Compressor HVAC: Service and Repair

REMOVAL
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.

1. Recover the refrigerant from the refrigerant system.
2. Disconnect and isolate the battery negative cable.
3. Remove the serpentine drive belt.
4. Unplug the compressor clutch coil wire harness connector.
5. Remove the suction and discharge refrigerant line manifold from the compressor. Install plugs in, or tape over all of the opened refrigerant fittings.

Fig.1 Compressor Remove/Install - 5.9L:

Fig.2 Compressor Remove/Install - V8 ENGINE - Left View:

Fig.3 Compressor Remove/Install - V8 ENGINE - Right View:

6. Remove the four screws that secure the compressor to the mounting bracket, or
7. Remove the compressor from the mounting bracket.

INSTALLATION

NOTE: If a replacement compressor is being installed, be certain to check the refrigerant oil level. See Refrigerant Oil Level in the Service Procedures. Use only refrigerant oil of the type recommended for the compressor in the vehicle.

1. Install the compressor to the mounting bracket. Tighten the four mounting screws to 27 Nm (20 ft. lbs.).
2. Remove the tape or plugs from all of the opened refrigerant line fittings. Install the suction and discharge line manifold to the compressor.
3. Install the serpentine drive belt.
4. Plug in the compressor clutch coil wire harness connector.
5. Connect the battery negative cable.
6. Evacuate the refrigerant system.
7. Charge the refrigerant system.