1. Inspect the level of the coolant in the coolant surge tank. Refer to Cooling System Draining and Filling .
2. Add engine coolant as necessary.

Does the engine reach normal operating temperature now?

System OK

Go to Step 2

1. Inspect for a blockage in the coolant passages.
2. Flush the cooling system or flow inspect the radiator. For further information on flushing the cooling system, refer to Flushing .

Does the engine reach normal operating temperature now?

System OK

Go to Step 3

1. Inspect to see if the correct type of thermostat was installed.
2. Inspect if the thermostat is stuck in the open position. Refer to Thermostat Diagnosis .
3. If necessary, replace the thermostat. Refer to Engine Coolant Thermostat Replacement .

Does the engine reach normal operating temperature?

System OK

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