Section 3 (2.0L Cooling System): Operation

The cooling system regulates engine operating temperature. It allows the engine to reach normal operating temperature, maintain normal operating temperature and prevent overheating.

The cooling system also provides a source of hot coolant for heating the passenger compartment and cooling the automatic transmission fluid (if equipped). The cooling system is pressurized and uses a centrifugal water pump to circulate coolant throughout the system.

• When engine is cold the thermostat is closed. The cooling system has no flow through the radiator. The coolant flows through the engine, water pump, and heater core.
• When engine reaches normal operating temperature the thermostat is full open. On the gas engine, coolant flows through the engine, radiator, heater core and water pump.