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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 78 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Thermal Expansion Valve Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the new sealing washers onto the evaporator core. Refer to Sealing Washer Replacement .
    2. Fig 1: View Of TXV
    GM791147Courtesy of GENERAL MOTORS CORP.
  2. Install the TXV to the evaporator core.
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the TXV to evaporator bolts.

    Tighten:  Tighten the bolts to 7 N.m (62 lb in).

  4. Remove the cap or tape from the evaporator inlet and outlet tubes.
  5. Install the new sealing washers onto the evaporator inlet and outlet tubes. Refer to Sealing Washer Replacement .
  6. Install the evaporator outlet and inlet tube to the TXV.
    7. Fig 2: Removing Block Fitting Nut (3.8L)
    GM1118015Courtesy of GENERAL MOTORS CORP.
  7. Install the evaporator tube nut (1).

    Tighten:  Tighten the nut to 27 N.m (20 lb ft).

  8. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  9. Leak test the fittings of the component using J 39400-A.
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