Coolant leaks from thermostat housing Is there another gasket besides I
Coolant leak at thermostat housing(Plastic)
have new O ring Coolant just keeps seeping
thru.Is there another gasket I need? Help
Just the O ring. Make sure the groove where O ring sits, is clean, smooth and torqued to spec. If everything looks good and still leaks, use blue silicone over the O ring and let it sit for a about 4 hrs before adding coolant or running the engine.