Compressor Pressure Relief Valve Replacement. Chevrolet Metro 1998

For 1990-2009 cars

### Removal Procedure

Important:

• | When servicing the compressor, keep dirt and other foreign material from getting on the compressor parts and into the system Clean tools and a clean work area are essential for proper service. Keep the compressor and the parts clean at all times. Any parts which are to be reassembled should be cleaned with Trichloroethane, naphtha, kerosene, or an equivalent solvent. Air dry the parts and wipe clean with a lint-free cloth.

• | All repairs and procedures for the compressor must be performed after the A/C system refrigerant has been discharged and recovered, and after the compressor has been removed from the vehicle.

• | When the compressor is removed from the vehicle for servicing, drain and discard the oil remaining in the compressor. Add 90 cc (3.0 fl oz) of new refrigerant oil when the repairs are complete.

1. Replace the pressure relief valve if it is open. Inspect for signs of refrigerant leakage.
2. Discharge and recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
4. Remove the pressure relief valve (2) from the compressor.
5. Discard the O-ring (3).

### Installation Procedure

1. Lubricate the O-ring (3) with 525 viscosity mineral oil.
2. Install the O-ring on the pressure relief valve (2).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Install the pressure relief valve to the compressor.

Tighten
Tighten the pressure relief valve to 12-18 N·m (8.8-13 lb ft).

4. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
5. Evacuate and recharge the air conditioning (A/C) system. Refer to Refrigerant Recovery and Recharging .
6. Operate the A/C system and inspect for refrigerant leaks. Refer to Leak Testing .