🤔 Why Valve Clearances are VERY IMPORTANT 🤔 Tight Valves VS LOOSE Valves ticking

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[@Rossvallance]

I believe every person on earth needs teachers like you. Imagine if everyone had someone like you to explain situations explained on multiple levels. I now understand the motions, use and how valves may present themselves working and or not. Thank you

[@vegasromaniac]

I'm glad you enjoyed it

[@RealSuburbanCowboy]

This is really nicely explained. Many people have no idea what is going on inside their four stroke engine. I love the model.

[@vegasromaniac]

I was afraid I'm gonna get a kit if hate mail for that model , but people seems to like it

[@darmasayoga1525]

Couldn't agree with you more

[@professorscrim5303]

Let me guess Cowboy, you know what's going on inside your 4 stroke engine? 💀

[@RealSuburbanCowboy]

@@professorscrim5303 after many years of working on engines and reading books about them, yes, I know what's going on inside 4 stroke AND 2 stroke AND Rotary engines.

[@professorscrim5303]

@@RealSuburbanCowboy Never would of guessed...

[@yukonjon5964]

Great job, with good model demonstration!... except for a few mistakes if you don't mind them being noted... But first, the main reason to limit valve lash is because a valve with excessively loose clearances will not be pushed open far enough by the cam to flow the amount of air required for full power. The result would be the same if the cam lobes were worn down. Now for the mistakes. While you did admit that tight valve clearances will prevent the valve from sealing properly at the seat, you said at 4:58 that it will "not create any damage to the motor." Wrong. Tight valves are far more damaging than loose valves because the seats will quickly become burned and ruined due to being held open during combustion (especially in diesels). The hot gasses pass through the gap, overheat and erode the seats. On the flip side, at 7:20, you said that a valve that is only "resting on its seat" in the head and not on the cam, is a problem. You said that the springs will place all their force into pulling the valve into its seat, and this will cause the valve and seat to wear prematurely. Sorry, but this is completely false. The springs pulling the valve into its seat completely every time it closes, is the only way a valve system can work properly. The valve and seat wear is part of the design. OEM's have found that if they make the valves too hard so they don't wear, they just break. Intake valves are normally softer than exhaust valves though, so the intake valves will sink into the head sooner and the intake lash will the first to get too tight. Having "a loose gap" as you say, is not one of the worst things for your engine and it will not increase valve and seat wear. The only thing you can do to prevent valve wear is to make sure your thermostat is working ok and at the highest temp range allowed by the OEM. This will keep heat levels up and dissipate carbon. Carbon is what wears out the valve guides, which in turn causes premature valve and seat wear, because the valves wobble around at odd angles in the seat. Yes, loose tappets are what makes that rattling noise under deacceleration and this needs to be corrected by adjusting the valves, but it is not as bad as tight valves. Loose tappet noise should not be confused with detonation rattle which will be during acceleration. Next, you reiterate the whole flawed theory of the cam needing to contact the tappet at all times by referencing a very small problem and making it out to be a large problem; that is, valve lash causing tappet and valve stem wear from the bucket being too loose. Yes it is true that valve components are more easily harmed by excessive valve lash and the hammering effect of any bucket movement beyond clearance spec, but the fact is, that there must always be some movement there. In other words, the wear you mentioned is always happening even when the clearances are set to spec. It is just easier for bucket-float to exasperate the hammering effect when the lash is excessive. There will be an increase in the wear rate like a hammer smashing a nail, as you rightly said, but you cannot get rid of that motion or you will have the much worse issue of burnt valve seats from the valve not fully seating. Keep in mind almost all these principles are the same with the the adjustable rocker and push-rod engines as well. Lastly, while it's true that cold engine spec clearances are designed to account for the expanding metallurgy in a hot motor, the gaps are not completely taken up by the temp changes. Some proof that the lash never gets completely tight when hot can be seen in this: many engine manuals list the valve setting specs for a hot engine, as well as a cold engine, and those specs are only slightly different from each other. There is always still plenty of gap, even with a hot engine in operation, so that may simply be another misunderstanding. Also, no one should confuse the above system with hydraulic lifters. They do indeed always place some pressure on the cam or rocker, thus there is no lash clearance and no adjustment needed. However, when the cam profile is not in position to move the valve, the oil pressure in the lifter is never more than the valve spring force. The valve always fully seats in the head properly as mentioned above. Thus the lifter system is just slightly different. Thanks for reading.

[@vegasromaniac]

Great points

[@yukonjon5964]

@@vegasromaniac Thank you. Great job on the riding videos. Keep up the good work!

[@blackyboi2885]

wow....your smart. thanks for your super long instruction. you need do videos your ownself too.. now i know even more about ny 79 gs850g suzuki and its rattling jangling sounds coming from my engine. i think worn valves will also cause back firing especially with new extra non stock free flow exhaust pipes

[@SimplyElectronicsOfficial]

Although your explanation is perfect. The saying has always been that loose valves are better than tight valves because tight valves can be bent due to excess forces and loose valves are less detrimental.

[@user-xw4hn7lb3x]

So many veteran mechanics have no clue why there needs to be a gap. Thermal expansion. Congrats to you for knowing how valve gaps really work.

[@vegasromaniac]

Thanks for the kind words ...

[@rusdibaik1891]

For my small motocycle 150cc (130k km milege) the factory value is 0.10 in & 0.15 ex but its to loose & produce noisy sound from the head, so i just do 0.5 in & 0.10 ex, the noise go away but i feel the engine loose some compression & power…where the wrong have i done? Shud i go more tighter clearance for in as 0.03 and 0.06 for ex?

[@bigchief4044]

Awesome video. Even my 2stroke brain was able to understand that.

[@vegasromaniac]

That's why I o worked a whole day for that wood model..

[@jacobquaysonjnr5061]

2 stroke brain???? lol

[@neilharvey94]

Best description of valve clearances I've found. Like the three bears, not too big, not too small, just right.

[@vegasromaniac]

Glad you liked it

[@vytautaslegrandas6811]

Great explanation! My 2001 honda cbr 600 f4i really needs valve adjustment. Very hard cold starts. Currently 24k miles.

[@doctorhelicopter]

It's not really enough milage. Have you checked compression? Lots of people do more harm than good changing shims. Heads 'grow' as they heat up. A new valve train is always gonna be better than adjustment

[@docsamson2299]

Thank you for taking the time to do this! I'm in the middle of re-shimming my F4i and this really helped me understand exactly what is happening with the engine and why. Your comment about Honda was spot on! Almost all of mine were tight...

[@vegasromaniac]

Awesome man, glad it helped you out

[@glenc4173]

You made a good visual representation of why valve clearance checks and adjustments are very important. I hope those that think valve clearance is not important find your video. Valve clearance adjustment is one of the first maintenance items I do on any new to me motorcycle.

[@travisdonley8768]

Great video. One caveat to potentially add is I've read that tight valves can sometimes be a huge problem with exhaust valves, because they get much hotter than intake valves, and dissipate most of their heat when they contact the valve seat, so there's the potential to burn exhaust valves if they don't fully close. Not sure if this happens much on motorcycles or not, but it could be a factor.

[@vegasromaniac]

Good to know

[@sercio994]

This is so clear to understand, it's just amazing. Thank you!

[@karysashair4728]

This was the best visual demonstration I’ve ever seen

[@gabriellynn4418]

This is an awesome explanation and it helped me to better understand exactly what's going on with valves and shims. The model helped out a lot too! Thanks!

[@vegasromaniac]

Thanks for watching, glad it worked

[@downtofun]

I really appreciae this demonstration. This is helping me to understand my motorcycle top end. Thanks very much!

[@easternyellowjacket276]

This is absolutely the best explanation on valves I've seen. Thank you!!

[@WILLY52368]

The best explanation of how valves work I ever came across that I can follow and understand, great job bro

[@vegasromaniac]

Happy to have you here

[@bananafoneable]

HOLY CRAP thank you for explaining this with these descriptions. When my engine gets hot, the engine started ticking LOUDLY. Adjusting the valve clearance did the trick!

[@vegasromaniac]

Awesome

[@Alexnikpo]

Thanks for the explanation, I've had some advice to only change the oil and leave the valves. But today I've checked and aligned my exhaust valve because it was a little tight.

[@vegasromaniac]

Awesome

[@brendonchase9460]

That was a great presentation and description of shim function and why taping noice happens. Awesome demonstration

[@blackyboi2885]

you are a fantastic instructor. i have a 1979 gs850 suzuki ..it has some weird part rattle part jangling sound coming from the engine...i am sure it is the valves needing adjustments [shim changing] . but now i realize what all is going on and and the urgency of fixing thie cause of this warning sound. thanks a billion

[@Operaatoors]

This is the best explanation I've ever got! So - no more questions - whats the difference between 0.15 or 0.25, who cares... If the manufacturer said it has to be IN 0.15 and EX 0.20 it has to be like that! If not - expect motor not starting (this is the best scenario, because it just prevents owner to kill the motor) if gap is too low, or if rattling noise - turn off your bike immediately and make clearence lower!

[@GordonTremeshko]

I have been looking for so long! so many videos of people trying to explain it but they use actual motorcycle engine in the video. This doesn’t help me understand what is happening. Your model has helped immensely and I have so grateful you took the time to put it all together and explain everything fully. I just bought a honda and like you said, the exhaust valves are too tight. (spec for .011”, it is currently at .004”). I have never replaced a shim before, so I am anxious about doing it. Because of your video, I understand how important it is to have the correct clearances. I look forward to your other videos.

[@wainedodd8055]

I went from the Darkness in to the Light with that one 👍

[@keensey5370]

I already knew this, but this video explains it so well that I will recommend it to friends or acquaintances who need to learn. Congratulations!

[@lin018]

Same issue. I corrected mine with proper torqued spark plugs. This fix high engine temperature issue and die with throttle when bike is hot.

[@ahmedshadan8912]

Very well explained. Finally understood what’s happening with my bike. Thanks a bunch.

[@vegasromaniac]

Awesome

[@emekaenwerem861]

Fantastic illustration, well-done 👍

[@Ghost-mm9kc]

VERY VERY well explained, that was a great way to explain that. great job

[@SamuraiR31]

Thank you! I never understood this until watching your video.

[@vegasromaniac]

Glaf it helped

[@jowarnis]

This is probably the best explanation about valve clearances on the internet :D

[@vegasromaniac]

I'm glad you liked it

[@endurodz]

good work, now the 2 stroke guys can understand..

[@vegasromaniac]

Or the people that fear 4 stroke because of that..

[@alponching002]

Thank you for making this video. Now I appreciate the necessity of adjustment even more.

[@Guitarooster52]

Excellent presentation. I understand it much better now. Thanks

[@IceBoNeZ]

There are also adjustable vavles which don't have shims, but have adjusting screws instead, to adjust & maintain correct cold clearance. But this was a great vid! Makes it so much easier to understand, thanks for posting it! 👍

[@vegasromaniac]

Yeah I like shims better . To be honest.. More precise

[@IceBoNeZ]

@@vegasromaniac, Bit hard when your bike does't have the option of using shims though..lol

[@CoachSteve4u]

Awesome video for explaining what shims do and how it works. I now understand!

[@delickxn]

Now i understand what my mechanic is saying hahah thank you!

[@vegasromaniac]

Glad you liked it .

[@alexicon_]

masterful explanation. thank you kindly!!

[@andrejsarevski2518]

Hats down, this is the best way that you can explain this component on a motorcycle. \m/

[@vegasromaniac]

Happy I was of help

[@robertstimmel1100]

This was a great explanation! Thank you!

[@mascaralinium2866]

Awesome! This is the one of the best and very excellent way of demonstration i ever seen like this. You are a genius & i just love it. Well done! I highly appreciate your exceptional ability & thinking this idea behind tappet/valve clearance. Thank you so very much for all this explanation & visualization.

[@vegasromaniac]

Awesome thanks for watching

[@cletuskaunda5665]

Good explanation and easy to understand,God bless u.

[@roninanglers]

Great vid bro! I've been trying to understand this valve stuff. Now I know why I'm hearing the noises I'm hearing. Thanks! 🤙🏿🙏🏿👌🏿

[@saiashish8802]

Bro really loved it. We have in India the Yamaha Fz 25, 250 cc xt 250 engine. All users report coin rattling noise from engine. And it's said that it is caused by tappets. Yamaha set the tappets in such a way that make noise but manage engine heat better. It's the character of the engine, but majority riders don't like it

[@vegasromaniac]

Good to know..

[@steelcitycaprice.899]

👀👂🤛🏾 awesome teaching...I learned valuable information. 🏁🏁🏁🏁

[@Therealchrist]

This is an amazing video, thanks very much for making it!

[@Rob-id3zf]

the crazy model is great!

[@kuriandungu6876]

Thank you, never understood how that worked until now.

[@Tipman2OOO]

Thanks for making this. Made it clear as day to me!

[@omerwaqar7910]

just explained perfectly. thank you for the efforts ❤

[@BaNZFall]

That wooden model is spectacular superb in it's awesomeness.

[@circlepfarm9729]

Such a great video! Thank you so much for passing on this knowledge!!!

[@johnafamasaga9310]

Thanks Bruh awesome 3d modelling and explanation first class 😎

[@TylorBennett]

Very nice explanation. Thank you so much for putting this together. Makes complete sense.

[@jerosalva2510]

Thank you very much for all your videos. I have a hard time comprehending the manual, but your explanations always make sense to me and make working on my bike less intimidating. Thank u again

[@TheWolvesCurse]

found your channel through the commentsection of "The Workshop". great video, i'll look into more of your content.

[@vegasromaniac]

Yeah great guy, him and I we had a little debucle a while back was fun. Thanks for watching

[@stephbigue]

Amazing explanation. Thank you

[@thijstig]

Thank you so much for explaining so clearly. This video is awesome!

[@onetwotwo9848]

If I take your theory of a wide gap closing down with heat expansion, then the ticking should go away being a more tighter gap. But if I widen the gap, the tick goes away. Where I tighten the gap past the blueprinted center number it ticks. Go play with the valve gap and learn the hard way when the tick kicks in. Signed, NOLTT (no one listens to turtle).

[@Mobiphix_technologies]

I understand this better than my mechanic,all the time after setting the tapets there's a ticking noise which end up beding the valves

[@stefanhansen5882]

This explanation was masterful! Only one question: Why even have a shim, instead of simply a longer valve stem? Does the valve stem and/or shim shorten with use? Thanks!

[@ianglynwilliams]

Pretty well explained... thanks. For even better understanding try using “this can be demonstrated by... “ rather than “this is achieved by...”.

[@JeffersonCasavant]

Dude. Excellent video. I just updated the valve clearance on my bike to the manufacturer specs, and I had a couple that were pretty far out - but the motor is noisier now that that's corrected. I'll have to go for a short ride and then listen after it's warm. Great explanation, really helped me in figuring out what's going on.

[@vegasromaniac]

Make sure you released the tensioner properly, the KTM has a pretty poor design on the tensioner that makes clucking noises , not sure what bike you have

[@JeffersonCasavant]

@@vegasromaniac I'm on an 08 VStar 1100. The Clymer manual I've got - and the wiki, so great to have a bike with a wiki - suggest removing 4 covers and adjusting the screws on the tappet arm to control the clearance. I don't think I've got any other adjustment points available to me. If the noise keeps up after a couple warm-up/cool-down cycles I'll start digging in.

[@krotchlickmeugh627]

@@JeffersonCasavant loose valves will make more noise. This is a good thing as long as your clearances are within spec its perfectly normal

[@yoboo6167]

Great video. Good info and descriptions!

[@vegasromaniac]

Tha KS for watching

[@JayDeeFrm7400]

This is a genius explanation

[@vegasromaniac]

Thanks for watching

[@workingman1791]

Great video.thank you for your time

[@njmxjunkie3128]

Such a great video and visual. Thank you and I wish more people watch this.

[@vegasromaniac]

Thanks you for watching and appreciating my work

[@shaynebrown131]

Awesome video man, thank you

[@viajarMOTO]

Awesome description! Thanks for putting this together and explaining this for us who a visual learners. Brilliant!

[@vegasromaniac]

Glad to have you on this channel

[@velociaIN4944]

best explanation that I've ever heard

[@vegasromaniac]

Glad you liked it ...

[@mikestockdale808]

I recently shimmed my 2017 CRF250R, and I went on the high side of the spec clearance. I think I went a little to loose, because I am getting some audible ticking noise for the valve train. I only ran it for a few hours, so I doubt it did any damage, but after seeing this I am going to open it back up and shim them tighter.

[@vegasromaniac]

Also check timing chain and tensioner .. sound can happen there

[@mikestockdale808]

@@vegasromaniac Yea, the tensioner seemed to be in perfect shape when I removed it. I have also watched a video of the noise from a bad tensioner, and that sounded different. Ill keep it in consideration if reshiming doesn't resolve the issue.

[@clintbeastwood3311]

Thank you! Extremely informative!

[@raredesign]

Excellent video!! You’re a great teacher.

[@vegasromaniac]

I still struggle with the language but I think I've done a pretty good job maybe that's why I'm a good teacher because I don't use main terminology and just keep

[@raredesign]

@@vegasromaniac You speak English well; far better than I speak Romanian. :)

[@Jdmsti]

Brilliant explanation 👍

[@territodude]

Thanks, it makes sense to me and was helpful, appreciate it! It's much easier to understand with visuals like this as well.

[@ehiggins7476]

Brilliant explanation. Thank you!

[@AaronMartinCOOLVIDEO]

Nice job maniac you did a pretty masterful job explaining this all of you kids out there that's never touched a valve in your life pay attention because this is how it actually works.☺👍🔧

[@vegasromaniac]

Yep I'll answer questions on my next videos on this model

[@codyjones3990]

Did an awesome job explaining that bravo 🤗

[@vegasromaniac]

Thank you

[@lazmartinez1605]

Best explanation I have even seen

[@vegasromaniac]

Thanks

[@budgetprojectsbydavid5263]

Very nicely done. I am working on a Kawasaki Mule that has very tight valve clearance and very poor compression. I can't wait to see if I can get the old girl to start, once I set the valves back to spec. Thanks for the very clear explanation!

[@krotchlickmeugh627]

Depends on the year kawi you have some mules arent shim under bucket

[@hawk5504]

Excellent demonstration

[@vegasromaniac]

Glad it was helpful!

[@jasonmurray219]

Excellent info! Nicely explained!

[@vegasromaniac]

Glad you guys liked it

[@Willsmith-qh4hy]

Amazing vid mate

[@jtrev2460]

Excellent explanation, many thanks 👍

[@vegasromaniac]

Glad you liked it

[@tycoontobias8741]

A superb and thouroughly explained video - thank you very much. Have a great day.!

[@g.simard854]

Nicely explained for people Who have no knowledge in engine mechanics ! Nice job

[@g.simard854]

Recently bought a blown bike because of that reason valve has been adjusted way to tight, the exhaust valve knock on the piston than snap then punch a Hole on the piston... Realy Nice job the Cam was eaten has well

[@DocHoliday-to6kp]

THANK YOU.. Well Done.

[@tuskenridertv2678]

Really well explained!!! Thanks!!

[@vegasromaniac]

Glad you liked it

[@xawerymeloman3254]

Veeeery gooood explanation 🙂 Thank you.

[@reidspeed77]

👌🌝brilliant work ,,really bringing home the danger of lose valves ,,,

[@vegasromaniac]

Glad you liked it

[@eyeperture]

Replacing the shim with spring coil? Maybe! Just a wild thought. After watching tons of vids on valve adjustments. I start to feel this shim thing can be replaced with spring (certain lb/in).

[@Shellshock361]

The best explanation I've seen on this. Checking my valves!

[@vegasromaniac]

Awesome

[@Wilberon_McBane]

An absolutely superb explaination using a really cool and simple model! Thank you so much! 😎👍

[@vegasromaniac]

Thanks for watching

[@GD-sc5se]

good job on video..i understand more than i ever have..i think my r1 has loose valves

[@vegasromaniac]

Yeha always check the valves...

[@Mickey_Bauer]

Amazing, thank you!

[@letsride4199]

Epic Video Man! Thanks for taking the time and making the model :)

[@vegasromaniac]

Awesome thanks for watching

[@scalecraft4663]

Best Explanation and display so far. i'll do my cbr 250r now. thank you

[@hajyoussefamine8304]

Perfect explanation

[@alexandrudinca3080]

Foarte misto explicat!

[@vegasromaniac]

Mă bucur că tzia plăcut

[@RyanRussell885]

This is amazing!