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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1666 (Heating, Ventilation And Air Conditioning) >> Repair Instruction >> Compressor Oil Balancing >> Draining Procedure

Draining Procedure

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Drain and measure as much of the refrigerant oil as possible from the removed compressor.
  1. Remove the compressor crankcase oil drain plug and drain the crankcase into a clean, graduated container.
  2. Drain the oil from both the suction and discharge ports of the removed compressor into the same container.

    Rotate the compressor shaft to assist in draining the compressor.

    Fig 1: Draining Oil From Both Suction & Discharge Ports Of Removed Compressor
    G01568501Courtesy of GENERAL MOTORS CORP.
  3. Measure and record the amount of oil drained from the removed compressor.

    This measurement will be used during installation of the replacement compressor.

  4. Properly discard the used refrigerant oil.
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