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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 677 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Expansion (Orifice) Tube Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Uncap or unplug the evaporator tube.
  2. Lubricate the new O-ring using new 525 viscosity refrigerant oil.
  3. Install the new O-ring seal.
  4. Install the orifice tube (1) to the evaporator tube (2).
    1. 4.1. Coat the O-ring seal with 525 viscosity refrigerant oil.
    2. 4.2. Insert the short screen end of the new orifice (1) into the evaporator tube.
  5. Connect the evaporator tube at the fitting. Tighten the fitting to 25 N.m (18 lb ft).
  6. Evacuate and recharge the system. Refer to Refrigerant Recovery & Recharging .
  7. Leak test the fittings of the repaired component using J 39400-A  .
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