Quote:
Originally Posted by Flyingdoctor
Thats due to the profile of the cam acting on the cam follower (rocker arm). It needs to have a nice gentle slope to push against the valve spring to open the valve, closing it is easy as the spring helps, hence it's quick. When the valve is closed there should be a small gap between the cam follower (rocker arm) and the top of the valve. This is to allow for expansion as the engine gets hot. This is why you should check it when it's stone cold (maximum gap). Think yourself lucky you have this type of valve adjustment, bucket and shim is a whole other kettle of biscuits.
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So that means, since the rocker arm moves quick "upward" thats when the valve is closing right?
And the valve is supposed to be measured when the valve is closed, so that means I have to measure it when the rocker arm/nuts and the valve has moved to that highest position+when it feels like compression stroke (? ) (Read, highest position = when you look through the whole into the valve and rocker arms while rotating the engine those will move down and up, down=further into the engine and up/highest=closest to the whole your looking through, just thinking loud here..)
Btw one thing that could help understanding it is, when its compression stroke tdc the valve will be closed or open?
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