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Home >> Pontiac >> 2002 >> Aztek AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1525 (Engine Cooling System) >> Diagnostic Information and Procedures >> Engine Overheating

Engine Overheating

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Engine Overheating

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 Removal .
Air trapped in cooling system Refill the cooling system.
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