!997 Ford Explorer thermastat housing.
My thermostat housing keeps leaking where the top and bottom meet..I have replaced the top housing and thermostat and gasket ..still leaked ..I again replaced the gasket and used sealant..still leaks..Not sure what i'm missing ,,any ideas would be great
Ps ..I have thoroughly cleaned the parts each time.
I am a little familiar with those two-piece housings you have...no offense but is the thermostat backward?
I wish it was something like that,but no :)
Very unusual. The housing should bolt right on and the sealant should effectively block any residual weak areas between the mating surfaces. I would give it another try. Remove and clean bothe mating surfaces. Make sure they are dry and then apply a good quality sealant. Bolt the parts together and tighten them. Allow the parts to cure for as long as a day before refilling the cooling system and running the engine. Good luck.
Don't forget the gasket!
Thanks ..Ill give it another go
Clean both surfaces until they shine. A fine wet/dry sandpaper is good for this. Check with the tip of your finger making sure there are no burrs on either part. Check to make sure there are no hair line cracks on either surface. Purchase a slightly heaver piece of gasket material - heat resistant. Can usually be purchased in 4 inch by 4 inch squares. Place the new material over the removable portion of the housing and tap gently around the housing and around the holes to leave the impression on the housing of the contact side of the housing cover. Cut with a razor or exacto knife. Cut out holes for bolt. Apply sealant and attach. Alternate tightening bolts from one to another until secure. This will fix the problem. If it still leaks something is probably cracked.
Or one of your mounting surfaces is warped
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