Draining Procedure

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Drain and measure as much of the refrigerant oil as possible from the rear head ports of the REMOVED compressor.

Drain the refrigerant oil from the crankcase and rear head ports into a clean, graduated container.

Fig 1: Draining A/C Refrigerant Oil From Compressor

Courtesy of GENERAL MOTORS COMPANY

Rotate the compressor shaft to assist in draining the compressor.
Measure and record the amount of oil drained from the removed compressor.
This measurement will be used during installation of the replacement compressor.
Inspect oil drained from removed compressor. Refer to Air Conditioning Compressor Oil Diagnosis
Properly discard the used refrigerant oil.
Clean the graduated cylinder.

NOTE:

Drain and measure as much of the refrigerant oil as possible from the rear head ports of the NEW compressor.

Remove the drain bolt and drain the refrigerant oil from the crankcase and rear head ports into a clean, graduated container.
Rotate the compressor shaft to assist in draining the compressor.