GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Cavalier 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Temperature Valve Replacement

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Remove the instrument panel. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gauges and Console.
  3. Remove the console. Refer to Console Replacement in Instrument Panel, Gauges and Console.
  4. Disconnect the floor heater duct connector.
  5. Remove the heater outlet.
  6. Remove the heater core cover.

    7. The heater core cover mounting screw is located in a recess in the center of the cover.

  7. Remove the heater valve lever link.
  8. Remove the heater valve.
  9. Drain the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
  10. Disconnect the heater hoses from the heater core.
  11. Remove the heater core.
  12. Remove the heater core shroud.

    13. The heater core shroud mounting screw is located at the middle of the front of the dash.

  13. Remove the temperature cable from the temperature valve. Position the temperature control cable aside.
  14. Unclip the link end of the temperature valve shaft.
  15. Remove the temperature valve from the module. Complete the following steps:
    16. 15.1. Slide the valve to the right.
    15.2. Pull down on the valve in order to remove the link end of the valve.

Installation Procedure
  1. Install the temperature valve to the module. Complete the following steps:
    2. 1.1. Insert the link end of the valve into the module.
    1.2. Push up on the valve into the module in order to seat the valve.
  2. Clip the link end of the temperature valve shaft.
  3. Install the temperature cable to the temperature valve.

    4. 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.

  4. Install the heater core shroud.

    5. Tighten
    Tighten the screws to 1 N·m (9 lb in).

  5. Install the following components:
    6. • The heater core
    • The straps

    Tighten
    Tighten the screws to 1 N·m (9 lb in).

  6. Install the heater valve.
  7. Install the heater valve lever link.
  8. Install the heater core cover.

    9. Tighten
    Tighten the screws to 1 N·m (9 lb in).

  9. Install the heater outlet.

    10. Tighten
    Tighten the screws to 1 N·m (9 lb in).

  10. Connect the floor heater duct connector.
  11. Install the instrument panel. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gauges and Console.
  12. Install the console. Refer to Console Replacement in Instrument Panel, Gauges and Console.
  13. Connect the negative battery cable.

    14. Tighten
    Tighten the bolt to 16 N·m (12 lb ft).