Accumulator HVAC: Service and Repair

ACCUMULATOR REPLACEMENT

TOOLS REQUIRED
J 39400-A Halogen Leak Detector

REMOVAL PROCEDURE

IMPORTANT: The accumulator assembly service replacement part includes O-rings, as needed, for connections. The desiccant within the shell is NOT serviced separately. The desiccant is part of the sealed accumulator assembly.




1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
2. Remove the right front fender liner.
3. Remove the nut holding the compressor hose to the accumulator.
4. Remove the compressor hose from the accumulator.
5. Remove and discard the seal washer.
6. Remove the evaporator hose nut from the accumulator.
7. Remove the evaporator hose from the accumulator.
8. Remove and discard the seal washer.
9. Remove the accumulator bracket bolt.
10. Remove the accumulator with the bracket from the vehicle.




11. Remove the accumulator from the insulator and the bracket.

INSTALLATION PROCEDURE




1. Install the insulator and the bracket to the accumulator.

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 88900060).

IMPORTANT: You must add refrigerant oil to a NEW accumulator.

2. Add the required amount of new refrigerant oil to a new accumulator. Refer to Refrigerant System Capacities (LA1) or Refrigerant System Capacities (L61).

NOTE: Refer to Fastener Notice in Service Precautions.




3. Install the accumulator bracket and bolt to the vehicle.

Tighten
Tighten the accumulator bracket bolt to 10 N.m (89 lb in).

4. Install a new seal washer.
5. Install the compressor hose assembly to the accumulator.
6. Install the compressor hose assembly nut to the accumulator.

Tighten
Tighten the nut to 25 N.m (18 lb ft).

7. Install a new seal washer.
8. Install the evaporator hose to the accumulator.
9. Install the evaporator hose nut to the accumulator.

Tighten
Tighten the nut to 25 N.m (18 lb ft).

10. Install the right front fender liner.
11. Lower the vehicle.
12. Recharge the refrigerant system. Refer to Refrigerant Recovery and Recharging.
13. Leak test the fittings of the component using the J 39400-A.

For a description of the RPO Code(s) shown in this article/image, refer to the RPO Code List found at Vehicle/Application ID. RPO Codes