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Re: Thermostat - What does it do exactly? (archive)
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Posted by Rich 1990 750iL on June 17, 2001 at 05:06:51:

In Reply to: Thermostat - What does it do exactly? posted by Ken on June 16, 2001 at 21:49:32:

All a thermostat is, is a valve. When the temperature hits a certain point, say 180 degrees, it opens. At that point the coolant is allowed to circulate through the engine. By waiting to open until that set temperature, the engine is allowed to get to operating temperature. Once the coolant is flowing, the engine temp is regulated to not go any whigher...we hope.

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