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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 52 (Engine Cooling System) >> Repair Instructions >> Cooling System Draining and Filling (LS4 Static Fill) >> Filling Procedure

Filling Procedure

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. 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 .
  1. Close the radiator drain cock.
  2. If a complete engine block drain was required, install the coolant drain plugs to the engine block. Refer to Draining Fluids and Oil Filter Removal .
    3. IMPORTANT: Use a 50/50 mixture of DEX-COOL antifreeze and clean, drinkable water.
  3. Slowly fill the cooling system with a 50/50 coolant mixture until the coolant level is visible and stable. Refer to Approximate Fluid Capacities .
  4. Install the pressure cap loosely (threaded on about one turn).
  5. Start the engine and raise the engine speed to 2,500 RPM and hold it there for 40 seconds, then shut engine off.
  6. Remove the pressure cap and fill the coolant system until the level is visible and stable.
  7. Install the pressure cap loosely (threaded on about one turn).
  8. Start the engine and raise the engine speed to 2,500 RPM and hold it there for 30 seconds, then shut engine off.
  9. Remove the pressure cap and fill the coolant system until the level is visible and stable.
  10. Install the pressure cap loosely (threaded on about one turn).
  11. Start the engine and raise the engine speed to 2,500 RPM and hold it there for 20 seconds, then shut engine off.
  12. Remove the pressure cap and fill the coolant system until the level is visible and stable.
  13. Install the pressure cap, fully threaded on.
  14. Fill the coolant recovery bottle to the indicator line, then add 400 milliliters (13.5 ounces) more.
  15. Start the engine and run it above 2500 RPM until it is hot enough to open the thermostat, this will allow the trapped air to be purged from the engine.
  16. Complete a series of three, four-second-duration idles with four-second-duration 3000 RPM cycles.
  17. Turn the engine off and allow it to cool down.
  18. Fill the coolant recovery bottle to the indicator line.
  19. Inspect the concentration of the engine coolant using the J 26568  . See Special Tools .
  20. Rinse away any excess coolant from the engine and the engine compartment.
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