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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1280 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Thermal Expansion Valve Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install new O-rings (1) coated with mineral base 525 viscosity refrigerant oil to the evaporator and expansion valve.
    Fig 1: Installing Thermal Expansion Valve
    G01545435Courtesy of GENERAL MOTORS CORP.
  2. Install the expansion valve (2) and evaporator tube assembly (3) to the evaporator.
    NOTE: Refer to FASTENER NOTICE .
  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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