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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 222 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Thermal Expansion Valve Replacement - Auxiliary >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the cap or tape from the evaporator lines.
  2. Install the new sealing washers onto the evaporator lines. Refer to Sealing Washer Replacement .
    3. Fig 1: View Of Auxiliary TXV
    GM882523Courtesy of GENERAL MOTORS CORP.
  3. Install the auxiliary TXV to the evaporator core.
    4. NOTE: Refer to Fastener Notice .
  4. Install the auxiliary TXV to the evaporator core mounting bolts.

    Tighten:  Tighten the bolts to 3.5 N.m (31 lb in).

  5. Remove the cap or tape from the A/C lines.
  6. Install the new sealing washers onto the A/C line. Refer to Sealing Washer Replacement .
  7. Install the A/C lines to the auxiliary TXV.
    8. Fig 2: View Of Auxiliary TXV Line Block Fitting
    GM882519Courtesy of GENERAL MOTORS CORP.
  8. Install the auxiliary TXV line block fitting retaining bolt.

    Tighten:  Tighten the nut to 11 N.m (97 lb in).

    9. Fig 3: View Of Auxiliary TXV Line Clamp
    GM882517Courtesy of GENERAL MOTORS CORP.
  9. Install the auxiliary TXV line clamp to the HVAC module assembly.
  10. Install the auxiliary TXV line clamp screw.

    Tighten:  Tighten the screw to 1.6 N.m (14 lb in).

  11. Install a new foam wrap to the auxiliary TXV.
  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  .
  14. Install the left lower quarter trim panel. Refer to Trim Panel Replacement - Rear Quarter - Left in Interior Trim.
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