Thanks for the suggestion but the filter that I have does not have a grove in the cap. It is just a 1/4" wide flat. I have made several different gaskets but have had no luck. The top of the canister is about 1/16" thick and provides very little surface to seal to the gasket. If I over tighten the top it tends to cut through the gasket


1941 Chevy Master 3/4-Ton
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Born to fish, the truck is only a hobby.