Fixed persistent thermostat housing leak.

'68cuda416 said

Hmmm just must be lucky I guess as I have never had an issue on 4 different engines now. Most seem to struggle with common sense and the basics....a good quality housing or a sanded flat OE one, a good gasket like from Superformance and a very small bead of RTV and zero issues. Oh well maybe it's lottery ticket buying day.

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I might say fortunate rather than lucky......

"Most struggle with common sense" hmmm, pretty bold statement. What are you suggesting about yourself with this line, just curious?

Although I agree, a pretty simple setup, which should be easy enough to deal with, many have struggled with this. I have not had this issue on any of my other vehicles. I also agree that many times the factory parts are best, I could not make that seal after verifying it was true on a thick piece of glass. Very surprising was an aftermarket one machined flat on a Friday, was warped by Sunday with coolant never exceeding 185. I suspect porosity problems in the metallurgy.