Compressor HVAC: Service and Repair

NOTE: When a compressor is replaced, the oil must be drained from the old compressor and measured. Drain all the oil from the new compressor, then fill the new compressor with the same amount of oil that was drained out of the old compressor.

NOTE: The compressor may be removed and repositioned without disconnecting the refrigerant lines or discharging the refrigerant system. Discharging is not necessary if servicing the compressor clutch or clutch coil, the engine, the cylinder head, or the generator

WARNING: Review the Service Precautions before leak testing the system.

REMOVAL
1. Disconnect and isolate the battery negative cable.
2. Loosen and remove the serpentine driver belt. Refer to - Cooling System for the procedures.
3. Unplug the compressor clutch coil wire harness connector.
4. Recover the refrigerant from the refrigerant system.
5. Remove the refrigerant lines from the compressor. Install plugs in, or tape over all of the open refrigerant fittings.
6. Remove the bolts that secure the compressor to the mounting bracket, and lift the compressor from the mounting bracket.

CAUTION: If a replacement compressor is being installed, be certain to check the oil level.

INSTALLATION
1. If the compressor mounting bracket was removed, install the bracket to the engine. Tighten the mounting bolts to 27 N.m (20 ft. lbs.).
2. Install the compressor on the mounting bracket. Tighten the bolts to 27 N.m (20 ft. lbs.).
3. Remove the tape or plugs from all of the refrigerant fittings, and install the refrigerant lines on the compressor.
4. Install the serpentine drive belt.
5. Plug in the compressor clutch coil wire harness connector.
6. Connect the battery negative cable.
7. Evacuate and charge the refrigerant system.