Compressor HVAC: Service and Repair

82.10.20 Compressor - V8

Before disconnecting the battery, ensure all text and cautions in the battery disconnection section are observed.

Remove
1. Position vehicle on lift.
2. Disconnect battery earth lead.
3. Recover refrigerant from A/C system.

Receiver drier need only be changed under the following circumstances. There is dirt in the refrigerant circuit ( e.g. compressor seizure ). The system is leaking and refrigerant has been lost to atmosphere. Refrigerant circuit has been open more than 24 hours due to repair.

4. Remove air intake pipe.





5. Remove A/C compressor drive belt.
6. Remove 2 bolts securing A/C compressor drive belt adjusting plate to sump.
7. Position A/C tensioner toward crankshaft pulley to aid removal of A/C compressor.





8. Disconnect multiplug from A/C compressor.





9. Remove bolt securing rear of A/C compressor to mounting.
10. Remove 2 Allen bolts securing A/C pipes to A/C compressor. Release pipes from A/C compressor.

CAUTION: Always fit plugs to open connections to prevent contamination.

11. Remove and discard 'O' rings from A/C pipes.





12. Remove 2 bolts securing A/C compressor to mounting.

NOTE: Top securing bolt needs to stay located into compressor on removal and installation.

13. Remove A/C compressor.

Refit
1. If a new compressor is being installed, drain the required amount of refrigerant oil from the new compressor.
2. Ensure mating faces of A/C pipes and A/C compressor are clean.
3. Clean A/C compressor and mounting bracket mating faces.
4. Fit A/C compressor to mounting bracket. Fit 3 securing bolts.

NOTE: Top securing bolt needs to stay located into compressor on removal and installation.

5. Evenly and progressively tighten A/C compressor mounting bolts to 25 Nm (18 lbf.ft).
6. Lubricate new 'O' rings with clean refrigerant oil and fit to evaporator pipes.
7. Position A/C pipes to A/C compressor, fit bolts and tighten to 22 Nm (16 lbf.ft).
8. Connect multiplug to A/C compressor.
9. Tighten 2 bolts securing compressor drive belt tensioner to 25 Nm (18 lbf.ft).
10. Fit A/C compressor drive belt.
11. Fit air intake pipe.
12. Recharge A/C system.
13. Connect battery earth lead.