Cooling System: Description and Operation

COMPONENTS
The engine cooling system consists of the radiator the water pump, the cooling fan, and the thermostat.

OPERATION
To quickly increase cold Engine Coolant Temperature (ECT) for smooth engine operation, the Engine Coolant (EC) is circulated by the water pump and thermostat. The EC does not circulate through the radiator at this time. When the ECT reaches the specified level 82°C (180°F), the thermostat will begin to open and a gradually increasing amount of EC will circulate through the radiator. The thermostat will be fully open when the ECT reaches the specified upper level 95°C (203°F). All of the coolant is now circulating through the radiator for effective engine cooling.