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| | | | Joined: May 2005 Posts: 281 'Bolter | | 'Bolter Joined: May 2005 Posts: 281 | When cold weather arrived I noted that my truck engine would not quite come up to normal operating temperature. I checked the thermostat to verify that it opens at 195 degrees as it should. When I was putting it back together noticed that the intake manifold cavity where the thermostat sits is deeper than the thickness of the thermostat by about .040". I made a ring gasket .040 thick to fit the cavity on top of the thermostat and put it back together. The thermostat is captured and can't move. Now the engine warms up quicker and maintains the proper operating temperature. I suspect the thermostat was able to flutter inside the water neck and allow coolant into the radiator without the thermostat opening.
The engine is a basic 350 with Edelbrock intake manifold. Does anyone think I have caused some unintended problem by this 'fix'? All indications are that it is working as it should.
Mark | | | | | Joined: Feb 2004 Posts: 29,796 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,796 | Don't some thermostats use a rubber ring with a slot in the middle instead of a paper gasket to seal the top and bottom against leakage? That would serve the same purpose as your shim gasket, I think. I don't see a problem with making sure the stat is a tight fit in the housing.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: May 2005 Posts: 281 'Bolter | | 'Bolter Joined: May 2005 Posts: 281 | Thanks. This thermostat does not have a rubber ring or I may have lost it along the way. That rubber ring you describe would sure make a better seal. I will look for one. The neck has an O-ring to seal to the manifold but it does not contact or confine the thermostat.
Mark | | |
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