GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 38185 Hose Clamp Pliers

Removal Procedure

  1. Drain the cooling system. Refer to Cooling System Draining and Filling .
  2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls-4.6L (LH2).
  3. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical-4.6L (LH2).

  4. Object Number: 927998  Size: SH
  5. Remove the throttle body from the water outlet housing. Refer to Throttle Body Assembly Replacement in Engine Controls-4.6L (LH2).
  6. Remove the MAP sensor. Refer to Manifold Absolute Pressure Sensor Replacement in Engine Controls-4.6L (LH2).
  7. Remove the purge solenoid. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement in Engine Controls-4.6L (LH2).
  8. Position the J 38185 to the hose clamps to remove the following hoses from the water outlet housing:
  9. • The surge tank outlet hose
    • The radiator hose
    • The heater hose
    • The bypass hose

    Object Number: 928004  Size: SH
  10. Remove the bolts securing the water outlet housing to the cylinder heads. Discard the gasket.
  11. Clean and inspect. Refer to Water Outlet Housing Cleaning and Inspection in Engine Mechanical-4.6L (LH2).
  12. Remove the following components from the water outlet housing:
  13. • The water crossover pipe plug.
    • The throttle body inlet heater hose fitting.

Installation Procedure

  1. Install a new water outlet housing gasket.
  2. Place the water outlet housing in position and hand start the bolts to hold the housing in place.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Tighten the water outlet housing bolts.
  5. Tighten
    Tighten the water outlet housing bolts to 25 N·m (18 lb ft).

  6. Connect the following hoses to the water outlet housing:
  7. • The bypass hose
    • The heater hose
    • The radiator hose
    • The surge tank inlet hose
  8. Position the J 38185 to the hose clamps to secure the hoses to the water outlet housing.
  9. Install the purge solenoid. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement in Engine Controls-4.6L (LH2).

  10. Object Number: 927998  Size: SH
  11. Install the map sensor. Refer to Manifold Absolute Pressure Sensor Replacement in Engine Controls-4.6L (LH2).
  12. Install the throttle body to the water outlet housing. Refer to Throttle Body Assembly Replacement in Engine Controls-4.6L (LH2).
  13. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical-4.6L (LH2).
  14. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls-4.6L (LH2).
  15. Fill the cooling system. Refer to Cooling System Draining and Filling .