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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1887 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> Compressor Oil Balancing >> Balancing Procedure

Balancing Procedure

WARNING: This page is about a different car, the 2007 Saturn Vue. 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.
  1. The replacement compressors for vehicles equipped with L61 and L66 engines are shipped with 120 ml (4.0 oz) of refrigerant oil.
  2. The replacement compressor for vehicles equipped with the LAT engine is shipped with 74 ml (2.5 oz) of refrigerant oil.
    3. Fig 1: Draining A/C Refrigerant Oil From Compressor
    GM821777Courtesy of GENERAL MOTORS CORP.
  3. Before installing the compressor, the refrigerant oil may have to be partially drained:
    1. Refer to the amount of refrigerant oil recorded during the compressor removal.
    2. Subtract the amount recorded from the total system capacity. Refer to Refrigerant System Capacities . The difference between the total system capacity and the recorded amount is the calculated amount to be drained from the replacement compressor.
  4. Drain the calculated amount of refrigerant oil from the replacement compressor.
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