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Originally Posted by craig3x
This may be a very dumb question, but when you first start a car and the thermostat is closed so that the engine can warm up, what happens to all the coolant that the water pump is still trying to push? Seems like it has no where to go since it is not looping through until the thermostat opens.
"it flows through the heater core (if it's open) and weeps through the t-stat".
hmmm, but I don't have a heater core. And I guess my question is that if I installed one of those fancy 50gph electric pumps, what would happen when the thermostat is closed? sounds like major pressure build up???
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