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Home >> Buick >> 2004 >> Century Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 139 (Engine Cooling System) >> Repair Instructions >> Draining and Filling Cooling System >> Filling Procedure

Filling Procedure

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: The procedure below must be followed. Improper coolant level could result in a low or high coolant level condition, causing engine damage.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  1. Close the radiator drain cock.
  2. If the engine block was drained L26 or L32 engine install the knock sensors. Refer to Knock Sensor (KS) 1 Replacement and Knock Sensor (KS) 2 Replacement in Engine Controls - 3.8L (L26 and L32).

    or

  3. Open the cooling system bleeder screws.
  4. IMPORTANT: Use a 50/50 mixture of DEX-COOL antifreeze and clean, drinkable water.
  5. Slowly fill the cooling system with a 50/50 coolant mixture. Refer to Capacities - Approximate Fluid in General Information.
  6. Close the cooling system bleeder screws.
  7. Install the coolant pressure cap.
  8. Start the engine.
  9. Run the engine at 2,000-2,500 RPM until the engine reaches normal operating temperature.
  10. Allow the engine to idle for 3 minutes.
  11. Shut the engine OFF.
  12. Allow the engine to cool.
  13. Top off the coolant as necessary.
  14. Inspect the concentration of the engine coolant using the J 26568  . See Special Tools and Equipment .
  15. Rinse away any excess coolant from the engine and the engine compartment.