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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 196 (Engine Cooling System) >> Repair Instructions >> Cooling System Draining and Filling (Static Fill) >> Filling Procedure

Filling Procedure

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    NOTE: The procedure below must be followed. Improper coolant level could result in a low or high coolant level condition, causing engine damage.
  1. Install the lower radiator hose to the radiator.
  2. Using the J 38185  , reposition the lower radiator hose clamp. See Special Tools .
    3. NOTE: Refer to Fastener Notice .
  3. If the left and right engine block coolant drain plugs were removed, perform the following:
    1. Apply pipe sealer to the drain plugs.
    2. Install the drain plugs.

      Tighten:  Tighten the drain plugs to 60 N.m (44 lb ft).

  4. Install the engine block coolant heater, if equipped. Refer to Coolant Heater Replacement (RPOs LY2/LMG/LY5/LY6)  or Coolant Heater Replacement (RPOs LC9/L76/L92) .
  5. Lower the vehicle.
    6. IMPORTANT: Use a 50/50 mixture of DEX-COOL antifreeze and clean, drinkable water.
  6. Slowly fill the cooling system with a 50/50 coolant mixture. Refer to Approximate Fluid Capacities .
  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.

    Engine should reach an operating temperature of 90°C (194°F) and the upper radiator hose should be HOT.

  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 .
  15. Rinse away any excess coolant from the engine and the engine compartment.
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