Installation Procedure

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 old compressor into the clean calibrated measuring container. Drain from the crankcase and from the rear head ports. Record the amount of oil removed from the old compressor.
   Fig 1: Removing Drain Plug From Compressor

   Courtesy of GENERAL MOTORS CORP.
2. 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 from the old compressor 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 from the old compressor 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  .
   NOTE: Refer to FASTENER NOTICE .
3. Install the crankcase oil drain bolt to the compressor.

   Tighten 

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

4. Rotate the clutch driver 3 times to lubricate the internal swashplate and the piston shoes.
5. Install the compressor to the vehicle. Secure the compressor with the 2 lower mounting bolts (4).
   Fig 2: Installing Compressor

   Courtesy of GENERAL MOTORS CORP.

   Tighten 

   Tighten the compressor lower mounting bolts to 25 N.m (18 lb ft).

6. Install the engine splash shield. Refer to SPLASH SHIELD REPLACEMENT - ENGINE - RIGHT in Body Front End.
7. Lower the vehicle.
8. Install the compressor upper mounting bolt (8).

   Tighten 

   Tighten the compressor upper mounting bolt to 25 N.m (18 lb ft).

9. Install new O-rings (5) lubricated with mineral base 525 viscosity refrigerant oil to the compressor and condenser hose assembly.
10. Install the compressor and condenser hose assembly (6) to the compressor. Secure with the bolt (7).

    Tighten 

    Tighten the compressor and condenser hose assembly bolt (7) to 25 N.m (18 lb ft).

11. Connect the compressor clutch electrical connector (2).
12. Install the compressor serpentine drive belt.
    Fig 3: Installing Compressor Serpentine Drive Belt

    Courtesy of GENERAL MOTORS CORP.
13. Evacuate and recharge the A/C system. Refer to REFRIGERANT RECOVERY AND RECHARGING  .
14. Operate the A/C system and test for refrigerant leaks. Refer to LEAK TESTING  .