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Stopped in a NAPA store yesterday to check on a new valve cover gasket for my newly acquired 235. Found out there are two sizes, a 5/32” and a 7/32”. Which one should I get? I’m leaning towards the thicker of the two.
I’m curious why there are two different thicknesses?
Last edited by Spotbiltxo; Sat Apr 09 2022 03:26 AM. Reason: Added “gasket”
Chuck 1950 Chevy 1/2 ton (all original) 1951 Chevy 1/2 ton (future streetrod) 1941 Chevy coupe 1938 Chevy coupe streetrod
Overtightening the thin metal valve cover is a typical source of leaking. Using spreaders help. I straighten my valve cover before using a new gasket. It is the nature of real cork to oil soak a little in order to seal.
spotbiltxo Would go with the thick one for warp reasons as was said. I like to put a thin coat of gasket maker on the gasket then wash the head flat surface clean and dry .Put the gasket on so it is like a dam to the oil then tighten the cover while the gasket maker is still pliable. If you don't put gasket maker on the top gasket surface may be able to take it on and off when needed. But of course it will soak up oil worse so your call . My .02 cents If you wait overnite before starting so your stuff can set up may not get oil soaked as soon .
buoymaker Ever have a neoprene gasket ?? It'll get slimy like an eel so you can't keep it under the cover one of those was enough. Never did try to glue it down though,that might have worked better.
Also learned not to use indian head shellac especially on the side cover,hard to get it off and hard to scrape clean,lot of loose cork to get in the engine
If anyone has used silicone valve cover gaskets on their Chevy I6 and have found it not to work well, now is a good time to share details of your experience with the forum. I for one have only used cork because that was what was available at the time.
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
I used one on this motor. You have to look but it’s there. It worked fine. I changed back to a cork only because the orange clashed. That, and I did not have a purse and shoes to match.
