Re: 352 Freeze Plugs (Block plugs)

Posted by Jack Vines On 2013/5/17 10:30:12

I know several successful engine builders who use different varieties of the Permatex line - aviation, #1, #2, Indian Head gasket sealants and also many who prefer silicone sealers. They all have their internal logic.

FWIW, most factory engine assembly line plugs were installed without any sealant. The sealant is for when the holes in the block are rusted or damaged by removal/installation.

jack vines