Compressor HVAC: Service and Repair

Fig.39 A/C Refrigerant Lines - Compressor:

The compressor may be removed from the mounting bracket 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 WARNINGS AND CAUTIONS BEFORE PERFORMING THE FOLLOWING OPERATION.

REMOVAL
1. Recover the refrigerant from the refrigerant system. Refer to Refrigerant Recovery for the proper procedures.
2. Disconnect and isolate the battery negative cable.
3. Raise and support the vehicle.
4. Remove the serpentine drive belt. Refer to Cooling System for the proper procedures.

Fig.38 A/C Compressor Remove/Install:

5. Disconnect the engine wire harness connectors from the compressor clutch coil connector and the high pressure cut out switch.
7. Disconnect the suction line fitting from the compressor suction port.
8. Remove the rubber O-ring seal from the refrigerant line fitting of the suction line and discard.
9. Install plugs in, or tape over the opened compressor suction port and the refrigerant line fitting of the suction line.
10. Remove the screw that secures the discharge line fitting to the compressor discharge port.
11. Disconnect the discharge line fitting from the compressor discharge port.
12. Remove the rubber O-ring seal from the refrigerant line fitting of the discharge line and discard.
13. Install plugs in, or tape over the opened compressor discharge port and the refrigerant line fitting of the discharge line.
14. Remove the four screws that secure the compressor to the lower front strut-to-engine bracket.
15. Remove the compressor from the engine compartment.

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 compressor into the engine compartment.
2. Install and tighten the four screws that secure the compressor to the lower front strut-to-engine bracket.Tighten the screws to 28.3 Nm (250 in. lbs.).
3. Remove the tape or plugs from the compressor discharge port and the refrigerant line fitting of the discharge line.
4. Lubricate a new rubber O-ring seal with clean refrigerant oil and install it on the refrigerant line fitting of the discharge line. 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 compressor in the vehicle.
5. Reconnect the discharge line fitting to the compressor discharge port.
6. Install and tighten the screw that secures the discharge line fitting to the compressor discharge port. Tighten the screw to 12.2 Nm (108 in. lbs.).
7. Remove the tape or plugs from the compressor suction port and the refrigerant line fitting of the suction line.
8. Lubricate a new rubber O-ring seal with clean refrigerant oil and install it on the refrigerant line fitting of the suction line. 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 compressor in the vehicle.
9. Reconnect the suction line fitting to the compressor suction port.
10. Install and tighten the screw that secures the suction line fitting to the compressor suction port. Tighten the screw to 12.2 Nm (108 in. lbs.).
11. Reconnect the engine wire harness connectors to the compressor clutch coil connector and the high pressure cut out switch.
12. Reinstall the serpentine drive belt. Refer to Cooling System for the proper procedures.
13. Lower the vehicle.
14. Reconnect the battery negative cable.15. Evacuate the refrigerant system. Refer to Refrigerant System Evacuate for the proper procedures.
15. Charge the refrigerant system. Refer to refrigerant System Charge for the-proper procedures.