The Only Video You'll Ever Need to Know how 4 Stroke Engine Valving & Timing Works

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  • Опубліковано 23 лис 2024

КОМЕНТАРІ • 212

  • @TheRepairSpecialist
    @TheRepairSpecialist  Рік тому +6

    Hi guys I just wanted to Introduce to you my other Channel "Kirkman's Academy" - which i'm just getting started. It's a go-to channel for simple explanations for hard to grasp subjects such as physics, maths and chemistry etc. Here is the link: www.youtube.com/@kirkmansacademy/videos . Thank you so much for looking, and if these topics interest you then I hope to see you the there. Many thanks indeed. Craig 😊👍

  • @oldtownscouts3712
    @oldtownscouts3712 11 місяців тому +18

    I just understood something I haven't understood for like 29 years. Awesome video

  • @Brettarn
    @Brettarn Рік тому +18

    This was the most comprehensive explanation of how valve clearance works. Much appreciated the effort put in to explain for a newbie like myself. Instant subscriber

  • @michaelm2725
    @michaelm2725 Рік тому +21

    Great explanation and the cut-away motor makes it so much easier for visual learners to see what's happening, when and why. Very well done.

  • @williamejakita1357
    @williamejakita1357 Рік тому +3

    I am an Electrical Technologist, and this video has been very helpful in understanding engines. THANKS!

  • @ayeleraberra4338
    @ayeleraberra4338 8 місяців тому +5

    This the first time I have learnt how an engine works clearly. Thanks for clearing my confusion. Explained professionally.

    • @TheRepairSpecialist
      @TheRepairSpecialist  8 місяців тому

      Thank you so much for your very kind and motivating feedback. I really appreciate it. Craig 👍👍👍

  • @HankRearden84
    @HankRearden84 11 місяців тому +3

    Mate, many thanks. Timing has always been intimidating for me. This definitely helps alleviate that fear a bit.

  • @sajmirbekteshi9113
    @sajmirbekteshi9113 2 місяці тому

    You are the only one I have understood now. I thank God that I managed to watch this video. I wish you all the best, God bless you.

  • @abhishektalajiya1269
    @abhishektalajiya1269 11 місяців тому +1

    Just want to say that as your video title states- this is the only video I'll ever need to learn 4 stroke tappet clearance. 100% TRUE!!!!! After watching this video all my doubts and queries are cleared and the explaination with this model , amazing work man. Just AMAZING!!!!! I do hope you make such videos in future as well. And i request everyone to just watch this 11 min video with patience and all your queries will go away.
    Thank you again for making such simple video explaination.

    • @TheRepairSpecialist
      @TheRepairSpecialist  11 місяців тому +1

      Wow. Thank you so much. I really appreciate your kind and very encouraging comment. Craig 👍👍👍

  • @mirnaw1
    @mirnaw1 3 місяці тому +2

    I watched it as a marine engineer cadet and helped a lot to understand the principle even tho there are some differences. Thank you!

  • @davidmills5557
    @davidmills5557 5 місяців тому +1

    I cant Thank You enough for taking the time to make this video!! I can say that shamefully after roughly 5 hours of my life that I'll never get back trying to adjust the valve clearance on my 2005 Honda Recon ATV, God led me to your video!! What an ABSOLUTE answer to Prayer!! I just could not grasp the understanding of TDC on the "compression" stroke!! I was at my wits end..... I adjusted the valves I dont know how many times, but on the wrong stroke. With the help of your video, I was able to adjust the valves with NO Issues!! Thank you again SO VERY MUCH for the clear and conscise explanation, and the engine prop you used REALLY brought it home!!! Definitely downloading and bookmarking this video :) May The Lord Bless you and your family Brother 🙏

  • @SailingBritaly
    @SailingBritaly 6 місяців тому

    This is a superb video. I've not seen such good - concise, yet thorough - training since I was learning to be an aircraft technician in the Royal Air Force.
    Thank you very much, God bless, and let's hope the algorithm pushes this out to many more people. Chris 👍

  • @benthicmarine112
    @benthicmarine112 8 місяців тому +1

    Probably the only gold star explanation of valve clearances on UA-cam. Thank you for this content, liked and subscribed👌

    • @TheRepairSpecialist
      @TheRepairSpecialist  8 місяців тому

      Thank you for kind and motivating feedback. I really appreciate it. Craig 👍👍👍

  • @BoostedFA
    @BoostedFA Рік тому +1

    I had a good general idea of how the valve terrain operates, but after watching your video It's clear to me. Great video and very educational. Thanks, mate.

  • @Mike-zb7ts
    @Mike-zb7ts 2 місяці тому

    I bookmarked this video. Emailed it to myself. Texted it to myself. Sent it to my wife's email just in case I manage to lose it.
    This is gold. Thank you for this OUTSTANDING tutorial.

  • @RandyPate-t1d
    @RandyPate-t1d Рік тому +1

    Your video is very helpful for a novice and very much appreciated.

  • @vernonbosshard9317
    @vernonbosshard9317 Рік тому +1

    If the exhaust is too loose it will be difficult to start, the comp release won't hold the valve open enough. The compression release is a small tab on the camshaft that holds the ex valve open just a small bit to allow easy starting, when the RPMs reach a certain speed the tab slings out of the way and allows the engine to operate normally, so if the gap is too much the tab will only take up the gap and not hold the valve open.

  • @uph2011
    @uph2011 4 місяці тому +1

    You're the engine's boss! The best explanations ever about small engines. Greetings from Colombia.

    • @TheRepairSpecialist
      @TheRepairSpecialist  4 місяці тому

      Thank you very much! I really appreciate it. Craig 👍👍👍

  • @lightship-uk
    @lightship-uk 4 місяці тому +1

    Clearly explained, easily understood, concise & accurate. A well presented tutorial.

  • @danilo86petrovic
    @danilo86petrovic Рік тому +1

    Really detailed explenation... You forgot to say that there is a mark for top dead center on almost every engine...

  • @ahmadruizhakeem3482
    @ahmadruizhakeem3482 Рік тому +1

    Underrated channel. Great explanation for a newie home mechanic to watch, learn, and understand! Thanks, Craig!

  • @SymonRudy
    @SymonRudy 7 місяців тому +2

    What a great teacher you're sir keep it up

  • @Monotaurino
    @Monotaurino 8 місяців тому +1

    This is an amazing video. I'm very visual and learning how it all works together while trying to adjust my Ural valves is priceless. Thank you for explaining it so eloquently, easy to understand. Cheers!

  • @redbaron9029
    @redbaron9029 Рік тому +5

    Precisely explained.

  • @i.fishtank
    @i.fishtank Рік тому

    Great job my friend. I have a 22 year old Peugeot 206 1.4i which has had a persistent misfire (P0200 and P0300) for several months (I have not driven it), I have replaced the sparks, the fuel injectors, the coil pack, the knock sensor, the camshaft sensor, done compression tests, tested the continuity and voltages across the ignition circuit, I have just replace the timing and drive belts (they were old anyway) and all that I have left is the valve clearances...I do get an occasional 'ping' during a misfire so I'm pretty confident it's the valves after watching this video....

    • @i.fishtank
      @i.fishtank Рік тому

      I should add the P0200 was fixed by replacing the knock sensor...... it had cracked wide open.... was the original 2001 sensor.

  • @jx2794
    @jx2794 8 місяців тому +1

    This is a wonderful. So clear and concise. Very academic in presentation and explanation.

  • @changaaleikum2954
    @changaaleikum2954 4 місяці тому +1

    Great video, i finally understood how it works. thanks.

  • @1StopMotorClub
    @1StopMotorClub Рік тому +1

    There aren't many folks like you mate, just aren't. This is a class A rating masterpiece. I won't say much let me enjoy your thread of videos.
    Hishia, Africa - Zimbabwe.

    • @TheRepairSpecialist
      @TheRepairSpecialist  Рік тому

      Wow. Thank you for the awesome feedback. I really appreciate it. Craig 👍👍👍

  • @RamGaneshapillai-uq6ld
    @RamGaneshapillai-uq6ld 7 місяців тому

    Best one, I shall recommend to anyone need it.
    Thank you for the post.
    I would give you 100%

  • @andrewfordpics
    @andrewfordpics Рік тому +1

    Very well done video, now i understand how to set my lawn tractor valve clearance... Keep up the good video educational work !!!

    • @TheRepairSpecialist
      @TheRepairSpecialist  Рік тому

      Thank you so much for your kind feedback. I’m really pleased you can now set your value clearances. Craig

  • @100vg
    @100vg Рік тому +1

    What a great detailed explanation of what too loose and too tight valve gap adjustments do! I knew they needed to both be correct, but now I know why and the consequences. For your adjustment procedure, I know this was just for explanation, but you didn't mention loosening the adjustment locking screws before adjustment, tightening them after and double checking that the adjustment did not alter from tightening them enough to make a difference. Potentially, anyone who sees this for the first time could do it wrong and have an issue shortly after. You know I love your work, but I just wanted to point that out, as I'm sure others have as well. I hope you don't get bombarded too badly over it. Mine is meant as a friendly comment. Thanks for the detailed explanation, Mr. Craig. Always so informative, detailed and the arrows really help.

    • @TheRepairSpecialist
      @TheRepairSpecialist  Рік тому

      Thank you so much. I always appreciate your kind feedback. Craig 👍👍

  • @childofgod5115
    @childofgod5115 11 місяців тому +1

    Thanks for sharing your knowledge! Great video I’m working on a dead 4 wheeler think it jumped time so I’ve been playing with the timing and was getting tdc but wasn’t sure it was on the compression stroke now I do thank you!

  • @brianwood5220
    @brianwood5220 Рік тому +1

    That was one of the best explanations I've ever heard. Brilliant. Thanks for sharing.

  • @enforcementofficer4802
    @enforcementofficer4802 5 місяців тому

    Brilliant video , I finally now understand how it all works, thanks for posting 😊

  • @MwangoWilbroad
    @MwangoWilbroad 7 місяців тому +1

    You are a very good teacher.
    So insightful!❤

  • @oliverklozhoff
    @oliverklozhoff 5 місяців тому +1

    Great video, gf was asking questions that i couldn't explain very well. Your concise and thorough video (and that cutaway engine) made everything crystal clear. Thank u kindly sir! Instant sub!

  • @brownclorox
    @brownclorox 5 місяців тому +1

    Amazing video. So much good information. The engine cutout was extremely helpful to visualize what is going on. Bravo!

  • @arthurfricchione8119
    @arthurfricchione8119 Рік тому +3

    Craig another outstanding video with an excellent overview of how the internal 4 stroke engine works. Great job👍Artie

    • @TheRepairSpecialist
      @TheRepairSpecialist  Рік тому

      Thank you Artie. I alway appreciate your kind feedback. Craig 👍👍

  • @metheewatchakittikorn4796
    @metheewatchakittikorn4796 Рік тому +2

    Great information.
    I'd like to see how you do valve job too.

  • @sfarnam9
    @sfarnam9 7 місяців тому

    Thank you for such a great explanation of adjusting valves! Well done!!

  • @toshibahomeschool5704
    @toshibahomeschool5704 Рік тому +1

    Probably the best ever vid on valves?

  • @curtthedirt1969
    @curtthedirt1969 7 місяців тому

    Very easy to follow!! Thank you for taking the time to make this video.

  • @carlosgomes6074
    @carlosgomes6074 3 місяці тому +1

    Thank you, very clearly and well explained,love it.

    • @TheRepairSpecialist
      @TheRepairSpecialist  3 місяці тому +1

      Thank you so much. I really appreciate it. Craig 👍👍

  • @Goodellsam
    @Goodellsam 2 місяці тому

    Excellent demonstration

  • @IfeanyiPeter-jl6dm
    @IfeanyiPeter-jl6dm 7 місяців тому

    Wow the title of this video is true thanks for making the video

  • @MilesDaffin
    @MilesDaffin 11 місяців тому

    Excellent. And if the valve gaps are correct and there is still poor compression it means that you have other problems, such as damage to the valves as you describe. (Hope that's not so in my case, but I guess you may have another video covering that :) )

  • @leeanncotrone8369
    @leeanncotrone8369 4 місяці тому +1

    Love this love to learn more about engines this was fun watching learning new thing I never knew about a car engine ❤🎉😊👍

    • @TheRepairSpecialist
      @TheRepairSpecialist  4 місяці тому

      Awesome. Thank you for watching and for your kind feedback. Craig 👍👍👍

  • @langsor
    @langsor 5 місяців тому +1

    Excellent explanation. Thank you for the content.

  • @monkeytheo
    @monkeytheo 7 місяців тому

    Brilliant explanation. It cannot be made any better.

  • @robertasjasas4851
    @robertasjasas4851 Рік тому +1

    Hi! I've been following your channel for a few years now. I do small engine repair work in Lithuania. I'm learning from my father who is an experienced repair specialist. I rely on your videos for the theoretical part of the job as many situations I encounter seem like magic if explained with no theory and only by experience and observations. I couldn't wrap my head around the saying that valves 'burn out' if the clearances are too tight. I have observed it, but couldn't figure out the cause. The same goes for the problems explained in your ignition coil videos. Thank you!
    Have you got experience working on ridable mowers and their electrical components? I still struggle with troubleshooting that

  • @neverclevernorwitty7821
    @neverclevernorwitty7821 Рік тому +1

    This was really brilliant, excellent job!

  • @salmantalash4515
    @salmantalash4515 Рік тому +1

    you are a genius man i have a bike gs150 and it has 133000km on it my tapped sounds like tik tik and now i adjust tapped according to the theory you present and my bike engine is running smoothly and acceleration like boom on 2nd gear the wheely happens you are genius bro 👍👍👍👍👍👍👍👍👍👍🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹

  • @WillOldfield-tu3eg
    @WillOldfield-tu3eg 7 місяців тому +1

    Awesome video. Great job explaining valve lash!

  • @DethBy3ToeSloth
    @DethBy3ToeSloth Рік тому +1

    Very thorough. Thank you!

  • @Taruup
    @Taruup Рік тому

    By far the best explanation I have seen. Thank you very much 😊

    • @TheRepairSpecialist
      @TheRepairSpecialist  Рік тому

      Thank you so much for your generous words! 😄 I'm absolutely delighted to hear that you found my explanation on 4-stroke valving to be the best you've come across. Your appreciation means a lot to me, and I'm here to provide more insights and explanations whenever you need them. Keep that curiosity alive, and I'm grateful for your support! Craig

  • @marcusscott9800
    @marcusscott9800 Рік тому +1

    Thank you so much for your crystal clear explanations, I have learned so much from your videos. Keep up the great work:)

  • @nickandrews29
    @nickandrews29 Рік тому +1

    Great tuition Video, Keep up the good work

  • @joncorklin
    @joncorklin Рік тому +1

    This is a great explanation.

  • @goutams4438
    @goutams4438 Рік тому +1

    It's very useful tips thank u

  • @shaggyda2758
    @shaggyda2758 Рік тому

    Great job! another great video for , all of us to view. I only wish I would have had those video's when I was 14-15 yrs & just getting into small engines, those video's & your information would have made A World of help for me. Keep them coming.

    • @TheRepairSpecialist
      @TheRepairSpecialist  Рік тому

      Thank you very much! I really appreciate your support. Craig 👍👍

  • @normandboucher4930
    @normandboucher4930 Рік тому +1

    Wow thank you so much very interesting and educational 👍

  • @187bootlegfm4
    @187bootlegfm4 Рік тому +1

    thank u sir was waiting for this ,you made it so easy to learn

  • @kevinvanderlei3271
    @kevinvanderlei3271 Рік тому +1

    Excellent video, thank you!

  • @tylersen3318
    @tylersen3318 Рік тому

    Just the right amount of information and an outstanding format for learning 👍

    • @TheRepairSpecialist
      @TheRepairSpecialist  Рік тому

      Thank so much. I really appreciate your kind feedback. Craig 👍👍👍

  • @Deladavid2
    @Deladavid2 4 місяці тому +1

    Thank you very much Master

  • @artderamo8053
    @artderamo8053 Рік тому +1

    Great video!!! Now do I set the clearance on both valves on the compression stroke,? Thanks again!!!

  • @bchrisl1491
    @bchrisl1491 Рік тому

    That was a very good instruction. I would like to add, because I got fooled once, that Briggs and Stratton Vanguard engines in the US call for an indicator stick, and they specify 1/4”
    lower after TDC on compression as the set point. I’m not sure why, but that’s their spec.

    • @TheRepairSpecialist
      @TheRepairSpecialist  Рік тому

      Great tip!

    • @bchrisl1491
      @bchrisl1491 Рік тому

      I use a multimeter with a “frequency” function to set idle speed. Put an antenna on the positive input terminal, place the antenna just close enough to the spark plug wire to get a reading, not too close.
      i.e: 1000 RPM= 16 2/3 RPS, or 17 hertz (rounded up). This assumes a lost spark system, whereas a distributor spark would be half that. Ok last Heloise Hint, don’t want to be a pest, but just to give back a token to repay all I have gleaned from watching your videos.

  • @davidruiz5383
    @davidruiz5383 7 місяців тому

    Thanks for your teaching. Had no idea how it works. Question: is having the piston to its highest position is what matters to start adjustment. Correct if wrong. Again thanks and Gob Bless.

  • @grantbellinger7403
    @grantbellinger7403 Рік тому +1

    Beautiful matey,Absolutely Terrific!,good onya cob,thank you!

  • @delynnaddams8774
    @delynnaddams8774 11 місяців тому +1

    How can you til if the valves should be offset when manual shows either or or doesn't say?
    Like .004 to .008 intake & .006-.008 exhaust. Or mfg manual says .004-.006 inch on both.
    But doesn't say if it should be offset for a 208cc generator.
    I only hear offset the valves from the technicians by example of operation.
    So offset or not?

  • @SPACEMIKEB
    @SPACEMIKEB Рік тому +1

    Hi Craig, best explanation I've seen!

  • @jesussantibanez6711
    @jesussantibanez6711 Рік тому

    Thank you for sharing great video 👍👍👍👍

  • @BobChanter
    @BobChanter 7 місяців тому +1

    Excellent video!!

  • @SymonRudy
    @SymonRudy Рік тому +1

    You're the best teacher

  • @mannysfood
    @mannysfood 8 місяців тому +1

    Mr good simple description

  • @emekaenwerem861
    @emekaenwerem861 7 місяців тому

    Great illustration👍

  • @adnacraigo6590
    @adnacraigo6590 Рік тому +1

    Fantastic explanation.

  • @nedasbertasius2008
    @nedasbertasius2008 Рік тому +1

    purfect explained and showed

  • @marilynarce7223
    @marilynarce7223 Рік тому

    Muy buena esplicacion gracias Good explanation thanks

    • @TheRepairSpecialist
      @TheRepairSpecialist  Рік тому

      Thank you very much for your kind feedback. I really appreciate it. Craig 👍👍👍

  • @mveno123
    @mveno123 Рік тому +1

    Excellent explanation, very helpful. I just subscribed for more content. Thank you.

  • @amponsa8123
    @amponsa8123 11 місяців тому +1

    Very well illustrated, ❤❤❤😊

  • @shredder60
    @shredder60 Рік тому +1

    Just the video I wanted to see

  • @alpha1656
    @alpha1656 Рік тому +1

    Excellent video

  • @transmitterguy478
    @transmitterguy478 Рік тому

    Great video Craig. I have always wondered why they went to the overhead valves. These engines having more parts seem to have more problems. I have a Techumse flat head on my 1974 Sears Rototiller and I run it every year 5 or 6 times, drain the gas from the carb, and put it away. The flat head seems like a more reliable engine. If you would, compare the flat head to your model here and note the differences between engines. Thanks

    • @TheRepairSpecialist
      @TheRepairSpecialist  Рік тому

      First of all, thank you for your kind feedback. I really appreciate it. And yes, you have given me a very good idea for a near future vid. I do have a flat engine somewhere in my pile of engines. I will pick out one and do a vid on the comparison, just as you said. I do have a list of a few vids to get through first but I will get round to then. Thanks again. Craig 👍👍👍

    • @cravenmoorehead5636
      @cravenmoorehead5636 Рік тому

      I love my flatheads, FLATHEADS FOREVER. But the OHV engine is better in practically every way possibe. Yes it sucks to admit it but it is no contest. Unfortunalty

  • @seafoodmonster3060
    @seafoodmonster3060 Рік тому +1

    Great video. Thanks!

  • @walterpidgeon9572
    @walterpidgeon9572 Рік тому

    Good lesson, but I wonder how to find the TDC in a multicylinder diesel engine fitted with prechambers and not externally marked with some indication.

  • @nutlangsworld
    @nutlangsworld Рік тому

    Great video and explanation; thank you very much. I tried to set the valves on my 250 (OHV motor) and there was no way I could loosen the valve adjusting locking nuts.. They just would not loosen... I was afraid I might strip them... The motor was on the F timing mark and both valves were closed, but even then I could not feel any "looseness" I`ve got no idea why? 😕

  • @sylviaeugeniehuber4102
    @sylviaeugeniehuber4102 8 місяців тому

    The video is very interesting. In your experience, is it possible that all 6 rocker arms on the right cylinder bank break and not a single valve is bent? Thank you for your feedback and best regards from Austria.

  • @johnsonshieh50
    @johnsonshieh50 Рік тому

    Excellent teaching!!

    • @TheRepairSpecialist
      @TheRepairSpecialist  Рік тому

      Thank you so much for your kind comment. I really appreciate it. Is your engine a small single cylinder like this? and could you tell me of any parts of the video that needed more clarification? I really appreciate your honest comments. Thanks again. Craig

  • @Maurice-c6z
    @Maurice-c6z 7 місяців тому

    Ive always tried to explain to people the value of proper clearance as valve timing, especially those owning trucks

  • @frankdoingthings8511
    @frankdoingthings8511 10 місяців тому +1

    Top video mate 👍

  • @helpmelearn1181
    @helpmelearn1181 11 місяців тому +1

    Excellent teaching moment. :)

  • @gururoyalgrow297
    @gururoyalgrow297 Місяць тому

    Great video love learn alot

  • @harrisstylianou5651
    @harrisstylianou5651 4 місяці тому

    How do we move to other pistons to adjust the valve clearance. Is not easy to turn the engine from flywheel. Can you please make a video on a real simple petrol engine so will be easier to see what we do after adjusting the first piston. And of course to show as how to turn the engine. Thank you very much for your help!!

  • @larrywilliams3858
    @larrywilliams3858 Рік тому +1

    That made my morning coffee!!!

  • @justinvictoria410
    @justinvictoria410 2 місяці тому +1

    Great video.. thanks

  • @hughdoherty2416
    @hughdoherty2416 10 місяців тому +1

    Well explained 👍👍👍👍

  • @frankvucolo6249
    @frankvucolo6249 Рік тому

    Great cut away engine! Instead of going for top dead center, I rotate the engine until one valve is completely open (on the top of the cam lobe.) This tells me the other valve is completely closed. I adjust the closed valve, rotate until that one is completely open and adjust the other valve - which is now completely closed. This also takes the compression release mechanism out of the equation because it will not be in place with one valve completely open. I wonder if my practice is sound (it seems to be and seems to work?) So many folks do the TDC on compression thing that I wonder. Thoughts?

    • @TheRepairSpecialist
      @TheRepairSpecialist  Рік тому +1

      First of all, thank you for your kind feedback. I really appreciate it. As for the way you adjust your clearances, I also adjust the clearance this way myself. I too have never had an issue with. I find it just as accurate as the method I showed in the video. I think it’s just a case of preference really, and it seems that the more experienced mechanics among do it the way you mentioned. I think it’s also a generation thing to a degree. When I was taught how to set clearance back in the late 80’s, it seemed to be the old fashioned way of doing it. I have some old Honda engine service manuals and in them is the method you explained. I think it’s just become a little more popular in recent years to adjust them as I showed in the vid. But in my opinion your method is great 👍

  • @themowerman
    @themowerman Рік тому

    Wow this is a fantastic video... So much information.. ta mate

  • @shafeequeauto5454
    @shafeequeauto5454 4 місяці тому +1

    Very very thanks... Sir