Thread: Rebuild or no?
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  #30   IP: 165.225.20.168
Old 01-13-2022, 11:24 AM
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Quote:
Originally Posted by Dave Neptune View Post
Surcouf, what do you mean by frozen in the air?

(...)
The valves can't go much further "up or open" either than the cam profile as the springs are almost completely collapsed when the valve is fully open in almost any engine.

Dave Neptune
Dave,

I am reacting to this previous quote
"Scratchee, that is exactly the case as shown in your photo, the spring does not move up and down and the valve stem doesn't come into contact with the tappet. In fact with the tappet at it's farthest position up there is still about 1/8-1/4 inch of space between the bottom of the valve stem and where it is supposed to contact it."

This would mean that the bottom of the valve stem is frozen 1/8 to 1/4" above the highest position of the tappet when rotating the engine. I cannot figure out how the valve could have "forced the spring" to climb that high, and freeze in place, without being pushed up by the tappet.
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