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Td42 Thermostat housing leak:

14K views 31 replies 12 participants last post by  Twinotter600  
I'm going to try to fix it AGAIN for the third time.

I cleaned up the aluminum housing with some emory paper/ razor blade. The Block proved more stubborn. I'm going to grab a pressure tester and see where its leaking.. Appears to be the lower right corner of the flat gasket...
When the housing is off, sit a steel rule on sealing edge. Have a real close look to check for flatness. It could be the reason for a leak. Check everywhere a gasket goes.