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12 years ago in FORD
Hey, I'm just learning to work on cars. I'm working on a 79 Mustang with a built up motor and it's leaking coolant at the thermostat housing. I have put in new thermostat and gasket and it is still slightly leaking around lower left side of housing. Any suggestions on how I get this to stop?? Thanks ahead of time for any help. Peace and God Bless, Joe
Answers (4)
12 years ago
Permatex 2 non hardening gasket sealer. I never use silicone base gasket maker for coolant applications,have you seen the stuff that oozes out the sides? Well that same thing happens on the inside,very good for making little worms that end up in the core of your radiator!! 40 years experiance,trust me .
12 years ago
If it was an aftermarket thermostat housing, a lot of the less expensive ones are junk, and warp with the first usage, they shouldn't be allowed to sell them. If it is the OEM housing, and you are still having problems, if it were me, I would file the housing base until it looked like any high spots were gone, and everything the base filed consistently smooth from one side to the other. The gasket adhesive should be used to adhere the gasket to the thermostat housing, and shouldn't be used to try to seal up any leaks, that's not its purpose in life....
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