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Home >> Hummer >> 2008 >> H3 Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 167 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> Compressor Oil Balancing >> Balancing Procedure

Balancing Procedure

WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: The refrigerant oil in the A/C system must be balanced during compressor replacement.
    Before installing the replacement compressor, the refrigerant oil will have to be fully drained.
    Fig 1: View Of Drain Oil Bolt On Compressor
    GM1544588Courtesy of GENERAL MOTORS CORP.
  1. Remove the oil drain bolt from the replacement A/C compressor.
    2. Fig 2: Draining Oil From Compressor Into Clean Graduated Cylinder
    GM1544587Courtesy of GENERAL MOTORS CORP.
  2. Drain the oil from the compressor oil drain into a clean graduated cylinder.
  3. Drain the oil from the suction and discharge ports into the clean graduated cylinder. Rotate the compressor shaft to assist in draining the compressor.
  4. Add back the same quantity of new PAG oil into the replacement compressor as drained from the removed compressor through the compressor oil drain.

    Refer to the amount of refrigerant oil recorded during the compressor removal.

  5. Install the compressor oil drain bolt.

    Tighten:  Tighten the bolt to 30 N.m (22 lb ft).

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