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Home >> Pontiac >> 2003 >> Aztek AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 311 (Engine Cooling System) >> Removal And Installation >> Coolant Replacement

Coolant Replacement

WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: All entrapped air must be purged from the powertrain cooling system before final coolant level can be determined. Proper coolant level is critical to avoid engine damage.

IMPORTANT:  Vehicle must be level when filling cooling system.

  1. Slowly add a mixture of 50/50 DEX-COOL antifreeze and clean water to coolant surge tank until the level reaches the top of the "Cold fill Range" (surge tank seam). Cooling system volumes, including heater core:
    • 6-Cyl - 8.0L (8.45 qt.)
    • 4-Cyl - 7.0L (7.4 qt.)
  2. Start engine and check for leaks.
  3. Run engine and cycle the vehicle from idle to 3000 rpms in 30 second intervals until the engine cooling fan comes on (engine cooling fan turns on at approximately 216°F [102°C]).
  4. Return the engine to idle, idle for 30 seconds then turn engine off.
  5. Add coolant to the surge tank until the level reaches surge tank vent port.

    IMPORTANT:  Level in the surge tank will return into the cold fill range once the vehicle cools.

  6. Install coolant surge tank cap.