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Valve cover gaskets

Shadrack

Member
Local time
9:52 PM
Joined
Jun 10, 2025
Messages
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Location
Sunbury OH
What’s the best valve cover gasket for a 68 383 using the chrome MP valve covers? I bought Mr. Gasket Ultra Seals from Mancini but the fit is not good and they have no alignment tabs. Thanks!

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I use grease on both sides of a plain cork gasket. Then they can be re sealed several times without tearing. Careful not to over tighten though as they will split.
 
Good old cheap cork !
Another vote for cork gaskets. I use 3M Weatherstrip Adhesive to glue the gasket to the valve cover and lightly grease to head side of the gasket for easy removal.

I tried the black gaskets (supposedly able to mold to different surfaces) at the recommendation of a parts store employee. Big fail for me. Leaked like a sieve.
 
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