Coolant Pump and ThermostatA centrifugal-type coolant pump and its housing are mounted to the cylinder block. The pump is crankshaft-driven by a V-belt, and circulates coolant through the system whenever the engine is running. A thermostat is located in the coolant pump housing and controls coolant flow into the pump. When the engine is cold, the thermostat is closed and coolant bypasses the radiator, recirculating from the engine directly back to the pump inlet. When the engine reaches normal operating temperature, the thermostat opens and coolant circulates through the whole system, including the radiator. |
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