GM Service Manual Online
For 1990-2009 cars only

Heater Outlet Hose Replacement LNJ

Removal Procedure


    Object Number: 1646757  Size: SH
  1. Drain the engine coolant. Refer to Cooling System Draining and Filling .
  2. Remove the heater outlet hose clamp from the heater core.
  3. Remove the heater outlet hose (1) from the heater core.

  4. Object Number: 1646756  Size: SH
  5. Remove the heater outlet hose clamp from the engine.
  6. Remove the heater outlet hose (1) from the engine.
  7. Position the loose end of the heater outlet hose (1) outboard to ease in the removal of the surge tank.

  8. Object Number: 1646806  Size: SH
  9. Remove the surge tank inlet hose clamp from the surge tank.
  10. Disconnect the surge tank inlet hose from the surge tank.

  11. Object Number: 1327504  Size: SH
  12. Remove the surge tank bolts from the surge tank.
  13. Lift the surge tank to gain access to the heater outlet hose.
  14. Remove the heater outlet hose clamp from the surge tank.
  15. Remove the heater outlet hose from the surge tank.
  16. Remove the surge tank from the vehicle.
  17. Remove the heater outlet hose clamp from the hose. This will aid in routing the heater outlet hose from the vehicle.
  18. Remove the heater outlet hose from the vehicle.

Installation Procedure


    Object Number: 1327504  Size: SH
  1. Install the heater outlet hose to the vehicle. Route the hose into position for attachment to the surge tank.
  2. Install the heater outlet hose clamp to the hose.
  3. Install the heater outlet hose to the surge tank.
  4. Install the surge tank to the vehicle.
  5. 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.

  6. Install the surge tank bolts to the surge tank.
  7. Tighten
    Tighten the bolts to 8 N·m (71 lb in).


    Object Number: 1646806  Size: SH
  8. Connect the surge tank inlet hose to the surge tank.
  9. Install the surge tank inlet hose clamp to the surge tank.

  10. Object Number: 1646756  Size: SH
  11. Install the heater outlet hose (1) to the engine.
  12. Install the heater outlet hose clamp to the engine.

  13. Object Number: 1646757  Size: SH
  14. Install the heater outlet hose (1) to the heater core.
  15. Install the heater outlet hose clamp to the heater core.
  16. Fill the engine coolant. Refer to Cooling System Draining and Filling .

Heater Outlet Hose Replacement LY7


Object Number: 1872315  Size: MF

Callout

Component Name

Preliminary Procedures

  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement.
  2. Partially drain the cooling system. Refer to Cooling System Draining and Filling.

1

Heater Outlet Hose Clamp (Qty: 2)

2

Heater Outlet Hose