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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1380 (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 Vibe. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: O-Rings, Expansion Valve, Evaporator Tube Assembly And Bolts
    GM834871Courtesy of GENERAL MOTORS CORP.
  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. NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the two bolts (4) to the expansion valve.

    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 .
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