aristech Posted March 12 Share Posted March 12 Anyone out there have a way to seal the thermostat housing to the head on a 1935 Pontiac 8? Link to comment Share on other sites More sharing options...
Grimy Posted March 13 Share Posted March 13 Is there something unique about the mating surfaces on that car? Photos or at least a more detailed explanation would help us help you. Usually a gasket, even a thicker-than-normal one, would suffice for a stat housing bolted to an L-head. Uneven/corroded surfaces? Link to comment Share on other sites More sharing options...
aristech Posted March 13 Author Share Posted March 13 Nothing special. I am asking if anyone has had this issue and has figured out a way for it not to leak. Link to comment Share on other sites More sharing options...
Grimy Posted March 13 Share Posted March 13 If it has been leaking despite a new gasket, surface (plane) the stat housing, as it's important to have two parallel surfaces. If the stat housing is cast iron or cast aluminum, fill any remaining pits with JB Weld or similar, and smooth them out. If the mounting fasteners are studs in the head, be sure to clean the circumference of the studs where they emerge from the head, using a dental pick. If it has been leaking (apparently so) and the surfaces are irregular, use/make a thicker gasket, maybe as much as 5/32", coated with gasket dope (I prefer ol' reliable Permatex #2) on both sides. Tighten evenly, alternating between/among the fasteners. Am I missing something here? 1 Link to comment Share on other sites More sharing options...
aristech Posted March 13 Author Share Posted March 13 Sounds good. Thanks for your help. I will work on it tomorrow 1 Link to comment Share on other sites More sharing options...
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