Quote:
Originally Posted by Christ
If the electric water pump is ECU controlled, why would you need a t-stat at all?
I mean, the ECU could just shut off the pump and monitor temps until the pump needed to move the hot coolant.
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Heater circuit. Most thermostats/housings have a bypass to allow coolant to circulate through the intake manifold, if applicable, and the heater core. Without a pump always pumping this either wouldn't happen or would circulate very slowly. I suppose a second small pump could be used for this.
Don