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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1151 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Thermal Expansion Valve Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the cap or tape from the evaporator core.
  2. Install the new sealing washers onto the evaporator core. Refer to Sealing Washer Replacement .
    3. Fig 1: View Of TXV
    GM791147Courtesy of GENERAL MOTORS CORP.
  3. Install the TXV to the evaporator core.
    4. NOTE: Refer to Fastener Notice in Cautions and Notices.
  4. Install the TXV to evaporator bolts.

    Tighten:  Tighten the bolts to 3.2 N.m (28 lb in).

  5. Remove the cap or tape from the A/C refrigerant tubes.
  6. Install the sealing washers onto the A/C refrigerant tubes. Refer to Sealing Washer Replacement .
  7. Install the evaporator inlet tube to the evaporator outlet tube.
  8. Install the evaporator outlet and inlet tubes to the TXV.
    9. Fig 2: View Of Brake Booster
    GM628874Courtesy of GENERAL MOTORS CORP.
  9. Install the evaporator outlet tube nut.

    Tighten:  Tighten the nut to 16 N.m (12 lb ft).

  10. Connect the vacuum hose to the brake booster.
  11. Reposition the heater hoses.
  12. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  13. Leak test the fittings of the component using J 39400-A  .
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