Setting valves on YM2000

[Djames55]

LOL old Timers are NEVER wrong... I just got back from his shop and he said you were wrong... LOL you been doing it wrong all these years... So now what? He said, he don't know what it is with you California people... Was it lack of water or scattered brained from the earth quakes?

 

[California]

LOL old Timers are NEVER wrong... I just got back from his shop and he said you were wrong... LOL you been doing it wrong all these years... So now what? He said, he don't know what it is with you California people... Was it lack of water or scattered brained from the earth quakes?

So in your original post you declared advice you don't understand yourself, just posted something wrong that you misunderstood from what a pro told you? That's not helping anybody.

I don't think you have the brains to comprehend what he told you. So you posted the opposite of what that old pro told you. Or told him the opposite of what this Californian described and got him all riled up.

To understand this you have to think through where the cam lobes are at each point in the revolution of the crank. You do understand I hope that the exhaust valve starts to open about when the crank reaches the bottom after firing, then closes as it reaches the top of that 'off' (nonfiring) cycle. Then as the piston starts down again the intake opens until the crank reaches the bottom.

Adjusting either lifter at the point where exhaust is just closing and intake just opening, what you said, is just boneheaded wrong. I hope you understand that those two moments are in practical terms at about the same point in the four cycles, at TDC on the off stroke. It's the point in the four cycles where both lifters may be on the ramp portion of their cam lobes! That's not where you adjust valve clearance.

Draw yourself some pictures if you can't visualize this in your mind. Maybe you'll begin to understand and won't have to go running back to that guy you didn't listen to for another lesson.

And smearing a whole group of people with stereotypes is never good form. This tells more about you, than about what you thought you were saying.

 

[R Barger]

It seems to me Yanmar paid a lot of money for some engineer to tell them the proper way to adjust the valves,so why not do it the way the repair manual says.

 

[normde2001]

Duh, how can there be a wrong way to adjust valves? They are either adjusted or they are not. I go for the easiest/quickest way, crank til push rod is max loose then nail it.

 

[kenmac]

https://www.youtube.com/watch?v=3gMYWLMAzao