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Thermostat Housing Gasket (Read 1123 times)
WestOzJavelinMan
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Thermostat Housing Gasket
06/04/11 at 15:22:23
 
Just wondering what people use as a thermostat housing gasket, just the fiber gasket, the fiber gasket plus some silastic (RTV, silicone, etc) or just silastic. The reason I ask is that I just used the fiber gasket dry and it leaked, it was a funky one with self adhesive backing on one side, which I thought was a good idea but maybe not. New manifold and the mating surface on the thermostat housing looks pretty good.
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ken
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Re: Thermostat Housing Gasket
Reply #1 - 06/04/11 at 15:35:37
 
Check the housing on a flat surface. Might be warped from past over-torque. You can dress it with a file if needed. RTV on both sides can't hurt. That's what I do.  Wink
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Re: Thermostat Housing Gasket
Reply #2 - 06/05/11 at 13:18:09
 
Check if flat as per Ken. I put the sticky side to the housing, stat in the manifold and never had any issues. IF the gasket has no "sticky" I have used 3M weather strip glue (yellow) to hold gaskets in place but other than that I use nothing.
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GD5052
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Re: Thermostat Housing Gasket
Reply #3 - 06/05/11 at 16:36:32
 
Ken is correct about making sure the housing is flat, put a sheet of 80 grit sand paper on a flat surface, a pane of glass is perfect and sand the housing in a circular motion to square it up then use RTV high temp on the gasket, install, then have a cold one.
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JLL73
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Re: Thermostat Housing Gasket
Reply #4 - 06/07/11 at 02:26:02
 
yup....X2. flat and a little rtv
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WestOzJavelinMan
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Re: Thermostat Housing Gasket
Reply #5 - 06/19/11 at 03:08:22
 
Bit of an update, give the housing a bit of a clean up on the mating surface using the old wet and dry on a pane of glass method. Then what I did was cut away the inside of the gasket to maybe half it's original width. It was one of the self adhesive type so I stuck it to the housing then ran a small bead of RTV around the inside whare I has cut the gasket out, sort of like a made in-situ o-ring, bolted it down and left overnight to set. Seems to be holding up so far.
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