For 1990-2009 cars

Problem | Action
--- | ---
Coolant fan inoperative | Refer to Low Engine Coolant Indicator Always On .
Thermostat stuck closed | Replace the thermostat.
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

Surge tank outlet hose pinched or kinked (at radiator) |

• | Relieve kinks by re-routing

• | Replace the hose if necessary

Incorrect radiator | Refer to the radiator usage chart in a parts catalog. If needed, replace with the correct radiator.
Loss of system pressure |

• | Pressure check the system and the surge tank cap

• | Ensure that the correct cap is being used

Damaged or missing air seals or deflector | Repair or replace as required.
Malfunctioning coolant pump | Replace the coolant pump. Refer to Water Pump Replacement .
Air trapped in cooling system | Refill the cooling system.