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A/C Compressor Oil Checking: BOSCH: 6-Cylinder

  1. Before checking and adjusting oil level, operate compressor at engine idle speed, and set controls at maximum cooling and high blower motor speed for 20-30 minutes to return oil to compressor.
  2. Stop engine and discharge refrigerant. See SERVICING PRECAUTIONS at beginning of article. Remove refrigerant oil level inspection plug on side of compressor. Oil should be at lower lip of threaded hole. If oil level is low, add new refrigerant oil as necessary. Replace inspection plug and tighten to 10-12 ft. lbs. (14-16 N.m).