Re: Distorted/leaking thermostat covers

[DAN ANDERSON]

The way I remember this working is the part sticking out of the casting holds the thermostat down in place. The OEM gasket is already very thick. Doubling the gasket makes the thermostat loose and leaky. Now if you are removing the thermostat then it doesn’t matter, but that is another discussion. Removing material around the outside surface only will make the casting dig into the thermostat and warp it at the screws. Just something else to think about when you are dealing with this irritating part.

Dan in TN