GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2004 🢒 Vibe - AWD 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Air Conditioning Evaporator Thermal Expansion Valve Replacement

Removal Procedure

    Object Number: 834871 Size: SH
  1. Discharge and recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Remove the evaporator inlet and outlet hoses from the evaporator tube assembly (3).
  3. Remove the grommet and insulator.
  4. Remove the two bolts (4) and expansion valve (2) from the evaporator.
  5. Remove and discard the O-rings (1).

Installation Procedure

    Object Number: 834871 Size: SH
  1. Install new O-rings (1) coated with mineral base 525 viscosity refrigerant oil to the evaporator and expansion valve.
  2. Install the expansion valve (2) and evaporator tube assembly (3) to the evaporator.

    3. 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.

  3. Install the two bolts (4) to the expansion valve.

    4. Tighten
    Tighten the bolts (4) to 5.4 N·m (48 lb in).

  4. Install the evaporator inlet and outlet hoses.
  5. Evacuate and recharge the refrigerant. Refer to Refrigerant Recovery and Recharging .
  6. Operate the A/C system. Inspect for refrigerant leaks. Refer to Leak Testing .