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Old 01-07-2013, 02:13 PM   #40
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Join Date: Oct 2004
Location: Cincinnati, Ohio
Posts: 496
Default Re: Phenolic Heat Shields

Originally Posted by solarcar_sc1 View Post
from a post I read a while back, for long runs ie highway, the rise in combustion temp. can cause your exhaust valves and ultimately end up causing valve float.
No. Valve float is when the valve does not fully close before the next cycle due to week or inadequate valve springs. In other words, it sort of "floats" in the open position. It usually occurs at very high RPM, 10,000 and up and with valve trains having a large mass such a push rod engines. No Saturn would ever see valve float unless there is something wrong with the valve spring(s).
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