Compressor Replacement

REMOVAL PROCEDURE




1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
2. Remove the drive belt.
3. Disconnect the electrical connector from the compressor.
4. Remove the bolt holding the compressor hose assembly to the compressor.




5. Remove the hose assembly from the compressor.
6. Remove and discard the sealing washers.
7. Remove the compressor mounting bolts.
8. Remove the compressor.
9. If replacing the compressor, drain and measure as much of the oil from the compressor as possible using the following procedure:
9.1. Drain the oil from both the suction and the discharge ports into a clean container.
9.2. Remove the compressor crankcase oil drain plug and drain the crankcase oil into the same container.
9.3. Measure and record the amount of oil drained from the compressor. This measurement will be used during the compressor installation procedure.
9.4. Properly discard the used PAG oil.

INSTALLATION PROCEDURE

NOTE: Do not mix refrigerant oils. Use of incorrect refrigerant oil will cause compressor failure.

The CVC compressor uses a low viscosity refrigerant oil, GM P/N 12378526 (Canadian P/N 88900060).

IMPORTANT: NEW CVC compressor assemblies are shipped with a full poly-alkylene glycol (PAG) refrigerant oil charge. Use of the incorrect PAG oil can result in compressor failure.




1. Drain the PAG oil from the new compressor into the clean calibrated measuring container. Drain from the crankcase and from the rear head ports.
^ If the amount of old oil drained is less than or equal to 75 ml (2.5 oz), add 75 ml of new oil into the new compressor through the crankcase bolt hole.
^ If the amount of old oil drained is greater than 75 ml (2.5 oz), add the equivalent amount of new oil into the new compressor through the crankcase bolt hole. Refer to Refrigerant System Capacities (LN2, LD9) or Refrigerant System Capacities (L61).

NOTE: Refer to Fastener Notice in Service Precautions.

2. Install the crankcase oil drain bolt to the compressor.

Tighten
Tighten the drain bolt to 16 N.m (12 lb ft).

3. Rotate the clutch driver 3 times to lubricate the internal swashplate and the piston shoes.
4. Install the bolts and the compressor to the engine.

Tighten
Tighten the bolts to 22 N.m (16 lb ft).




5. Install NEW sealing washers on the compressor ports.
6. Install the compressor hose assembly.
7. Install the compressor hose assembly nut.

Tighten
Tighten the nut to 16 N.m (12 lb ft).




8. Connect the compressor electrical connector.
9. Install the drive belt.
10. Lower the vehicle.
11. Evacuate and charge the refrigerant system. Refer to Refrigerant Recovery and Recharging.