I would first check valve adjustment,You might have one tightened down to much.Do you have solid or hydrolic lifters?
Probably hydrolic,What I do is,with the engine running,back off rocker adjustment until it starts tapping then turn back until it stops, then 1/4 turn.If solid lifters ,adjust with specs from
a manual.

Last edited by PapaJ; 04/19/2009 6:20 PM.
1953 Chevy Two-Ton
In the Stovebolt Gallery
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Be careful calling yourself a expert,because an "EX" is a hasbeen and a"SPERT" is a drip under pressure.