GM Service Manual Online
For 1990-2009 cars only

Heater Water Shutoff Valve Replacement Engine Valve

Removal Procedure

  1. Drain the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.

  2. Object Number: 220082  Size: MH
  3. Remove the heater water shut off valve hose nipple from the auxiliary heater water shut off valve.
  4. Remove the heater water shut off adapter from the auxiliary heater water shut off valve.
  5. Remove the heater water shut off hose from the auxiliary heater water shut off adapter.
  6. Remove the heater water shut off hose from the auxiliary heater water shut off valve elbow.
  7. Remove the heater water shut off hose bolt from the engine.
  8. Remove the heater water shut off hose clamp from the engine.
  9. Remove the heater water shut off valve elbow from the auxiliary heater water shut off valve adapter.
  10. Remove the heater water shut off valve adapter from the engine.

Installation Procedure


    Object Number: 220082  Size: MH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  1. Install the heater water shut off valve adapter to the engine.
  2. Tighten
    Tighten the valve adapter to 35 N·m (26 lb ft).

  3. Install the heater water shut off valve elbow to the heater water shut off valve adapter.
  4. Tighten
    Tighten the valve elbow to 35 N·m (26 lb ft).

  5. Install the heater water shut off hose clamp to the engine.
  6. Install the heater water shut off hose bolt to the engine.
  7. Tighten
    Tighten the bolt to 55 N·m (41 lb ft).

  8. Install the to the auxiliary water shut off valve elbow.
  9. Tighten
    Tighten the heater water shut off hose to 35 N·m (26 lb ft).

  10. Install the auxiliary heater water shut off hose to the auxiliary heater water shut off adapter.
  11. Tighten
    Tighten the to 35 N·m (26 lb ft).

  12. Install the heater water shut off adapter to the heater water shut off valve.
  13. Tighten
    Tighten the valve to 35 N·m (26 lb ft).

  14. Install the heater water shut off valve hose nipple to the heater water shut off valve.
  15. Tighten
    Tighten the valve to 25 N·m (18 lb ft).

  16. Add the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.

Heater Water Shutoff Valve Replacement Radiator Valve

Removal Procedure

  1. Remove the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
  2. Remove the nipple from the heater hose.

  3. Object Number: 220075  Size: SH
  4. Remove the radiator water shut off valve from the nipple at the radiator.

Installation Procedure

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  1. Install the nipple to the radiator.
  2. Tighten
    Tighten the radiator nipple to 35 N·m (26 lb ft).


    Object Number: 220075  Size: SH
  3. Install the radiator water shut off valve to the nipple at the radiator.
  4. Tighten
    Tighten the valve to 30 N·m (22 lb ft).

  5. Install the nipple to the heater hoses.
  6. Tighten
    Tighten the nipples to 25 N·m (18 lb ft).

  7. Add the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.