score both surfaces yet 'bearing blue' will show it is still way out.

    • @Nunya_Beezwax
      @Nunya_Beezwax 3 місяці тому

      @@johnwoodrow8769 if you wanna get down to specifics, it depends on the year of the head, the material of the valve and seat, and experience. When using a titanium valve, sure Blue will show up imperfections lost to the untrained eye that lapping compound will not. I'm not about to get into all of the specifics with someone who has probably never even removed a valve from a head

    • @johnwoodrow8769
      @johnwoodrow8769 3 місяці тому

      @@Nunya_Beezwax You may be right, and have my experience than a qualified mechanic who has been in the trade for nearly 60 years, working on everything from lawn mowers, D9 Bulldozers, outboard motors, and now just content to rebuild motorcycle race engines.
      I've been in the trade long enough to see from the 1960's when it was necessary to lap valves due to the accuracy of the equipment being used (pilots fixed in the valve guide) to the advent of 'syncro' equipment where lapping became an obsolete and actually negative practice.
      P.S. I haven't lapped valves in race engines for at least the last 40 years (steel or hi-tec). The majority of modern performance oriented motorcycle engines use lightweight coated engine valves.

  • @renejacques8288
    @renejacques8288 5 місяців тому

    Why didn't you use your drill in reverse also?

  • @fatboysonny
    @fatboysonny 7 років тому +3

    Nice video, thanks. I have a compression issue with my WR250F. I'm almost certain it's valves, as the piston and rings were new and in tolerance. I already tried to lap the valves once, but don't think they were in spec. I will attempt again with a few of your hints, cheers!

    • @firstnamelastname7352
      @firstnamelastname7352 6 років тому

      Cant lap valves on dirt bikes. Replace only

    • @MotoBuilds
      @MotoBuilds 6 років тому +1

      I think the wr valves may be stainless. In which case they can be lapped in. However it is very likely your valve shims. Not the seat and valve itself...

    • @samdraper9340
      @samdraper9340 5 років тому

      How did you get on.. currently having some problem on my sherco 250

  • @joeabels3931
    @joeabels3931 7 років тому +4

    I tried this and it worked great. Thanks so much for the post.

  • @k2one9
    @k2one9 6 років тому +6

    Do you have a typewriter?

    • @TheWolf047
      @TheWolf047 4 роки тому +1

      thats what i thought to!!

  • @patriciasparks6740
    @patriciasparks6740 4 роки тому

    The cta lapping compound is it in two parts? All I can find it f/c black that seems to be like permatex valve grinding compound. Where did you get yours??

  • @Taydrum
    @Taydrum 4 роки тому +5

    You need to do this by hand, never with a drill, because you need to listen to the sound of the valve on the seat. You also need to go both directions

    • @bendude6748
      @bendude6748 4 роки тому

      I think both will do the job but I also prefer to do the job by hand I think you get a better feel for it.

  • @juntjoonunya9216
    @juntjoonunya9216 6 років тому +2

    What is that noise?? And I don't mind it

  • @fortuner123
    @fortuner123 6 років тому +15

    Your use of the blue it totally wrong. You use far too much. A very light smear and some partial rotation only. Use of a drill for lapping is wrong, it should be a hand back and forth movement.

  • @ralphbrown2714
    @ralphbrown2714 5 років тому +21

    You were right ,not done by a professional.

  • @pauljanssen2624
    @pauljanssen2624 4 роки тому

    And if I'm not mistaken at 7:37 there looks like a crack in the head between the two valve seats

  • @ominguti6345
    @ominguti6345 5 років тому +3

    You're using way too much prussian blue. Those dabs with the tube you make along the radius of the valve, one would suffice. Then you should smear the prussian blue around the valve with your finger so there is a very thin even amount. It should look even, then you press the valve into its seat and you give it a "slight" whack with a piece of wood or plastic. This transfers the blue sufficiently. This method will show you half a thou out of round, while your method will probably show great transfer with 10 thou out of round.

  • @prophaniti1
    @prophaniti1 5 років тому +4

    Great way to socket the seats....

    • @hacwa
      @hacwa 3 роки тому +1

      what does this mean? - don't actually expect a reply but worth a shot :D

  • @pauljanssen2624
    @pauljanssen2624 4 роки тому +3

    When you over lap a valve into the valve seat you around the seat and don't have a true interference fit it will work for a short time but you'll end up burning a valve a rounded angle and not a true 45 flat angle worst thing you can do is use electric drill

    • @fretzmaler7591
      @fretzmaler7591 Рік тому

      You Are absolutely right here, the drill method is for the lazy Boys and wrong seat fitment, this drill method is harsh.

  • @Rashid-ee5ig
    @Rashid-ee5ig 3 роки тому

    Lapping tool ka link bhi send karna

  •  4 роки тому

    Seat and valve seat are freshened up but the stem is shot..

  • @NKPGarage
    @NKPGarage 2 роки тому

    Great job. And very good to see you check the spec.

  • @szbalogh
    @szbalogh 5 років тому

    Did You wash the lapping compound in the valve guide? :o

  • @grahamlangston2101
    @grahamlangston2101 4 роки тому +6

    Using a drill in only one direction will cause lining Mark's lazy way of doing a job

  • @carlescarles4112
    @carlescarles4112 4 роки тому +1

    what size grit did u use of the grinding paste?

  • @tanaseav
    @tanaseav 7 років тому +39

    that's not how you use Prussian blue, you used 5000% too much :)))

    • @terryegan5113
      @terryegan5113 6 років тому +7

      I second that! You're only supposed to put a stain on the valve and see where it transfers to! And you are supposed to turn/rotate it. You aren't supposed to glob it on the piece like tar on a leaky roof!

    • @mceperformance8978
      @mceperformance8978 6 років тому +12

      That's not how you use ANY of the products shown on this video. It's more of a "how NOT to" video!
      Some people are idiots. (The squirrel sounds were annoying too)

    • @blainjohnson801
      @blainjohnson801 4 роки тому +2

      I wouldn't let him touch anything of mine this is so wrong!!!!

    • @donalddodds8311
      @donalddodds8311 4 роки тому

      Just enough blue for a good splash check! Lol

    • @Alessandro-dz3cw
      @Alessandro-dz3cw 4 роки тому

      Yeh

  • @youthised58
    @youthised58 5 років тому +1

    Wouldn't it be wise to replace the guides first befrore lapping. Worn guides causes valve stem wobble. I mean, if you're looking for perfection why not start with perfect guides and not worn ones? If there's wobble at the end in the guide, the wobble at the valve end would be even greater. Equipped machine shops cost a lot but they can save you the trouble of starting over again.

  • @gibamec7636
    @gibamec7636 4 роки тому +1

    Good job, Master!

  • @theunknownone5663
    @theunknownone5663 6 років тому +1

    What is that backround noise?

  • @BigJsgarage
    @BigJsgarage 8 років тому +40

    You have enough lapping compound on one valve to do the hole head.

    • @therandommech9099
      @therandommech9099  8 років тому +8

      just getting rid of some old compound.....

    • @bikejunk1
      @bikejunk1 8 років тому +5

      Problem with using too much is getting it all out of the valve area and seal it is like throwing a hand full of very fine sand in your engine not good

    • @therandommech9099
      @therandommech9099  8 років тому +22

      True.... But I did pressure wash the head in the end

    • @macncheese1991
      @macncheese1991 7 років тому +27

      its his build he can do whatever he wants.

    • @lesglover6515
      @lesglover6515 6 років тому +13

      BigJsgarage w maybe you could put your own video up if you don't like his.

  • @Michael-lg4wz
    @Michael-lg4wz 6 років тому

    how does your suction cup work so well ive tried cold water warm water, a little detergent, CRC,dry,light sanding

  • @Just1Spark
    @Just1Spark 4 роки тому

    The background noise is the cameras auto focus lol. Not a mouse.

  • @road2ziondesign988
    @road2ziondesign988 2 роки тому

    Excellent job and great detail thanks for sharing.

  • @michaelcwilson2
    @michaelcwilson2 7 років тому +11

    Great video. A little advice, go way lighter with the blueing. Cheers mate

  • @Rashid-ee5ig
    @Rashid-ee5ig 3 роки тому

    Valve hand grinding machine kaha milegi link send me

  • @doddgarger6806
    @doddgarger6806 5 років тому +5

    Lapping alone isn't a valve job
    Get this wrong and you'll end up with a burnt valve, they will cake with carbon and too wide of a seat cant cut the carbon and self clean
    That's the reason for the specs on the seat width, usually about 1mm up to about 1.5mm 0.040 to 0.060 max typically
    I tried, I learned, I bought a neway seat cutter and mandrel set so I can actually do a real valve job for about $150 used on Ebay
    This is after lapping 6x pitted exhaust valves that ran perfect before I touched them
    After lapping with a drill it ended up with a few valves caked with carbon and a terrible running jeep

    • @crownvictorialifestyle4421
      @crownvictorialifestyle4421 4 роки тому

      Dodd Garger it's the internet you know all the morons will believe and continue to think that this process is a basic valve job when it is simply not as you stated
      this process is absolutely pointless without a valve job but like I say it's the internet and there be 20 other people doing the same garbage
      You and I know that this is done after a valve job is done to check to see where the valve and the seat meet
      There's different purposes for where they want the seat and valve to meet up is the only purpose for lapping compound

    • @garyr7027
      @garyr7027 4 роки тому

      Many will disagree with you, and many more done valve lapping with success. I've done this before myself and I know it works, never had issues. I didn't do it quite this way but nonetheless I've done it. Perhaps you didn't lap the valve right? Or perhaps you took too much off? This trick will work, however you have to make sure the seat and the valve is good enough for it. Too much pitting and this is not the idea solution. It's only good for minimal grinding.

  • @torque395
    @torque395 Рік тому

    What engine is this head for?

  • @JJAH408
    @JJAH408 5 років тому +1

    He has clearly never used engineering blue to shut anything out properly before , that valve could have a 0.010" gap and would still blue up with the amount on there , should be applied with a tooth brush / paint brush sparingly , that blue is telling you nothing , and yeah thats alot of compound and no lubrication for the lapping

    • @JJAH408
      @JJAH408 5 років тому +1

      @Red Pilz hey , first of all im not a valve lapper by trade and I've never lapped a valve . That being said , I am a tool maker by trade , I make lost wax injection mould tools for turbine blades and have made various other tools such as plastic injection mould tools and rubber mould tools , I can diamond polish to a mirror finish and blend die forms out to name but a few of my skills in my set , so I use all the same stuff in this video but in a different application .
      To best answer your question , the lapping paste in this video is quite "dry" , my diamond polish I get is much the same , if you just use it as it is , it will kind of "clog" up and also get hot with the drill., I dont think you need to drill it , better twist by hand , but each to there own , I would personally add a touch of cutting oil if available to the lapping paste when applied , or any oil or wd40 you can get your mits on , your lapping paste will last you longer and you will get a better finish , obviously the more oil you add the more you "water it down" so will take longer and take less material off , but a little wont hurt and you will find it just makes everything better and nicer , and if your lapping valves , use some engineering blue like in the video but use x100 less than him and apply evenly , press valve in , don't twist , and remove , it will take practice to "read" the blue on the valve but its not rocket science , hope that helps you , good luck on the lapping , if you need more help with the blue just ask

  • @nvdubs
    @nvdubs 6 років тому +5

    Couldn't make it past 1:17. The tapping sound from you camera is unreal.

  • @SacreDro
    @SacreDro 7 років тому +16

    I see only scratches on the valve seats, not a good job sorry to say. A manual job is the way to go.

    • @therandommech9099
      @therandommech9099  7 років тому +29

      True, the scratches were due to the valve seat lapping dry. My mistake, less lapping and more checking, plus I never really expected anyone to watch my video's.

    • @angelito1906
      @angelito1906 6 років тому +1

      estoy haciendo ese trabajo para un motor de suzuki forenza 2007, uso menos pasta esmeril y le agrego un poco de aceite para evitar un poco el roce y lubricar mas los asientos para evitar un poco los rayones.

    • @richardjohnson9275
      @richardjohnson9275 6 років тому +3

      Go into the pits at a NHRA event and you'll see that most of top fuel and funny car nitro heads get the valves lapped between rounds. nothing wrong with valve lapping! I've lapped valves for YEARS on engine overhauls and NEVER had a problem!

    • @tomassosaoconnor
      @tomassosaoconnor 5 років тому +1

      @@angelito1906 esos rayones son tu superficie esmerilada. Si se necesitara aceite en los asientos, el compuesto para esmerilar ya lo traería. Yo hice el trabajo de forma manual (sin taladro) en un Fiat 1500 '67 y quedó impecable, solo usando el compuesto grueso y luego el fino. Con el segundo hay que darle un par de minutos para que los rayones sean mínimos

  • @jacquespoirier9071
    @jacquespoirier9071 7 років тому +8

    lapping must be light !!!
    heavy lapping as you do creates a deformation of the contact seat and promotes a failure at a less than desired interval.
    Many times, I had to replace valves on low to moderate mileage engines because of a failure of the timing chain and most of the time, I seat the new valve by lightly lap them in their seat and i never had a comeback on those jobs

  • @untraditionalministries4588
    @untraditionalministries4588 7 років тому +32

    everybody on here complaining, whu font you do your own videos, he already said hes not a professional

    • @Elipro427
      @Elipro427 6 років тому +1

      Aaron Frazier finally someone with commen sense.

    • @J__C__
      @J__C__ 6 років тому

      Aaron Frazier English much, Aaron? Jeez. Whu font? Wu Tang for life! Lmao

    • @jacquespoirier9071
      @jacquespoirier9071 6 років тому +2

      this is good to confirm the contact on the valve seating area but there is a reason to rotate the valve in alternate direction, when the guide is not perfect, you end up with an egg shaped seat. and gouged valves. the best use of lapping compound is to confirm a seating contact on a freshly reground valve and seat and it should be done very lightly as there is an angle difference of 1 degree between the valve and the seat to promote an initial tight gas seal and this angle interference should not be destroyed

    • @fortuner123
      @fortuner123 6 років тому

      If he is doing a bad vid then he should expect corrections knuckle head.

    • @TonaldDrump686
      @TonaldDrump686 6 років тому

      Jacques Poirier : 👈 This guy is 💯 percent correct. Y’all should listen.

  • @emotionalintelligence776
    @emotionalintelligence776 2 роки тому

    You watch a video like this in which this guy meticulously laps the valve and checks it to see if he's in spec. Then you read a comment from an engine builder who with his 30 years of experience confesses he's never lapped a new valve and never had a problem, Lol. Not saying you should or should not that's entirely up to you and your peace of mind but hey if you are wondering if its been done that answer is a yes.

  • @desertrider325
    @desertrider325 6 років тому

    How do I clean the carbon stuck on the valves and head? Tried brake clean and a rag still stuck.

    • @MotoBuilds
      @MotoBuilds 6 років тому

      T R, why would you ever have carbon deposits on your throttle body....the intake valves should be sealed at the time of combustion.

    • @Spudderr
      @Spudderr 5 років тому +1

      Berkebile 2+2 gum cutter

  • @JK-dn4pu
    @JK-dn4pu 5 років тому

    Prussian blue has been used a many of times in inner shop terroristic games. 😂

    • @TonaldDrump686
      @TonaldDrump686 5 років тому +1

      Justin Folsom :Anti seize does well also......😂

  • @FordTechATC
    @FordTechATC 7 років тому

    I spent today lapping a cylinder head from a 6.4 ford diesel. I cleaned the entire cylinder head. Removed all carbon. Purchased new intake and exhaust valves. There 2 intake and 2 exhaust valves per cylinder. I lapped the valves using the hand tool and lapping compound mixed with grease from Permatex (it comes premixed). I doubled checked my work after finishing the cylinder head using water into the ports. Some water flows from the valves. A couple of drops here and there. The valve seats and the valves sealing surface looks perfect. Is this normal after lapping a cylinder head.

    • @jmonaghan6496
      @jmonaghan6496 7 років тому

      FordTechATC yes from the research I've done just now. It seems to be completely normal. Your good to go and good job ;)

    • @FordTechATC
      @FordTechATC 7 років тому +1

      I did my research as well and it is normal to have wetness. The correct way would be with the Prussian blue and measure seat and sealing surface. Called up a bunch of machine shops to make sure I was good to go. I reused that cylinder head and engine runs like a champ. The other cylinder head had a cracked exhaust valve seat. Had to replace it.

    • @jacquespoirier9071
      @jacquespoirier9071 5 років тому +1

      it is normal because you don't have the 1 degree interference in a worn out seat, this will not cause issues ad the volumes involved in the engine sweeping process are much much larger than that and as your engine will run, there will be a final match between the valves and their seats.

  • @mikerieck306
    @mikerieck306 4 роки тому

    ......and sometimes you need to do a Serdi valve job and replace the valves. Like right at the beginning of the video.

  • @jrlopez7874
    @jrlopez7874 7 років тому +1

    a pro grinded valves by hand

  • @shickenchits8123
    @shickenchits8123 Місяць тому

    I like the method. I see Way too much prussian blue used. I use the thinnest film possible. You can get a false reading when too much is applied. Otherwise, cool!

  • @Mattmorro67
    @Mattmorro67 5 років тому +2

    Sped up sounds like an old 22R turning over

  • @pantherplatform
    @pantherplatform 4 роки тому

    I'm halfway thru restoring a 1990 Ford 300-6 but the head and valves are like brand new still. The head is cast iron so I don't have to be as careful cleaning the seats as if it was aluminum. Looks like your a pro.

  • @75L48
    @75L48 6 років тому +1

    It must be bent to a degree no prussian blue is needed to see its bent before your method will read results. :D

  • @rustyshackelford8769
    @rustyshackelford8769 3 роки тому

    Sounds like when I get my teeth cleaned. I have to go now.

  • @learningchristian820
    @learningchristian820 6 років тому +2

    Not so sure about using the driver tool to finish out the job. Try this method. Start with a fine paste and add a spot of oil to it, work down by hand and feel for the cut fining out.Remove valve and clean it and the seat, check for a clean even cut, if there is a lot of cut still required then use the coarse paste and the drill, but sparingly.With coarse cutting complete finish them with fine paste and a drop of oil.Test with marking blue as shown and if all is good give each valve a final 'polish cut' with a liquid metal polish, just a few turns by hand and clean everything.By this method you should have a head in which the valves a liquid tight under their own weight and not requiring a spring to hold them closed when testing.Good luck

  • @michaelhayward7790
    @michaelhayward7790 2 роки тому

    Always remember to put the lapping compound on the valve stem and rotate whilst installing.. good as new right?

  • @sudhirtirkey3234
    @sudhirtirkey3234 Рік тому

    It would have been better if the grinding was clockwise as well as anticlockwise, intermittently.

  • @simssimms6522
    @simssimms6522 6 років тому +2

    Does the valve need to be sanded and perfect clean before the suction cup? Mine wont suction

    • @Michael-lg4wz
      @Michael-lg4wz 6 років тому

      I have the same problem ive tried cold water, hot water,detergent,dry,400 grid sandpaper thats why im looking at the drill methods

    • @christinetokyo5125
      @christinetokyo5125 6 років тому +1

      Use a hose on the other end

    • @tomassosaoconnor
      @tomassosaoconnor 5 років тому

      @@Michael-lg4wz I did polished the combustion chambers with the valves in, so the valves where polished as well, completely recommended

  • @sliverfang9379
    @sliverfang9379 6 років тому +1

    This is a very easy way to lapping valve seat at valve however this might may eat a lot of metal due to fast rotation at pressure compare to manual hand rotation..very informative video though

  • @braddistler5697
    @braddistler5697 5 років тому +5

    Valve seats should be exede 1/16” mating area. Those are fully worn out now. Lol

  • @woody5109
    @woody5109 3 роки тому

    I’ve done this many times, nothing wrong with using a drill. You don’t hone the cylinder by hand...

  • @TXARMYVET89
    @TXARMYVET89 6 років тому +20

    Video in fast forward sounds like a engine trying to start lol

  • @memadmax69
    @memadmax69 7 років тому +2

    Ouch. Scratched the hell out of that valve.