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

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TheRepairSpecialist

TheRepairSpecialist

Жыл бұрын

Master Engine Valve Clearance adjustment settings and valve timing with this Valve Clearance Explained video. A Comprehensive Beginner's Guide to Engine Performance.
Any ambitious engine enthusiast must understand valve clearances. We will study the subject of valve clearances, also known as tappets, and the method of adjusting them in this thorough beginner's guide. We'll also explain how the crankshaft's rotation interacts with the movement of the rocker arms, pushrods, cam followers, and cam lobes in order to maintain proper engine operation. Prepare to increase your knowledge and advance your engine competence!
Why are valve clearances important and what are valve clearances?
Valve clearances are defined, along with the role they play in engine performance.
Investigating how improper valve clearances affect how an engine operates.
Realising the importance of valve clearances in producing the best possible power, efficiency, and durability.
Adjusting Valve Clearance: A Step-by-Step Guide
Tools and equipment needed to alter valve clearance.
determining your engine's unique valve clearance requirements.
Detailed guidelines on how to accurately and correctly modify valve clearances.
Techniques and advice for ensuring accurate adjustment and avoiding typical errors.
Crankshaft, Cam Lobes, Cam Followers, Pushrods, and Rocker Arms: The Dynamics of Engine Function
Separating the crankshaft and camshaft's connection.
investigating the role of cam lobes and how they work with cam followers.
recognising the function of pushrods and how they relate to rocker arms.
investigating the transfer of motion from rocker arms to valve opening and closing.
Optimal engine performance is achieved by coordinating valve clearances.
linking the camshaft profiles and engine designs to the valve clearances.
valve clearances and the effects of valve lift, duration, and overlap.
Adjusting valve clearances to meet performance requirements and engine upgrades.
Suggestions for preserving valve clearances over time and in various operating environments.
You can maximise the performance of your engine by mastering valve clearances and understanding how the crankshaft, cam lobes, cam followers, pushrods, and rocker arms interact. You are prepared to go off on a path of accuracy, performance, and in-depth comprehension of engine mechanics with the help of this beginner's handbook as your trusted resource. Prepare to increase your engine knowledge and release all of your passion!
For an internal combustion engine to run and operate at its best, proper valve timing must be maintained. The perfect synchronisation of the intake and exhaust valves' opening and closing with the motion of the engine's pistons is referred to as valve timing. For optimal fuel combustion, power production, and engine longevity, proper valve timing is crucial. The following factors are crucial for establishing proper valve timing on an engine.
Camshaft and Crankshaft Synchronisation: The synchronisation of the camshaft and crankshaft is the main factor in controlling valve timing. At particular times during the engine's cycle, the camshaft's lobes press on the valve lifters or followers to open and close the valves. In contrast, the pistons are raised and lowered by the rotation of the crankshaft. It's crucial that these two parts are properly aligned.
Timing Marks: The crankshaft and camshaft gears or pulleys of most engines are marked with timing marks. These markers line up when the number one cylinder's compression stroke is at top dead centre (TDC) for the engine. These marks must be properly aligned to guarantee that the valves open and close in accordance with the movement of the piston.
Timing Belt or Chain: To link the camshaft and crankshaft, many contemporary engines employ a timing belt or timing chain. To maintain precise valve timing, these parts must be in good condition and properly tensioned. Timing problems and probable engine damage might result from not replacing timing belts according to the specified schedule.
Engine manufacturers give valve timing diagrams that outline the precise timing of each valve's opening and closing in relation to the position of the piston and the crankshaft's rotation. When determining valve timing, these diagrams are an essential resource.
Variable Valve Timing (VVT): Some engines have systems that allow them to adjust the timing of the valves in response to changes in engine speed and load. These systems improve emissions control, fuel efficiency, and performance. The proper operation of VVT components must be guaranteed.
Many thanks
Craig (Owner and Creator of The Repair Specialist Channel)
#ValveAdjustment
#TappetClearance
#EngineMaintenance
#DIYMechanic
#BeginnersGuide
#EngineTuning
#AutomotiveTips
#ValveClearanceAdjustment
#EnginePerformance
#TappetSetting
#ValveMaintenance
#EngineRepair
#MechanicalSkills
#CarMaintenance
#EngineFunction
#valve timing
#set tappets

Пікірлер: 192
@TheRepairSpecialist
@TheRepairSpecialist 11 ай бұрын
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 7 ай бұрын
I just understood something I haven't understood for like 29 years. Awesome video
@Brettarn
@Brettarn Жыл бұрын
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 Жыл бұрын
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.
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
I really appreciate your kind feedback. Craig 👍👍👍
@uph2011
@uph2011 10 күн бұрын
You're the engine's boss! The best explanations ever about small engines. Greetings from Colombia.
@TheRepairSpecialist
@TheRepairSpecialist 9 күн бұрын
Thank you very much! I really appreciate it. Craig 👍👍👍
@lightship-uk
@lightship-uk 21 күн бұрын
Clearly explained, easily understood, concise & accurate. A well presented tutorial.
@TheRepairSpecialist
@TheRepairSpecialist 20 күн бұрын
Thank you so much
@HankRearden84
@HankRearden84 7 ай бұрын
Mate, many thanks. Timing has always been intimidating for me. This definitely helps alleviate that fear a bit.
@williamejakita1357
@williamejakita1357 10 ай бұрын
I am an Electrical Technologist, and this video has been very helpful in understanding engines. THANKS!
@davidmills5557
@davidmills5557 Ай бұрын
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 🙏
@TheRepairSpecialist
@TheRepairSpecialist Ай бұрын
Thank you so much. Bless you to 👍👍👍
@user-bx1ev5ek5w
@user-bx1ev5ek5w 3 ай бұрын
What a great teacher you're sir keep it up
@BoostedFA
@BoostedFA 11 ай бұрын
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.
@brownclorox
@brownclorox 26 күн бұрын
Amazing video. So much good information. The engine cutout was extremely helpful to visualize what is going on. Bravo!
@TheRepairSpecialist
@TheRepairSpecialist 26 күн бұрын
Thank you so much 👍👍👍👍👍
@oliverklozhoff
@oliverklozhoff Ай бұрын
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!
@TheRepairSpecialist
@TheRepairSpecialist Ай бұрын
Awesome, thank you so much. Craig 👍👍👍
@curtthedirt1969
@curtthedirt1969 3 ай бұрын
Very easy to follow!! Thank you for taking the time to make this video.
@sfarnam9
@sfarnam9 3 ай бұрын
Thank you for such a great explanation of adjusting valves! Well done!!
@abhishektalajiya1269
@abhishektalajiya1269 7 ай бұрын
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 6 ай бұрын
Wow. Thank you so much. I really appreciate your kind and very encouraging comment. Craig 👍👍👍
@WillOldfield-tu3eg
@WillOldfield-tu3eg 3 ай бұрын
Awesome video. Great job explaining valve lash!
@seafoodmonster3060
@seafoodmonster3060 Жыл бұрын
Great video. Thanks!
@user-hl3mb3rs1r
@user-hl3mb3rs1r Жыл бұрын
Your video is very helpful for a novice and very much appreciated.
@enforcementofficer4802
@enforcementofficer4802 Ай бұрын
Brilliant video , I finally now understand how it all works, thanks for posting 😊
@DethBy3ToeSloth
@DethBy3ToeSloth Жыл бұрын
Very thorough. Thank you!
@user-cd6rv6bg7z
@user-cd6rv6bg7z 2 ай бұрын
You are a very good teacher. So insightful!❤
@RamGaneshapillai-uq6ld
@RamGaneshapillai-uq6ld 3 ай бұрын
Best one, I shall recommend to anyone need it. Thank you for the post. I would give you 100%
@childofgod5115
@childofgod5115 7 ай бұрын
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!
@kevinvanderlei3271
@kevinvanderlei3271 9 ай бұрын
Excellent video, thank you!
@ahmadruizhakeem3482
@ahmadruizhakeem3482 11 ай бұрын
Underrated channel. Great explanation for a newie home mechanic to watch, learn, and understand! Thanks, Craig!
@TheRepairSpecialist
@TheRepairSpecialist 11 ай бұрын
Awesome! Thank you! Craig
@nickandrews29
@nickandrews29 Жыл бұрын
Great tuition Video, Keep up the good work
@187bootlegfm4
@187bootlegfm4 11 ай бұрын
thank u sir was waiting for this ,you made it so easy to learn
@jx2794
@jx2794 4 ай бұрын
This is a wonderful. So clear and concise. Very academic in presentation and explanation.
@arthurfricchione8119
@arthurfricchione8119 Жыл бұрын
Craig another outstanding video with an excellent overview of how the internal 4 stroke engine works. Great job👍Artie
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
Thank you Artie. I alway appreciate your kind feedback. Craig 👍👍
@Monotaurino
@Monotaurino 4 ай бұрын
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!
@brianwood5220
@brianwood5220 Жыл бұрын
That was one of the best explanations I've ever heard. Brilliant. Thanks for sharing.
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
Wow, thanks!
@changaaleikum2954
@changaaleikum2954 15 күн бұрын
Great video, i finally understood how it works. thanks.
@monkeytheo
@monkeytheo 3 ай бұрын
Brilliant explanation. It cannot be made any better.
@ayeleraberra4338
@ayeleraberra4338 4 ай бұрын
This the first time I have learnt how an engine works clearly. Thanks for clearing my confusion. Explained professionally.
@TheRepairSpecialist
@TheRepairSpecialist 4 ай бұрын
Thank you so much for your very kind and motivating feedback. I really appreciate it. Craig 👍👍👍
@jesussantibanez6711
@jesussantibanez6711 Жыл бұрын
Thank you for sharing great video 👍👍👍👍
@neverclevernorwitty7821
@neverclevernorwitty7821 Жыл бұрын
This was really brilliant, excellent job!
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
Thank you very much! I really appreciate it. Craig 👍👍
@BobChanter
@BobChanter 3 ай бұрын
Excellent video!!
@SailingBritaly
@SailingBritaly 2 ай бұрын
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 👍
@redbaron9029
@redbaron9029 Жыл бұрын
Precisely explained.
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
Thank you so much! Craig 👍
@emekaenwerem861
@emekaenwerem861 3 ай бұрын
Great illustration👍
@benthicmarine112
@benthicmarine112 4 ай бұрын
Probably the only gold star explanation of valve clearances on KZfaq. Thank you for this content, liked and subscribed👌
@TheRepairSpecialist
@TheRepairSpecialist 4 ай бұрын
Thank you for kind and motivating feedback. I really appreciate it. Craig 👍👍👍
@frankdoingthings8511
@frankdoingthings8511 5 ай бұрын
Top video mate 👍
@tylersen3318
@tylersen3318 Жыл бұрын
Just the right amount of information and an outstanding format for learning 👍
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
Thank so much. I really appreciate your kind feedback. Craig 👍👍👍
@marcusscott9800
@marcusscott9800 10 ай бұрын
Thank you so much for your crystal clear explanations, I have learned so much from your videos. Keep up the great work:)
@TheRepairSpecialist
@TheRepairSpecialist 10 ай бұрын
You're very welcome! Thank you for your very kind feedback. Craig
@joncorklin
@joncorklin Жыл бұрын
This is a great explanation.
@TheLeadpepper
@TheLeadpepper Жыл бұрын
The best explanation so far.. Thanks..
@amponsa8123
@amponsa8123 7 ай бұрын
Very well illustrated, ❤❤❤😊
@SPACEMIKEB
@SPACEMIKEB Жыл бұрын
Hi Craig, best explanation I've seen!
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
Wow. Thank you so much. Craig 👍👍
@normandboucher4930
@normandboucher4930 Жыл бұрын
Wow thank you so much very interesting and educational 👍
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
You are very welcome Thank you
@langsor
@langsor Ай бұрын
Excellent explanation. Thank you for the content.
@TheRepairSpecialist
@TheRepairSpecialist Ай бұрын
Thank you so much 👍👍
@shaggyda2758
@shaggyda2758 Жыл бұрын
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 Жыл бұрын
Thank you very much! I really appreciate your support. Craig 👍👍
@Taruup
@Taruup 10 ай бұрын
By far the best explanation I have seen. Thank you very much 😊
@TheRepairSpecialist
@TheRepairSpecialist 10 ай бұрын
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
@alpha1656
@alpha1656 Жыл бұрын
Excellent video
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
Thank you very much!
@100vg
@100vg Жыл бұрын
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 Жыл бұрын
Thank you so much. I always appreciate your kind feedback. Craig 👍👍
@goutams4438
@goutams4438 10 ай бұрын
It's very useful tips thank u
@andrewfordpics
@andrewfordpics 9 ай бұрын
Very well done video, now i understand how to set my lawn tractor valve clearance... Keep up the good video educational work !!!
@TheRepairSpecialist
@TheRepairSpecialist 9 ай бұрын
Thank you so much for your kind feedback. I’m really pleased you can now set your value clearances. Craig
@mveno123
@mveno123 8 ай бұрын
Excellent explanation, very helpful. I just subscribed for more content. Thank you.
@TheRepairSpecialist
@TheRepairSpecialist 8 ай бұрын
Awesome, thank you do much. I really appreciate it. Craig
@johnsonshieh50
@johnsonshieh50 9 ай бұрын
Excellent teaching!!
@TheRepairSpecialist
@TheRepairSpecialist 9 ай бұрын
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
@1StopMotorClub
@1StopMotorClub 11 ай бұрын
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 11 ай бұрын
Wow. Thank you for the awesome feedback. I really appreciate it. Craig 👍👍👍
@grantbellinger7403
@grantbellinger7403 9 ай бұрын
Beautiful matey,Absolutely Terrific!,good onya cob,thank you!
@TheRepairSpecialist
@TheRepairSpecialist 9 ай бұрын
Thank you kindly, I really appreciate it. Craig
@i.fishtank
@i.fishtank 11 ай бұрын
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 11 ай бұрын
I should add the P0200 was fixed by replacing the knock sensor...... it had cracked wide open.... was the original 2001 sensor.
@toshibahomeschool5704
@toshibahomeschool5704 10 ай бұрын
Probably the best ever vid on valves?
@TheRepairSpecialist
@TheRepairSpecialist 10 ай бұрын
Wow. Thanks so much for that awesome comment. Craig
@adnacraigo6590
@adnacraigo6590 Жыл бұрын
Fantastic explanation.
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
Thank you. I really appreciate it. Craig 👍
@marilynarce7223
@marilynarce7223 Жыл бұрын
Muy buena esplicacion gracias Good explanation thanks
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
Thank you very much for your kind feedback. I really appreciate it. Craig 👍👍👍
@user-bx1ev5ek5w
@user-bx1ev5ek5w 8 ай бұрын
You're the best teacher
@TheRepairSpecialist
@TheRepairSpecialist 8 ай бұрын
Wow, thank you so much. Craig
@shredder60
@shredder60 Жыл бұрын
Just the video I wanted to see
@nedasbertasius2008
@nedasbertasius2008 10 ай бұрын
purfect explained and showed
@TheRepairSpecialist
@TheRepairSpecialist 10 ай бұрын
Thank you so much. Craig
@Deladavid2
@Deladavid2 20 күн бұрын
Thank you very much Master
@TheRepairSpecialist
@TheRepairSpecialist 20 күн бұрын
Thank you so much 👍👍👍👍
@IfeanyiPeter-jl6dm
@IfeanyiPeter-jl6dm 3 ай бұрын
Wow the title of this video is true thanks for making the video
@vernonbosshard9317
@vernonbosshard9317 11 ай бұрын
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.
@leeanncotrone8369
@leeanncotrone8369 20 күн бұрын
Love this love to learn more about engines this was fun watching learning new thing I never knew about a car engine ❤🎉😊👍
@TheRepairSpecialist
@TheRepairSpecialist 20 күн бұрын
Awesome. Thank you for watching and for your kind feedback. Craig 👍👍👍
@helpmelearn1181
@helpmelearn1181 7 ай бұрын
Excellent teaching moment. :)
@TheRepairSpecialist
@TheRepairSpecialist 7 ай бұрын
Thank you 👍👍👍
@honeyroy1956
@honeyroy1956 10 ай бұрын
Thank you.
@themowerman
@themowerman Жыл бұрын
Wow this is a fantastic video... So much information.. ta mate
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
Thanks mate. I always appreciate your kind feedback. 👍👍
@alexnuarin62
@alexnuarin62 11 ай бұрын
Excellent 👍👍👍👍👍
@TheRepairSpecialist
@TheRepairSpecialist 11 ай бұрын
Many many thanks
@florjoey6547
@florjoey6547 5 ай бұрын
Big help
@hughdoherty2416
@hughdoherty2416 6 ай бұрын
Well explained 👍👍👍👍
@TheRepairSpecialist
@TheRepairSpecialist 6 ай бұрын
Thank you 😃
@user-qi4sc1wq9t
@user-qi4sc1wq9t 4 ай бұрын
Mr good simple description
@michaelboyle3327
@michaelboyle3327 Жыл бұрын
Thanks Craig.
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
Very welcome
@jayantaghosh4184
@jayantaghosh4184 11 ай бұрын
Thanks 👍
@TheRepairSpecialist
@TheRepairSpecialist 11 ай бұрын
No problem 👍
@metheewatchakittikorn4796
@metheewatchakittikorn4796 Жыл бұрын
Great information. I'd like to see how you do valve job too.
@TheRepairSpecialist
@TheRepairSpecialist Жыл бұрын
Great suggestion!
@TheMostWanted9509
@TheMostWanted9509 9 ай бұрын
Perfect
@larrywilliams3858
@larrywilliams3858 10 ай бұрын
That made my morning coffee!!!
@TheRepairSpecialist
@TheRepairSpecialist 10 ай бұрын
Awesome 👍👍👍
@shafeequeauto5454
@shafeequeauto5454 5 күн бұрын
Very very thanks... Sir
@TheRepairSpecialist
@TheRepairSpecialist 4 күн бұрын
Thank you 👍👍
@maheralazzawi7814
@maheralazzawi7814 7 ай бұрын
very good
@TheRepairSpecialist
@TheRepairSpecialist 7 ай бұрын
Thank you! Cheers!
@abusulthan5166
@abusulthan5166 3 ай бұрын
Good vedio send more
@robertasjasas4851
@robertasjasas4851 11 ай бұрын
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
@danilo86petrovic
@danilo86petrovic 11 ай бұрын
Really detailed explenation... You forgot to say that there is a mark for top dead center on almost every engine...
@bchrisl1491
@bchrisl1491 Жыл бұрын
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 Жыл бұрын
Great tip!
@bchrisl1491
@bchrisl1491 Жыл бұрын
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.
@nutlangsworld
@nutlangsworld 11 ай бұрын
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? 😕
@billslicer3203
@billslicer3203 Жыл бұрын
Thank you from this newbe
@sparshraj_
@sparshraj_ 2 ай бұрын
wao what an explanation
@MilesDaffin
@MilesDaffin 7 ай бұрын
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 :) )
@davidruiz5383
@davidruiz5383 3 ай бұрын
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.
@transmitterguy478
@transmitterguy478 Жыл бұрын
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 Жыл бұрын
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 Жыл бұрын
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
@artderamo8053
@artderamo8053 9 ай бұрын
Great video!!! Now do I set the clearance on both valves on the compression stroke,? Thanks again!!!
@TheRepairSpecialist
@TheRepairSpecialist 9 ай бұрын
Thank you so much I really appreciate it. Craig
@mrbeanbigpeanus6875
@mrbeanbigpeanus6875 Ай бұрын
You are too much of a fvcking genius !!! Thumb up sir ….
@TheRepairSpecialist
@TheRepairSpecialist Ай бұрын
Wow, thanks!
@walterpidgeon9572
@walterpidgeon9572 Жыл бұрын
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.
@frankvucolo6249
@frankvucolo6249 Жыл бұрын
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 Жыл бұрын
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 👍
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