Compressor HVAC: Service and Repair

REMOVAL

WARNING: REVIEW THE WARNINGS AND CAUTIONS IN THE FRONT BEFORE PERFORMING THE FOLLOWING OPERATION.

1. Recover the refrigerant from the refrigerant system .
2. Disconnect and isolate the negative battery cable.
3. Remove the serpentine drive belt.
4. Disconnect the compressor clutch coil wire harness connector.
5. Depending on the engine usage, remove the bolts or nuts that secure the suction and discharge line fittings to the compressor. Discard the O-ring seals and install plugs in, or tape over all of the opened refrigerant line fittings and compressor ports.

A/C Compressor - 2.4L Engine:

A/C Compressor - 3.7L Shown, 4.7L Typical:

A/C Compressor - 2.5L/2.8L Diesel Engine:

6. Remove the bolts that secure the compressor to the engine.

INSTALLATION

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

1. Position the A/C compressor into the engine compartment.
2. On the 3.4L gasoline and 3.5L/3.8L diesel engines, install and tighten the mounting bolts to 27 Nm (20 ft. Lbs.).
3. On the 3.7L gasoline engine install all mounting bolts hand tight, then tighten the mounting bolts in the following sequence:
- The rear bolt to 55 Nm (41 ft. Lbs.).
- The front inboard bolt to 40 Nm (30 ft. Lbs.).
- The front outboard bolt to 55 Nm ( 41 ft. Lbs.).

4. Remove the tape or plugs from the opened refrigerant line fittings and compressor ports.
5. Lubricate new rubber O-ring seals with clean refrigerant oil and install them on the discharge and suction line fittings. Use only the specified O-rings as they are made of a special material for the R-134a system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
6. Install the suction line and discharge line fittings onto the compressor.
7. Install the bolts or nuts (depending on engine application) that secure the suction and discharge line fittings to the compressor. Tighten the bolts or nuts to 28 Nm (20 ft. Lbs.).
8. Connect the wire harness connector to the compressor clutch coil.
9. Install the serpentine drive belt.
10. Connect the compressor clutch coil wire harness connector.
11. Reconnect the negative battery cable.
12. Evacuate the refrigerant system.
13. Charge the refrigerant system.