Recommendation - cooling system leak

[paul2748]

I have a very small leak at the thermostat housing and want to try a anti leak product - can you give me a recommendation?

Thanks

[petehoovie]

K-Seal > https://www.kseal.com/products/k-seal

[Kojack]

Paul

What year engine?

[G.M.]

Originally Posted by paul2748

I have a very small leak at the thermostat housing and want to try a anti leak product - can you give me a recommendation?

Thanks

I would remove the stat housing and try and fix it. Other SMALL leaks
can be fixed with a large bottle of Barr's block sealer, the type with
copper particals. I just sealed a few small leaks in the radiator
yesterday. I warmed the engine and with the radiator almost filled
I slowly poured the stop leak in watching the water circulate. The
leaks stopped in about 8 minutes. This should be used in all old Ford
engines to stop or prevent head gasket and stud bolt leaks. Leave the
cap on over night after shutdown to force the sealer into any leaks.
G.M.

[willowbilly3]

I have always used Barr's too, it don't clog radiators and heater cores but I just heard a friend from a dealership say they have some kind of powdered ginger that works really well. On something as small and easy to fix as a thermostat housing, I would take it off and fix it right. Check it for flat with a straight edge, lap it with a sheet of good sand paper or emery and a real flat surface, like a pane of glass.

[paul2748]

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Y Block - 312

Originally Posted by Kojack

Paul

What year engine?