Coolant level or mixture incorrect

Check the coolant mixture and add coolant as necessary.

Air trapped in cooling system

Refill the cooling system. Refer to Cooling System Draining and Filling .

Surge tank outlet hose pinched or kinked, especially at radiator

Relieve kinks by re-routing. Replace the hose if necessary.

Radiator fins obstructed

Remove or relocate add-on parts that block air to the radiator. Clean away bugs, leaves, etc. In cold climates, clear away snow, etc. from the radiator core.

Loose, damaged and or missing air seals, deflector or fan shroud

Repair or replace as required.

Thermostat malfunction - stuck in closed position

Inspect and replace the thermostat. Refer to Engine Coolant Thermostat Replacement .

Cooling fan malfunction

Check the cooling fan for missing fan blades or loose fan belt. Replace the fan if necessary. Refer to Fan Replacement or Condenser Fan Inoperative if equipped with air conditioning.

Cooling system passages restricted

1. Remove the obstruction.
2. Flush the cooling system as required.
3. Refill with coolant. Refer to Cooling System Draining and Filling .

Incorrect temperature gage reading

Check the temperature gauge for proper operation. Connect a Scan Tool to the vehicle and read the system temperature. Compare this reading to the temperature gauge. Replace the gage if necessary. Refer to Fuel/Temperature Gage Replacement

Loss of system pressure

Check the following areas for possible leakage:

Pressure check the system and cap. Ensure the correct cap is being used.

Malfunctioning coolant pump, eroded or broken impeller blades

Replace the coolant pump. Refer to Water Pump Replacement .

Incorrect radiator

Check the radiator usage chart in a parts catalog. If needed, replace with the correct radiator.