High Pressure Safety Valve HVAC: Service and Repair
Compressor Pressure Relief Valve ReplacementREMOVAL PROCEDURE
IMPORTANT
^ Discharge and recover the A/C system refrigerant, and remove the compressor from the vehicle, before performing compressor repairs.
^ During service of the compressor, prevent 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.
^ Clean all parts that you will reassemble with a suitable solvent, and air-dry the parts.
^ Use only lint-free cloths in order to wipe the parts.
^ Drain and discard the oil that remains in the compressor. Add 90 ml (3.0 fl oz) of new refrigerant oil when the repairs are complete.
1. Inspect for signs of refrigerant leakage. Replace the pressure relief valve if the valve is open.
2. Discharge and recover the refrigerant. Refer to Refrigerant Recovery and Recharging. Service and Repair
3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in Vehicle Lifting.
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 mineral base 525 viscosity refrigerant oil.
2. Install the O-ring on the pressure relief valve (2).
NOTE: Refer to Fastener Notice in Service Precautions.
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.
5. Evacuate and recharge the Air Conditioning (A/C) system. Refer to Refrigerant Recovery and Recharging. Service and Repair
6. Operate the A/C system, and test the system for refrigerant leaks. Refer to Leak Testing. Leak Testing