Air Conditioning Compressor Replacement

Air Conditioning Compressor Replacement (LNJ) (3.4L)

Special Tools

J 39400-A Halogen Leak Detector

Removal Procedure

1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging (Refrigerant Recovery and Recharging).
2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (Service and Repair).
3. Remove the accessory drive belt from the compressor pulley. Refer to Drive Belt Replacement (Service and Repair).
4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).




5. Remove the compressor hose nut from the compressor.
6. Remove the compressor hose from the compressor.
7. Disconnect the electrical connector from the compressor.
8. Remove and discard the seal washers from the compressor. Refer to Sealing Washer Replacement (Sealing Washer Replacement).
9. Install a shipping cap on the compressor hose to prevent moisture/contamination.




10. Install shipping cap to the compressor (2) prior to removal to prevent spillage of oil and contamination.
11. Remove the compressor bolts (3, 4, 5) from the compressor.
12. Remove the spacer bracket (1) from the compressor.
13. Remove the compressor (2) from the vehicle.
14. If replacing the compressor (2), balance the oil. Refer to Air Conditioning Compressor Oil Balancing (Service and Repair).

Installation Procedure




1. Add the proper amount of polyalkylene glycol (PAG) oil to the compressor (2). Refer to Refrigerant System Capacities ([1][2]Capacity Specifications).
2. Install caps on compressor (2) to prevent spillage during installation.
3. Install the compressor (2) to the vehicle.
4. Install the spacer bracket (1) between the engine and the compressor (2).

Caution: Refer to Fastener Caution (Fastener Caution).

5. Install the compressor bolts to the compressor (2). Tighten the bolts in sequence.

* Tighten the bolt (5) to 50 Nm (37 lb ft).
* Tighten the bolt (3) to 50 Nm (37 lb ft).
* Tighten the bolt (4) to 50 Nm (37 lb ft).

6. Remove the shipping cap from the compressor (2) and the compressor hose.
7. Connect the electrical connector to the compressor (2).




8. Install new seal washers to the compressor. Refer to Sealing Washer Replacement (Sealing Washer Replacement).
9. Install compressor hose to the compressor.

Caution: Refer to Compressor Hose Clearance to the Exhaust Gas Circulation Pipe Caution (Vehicle Damage Warnings).

10. Position the compressor hose to the compressor and tighten the nut to 20 Nm (15 lb ft).
11. Lower the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).
12. Install the accessory drive belt to the compressor pulley. Refer to Drive Belt Replacement (Service and Repair).
13. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (Service and Repair).
14. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging (Refrigerant Recovery and Recharging).
15. Test the affected A/C joints for leaks using J 39400-A .