High Pressure Safety Valve HVAC: Service and Repair

COMPRESSOR PRESSURE RELIEF VALVE REPLACEMENT

TOOLS REQUIRED
J 39400-A Halogen Leak Detector

REMOVAL PROCEDURE
1. Recover the refrigerant from the A/C system.




2. Raise and support the vehicle. Refer to Vehicle Lifting.
3. Remove the air baffle bolts.
4. Remove the air baffle.




5. Remove the suction hose to A/C compressor nut.
6. Disconnect the suction hose from the A/C compressor.

IMPORTANT: Immediately cap or tape the open A/C components immediately in order to prevent contamination.

7. Remove and discard the seal washer and position the suction hose aside.
8. Cap or tape the A/C compressor suction port and suction hose end fitting.
9. Lower the vehicle.




10. Remove the high pressure relief valve from the A/C compressor.

INSTALLATION PROCEDURE
1. Lubricate the high pressure relief valve O-ring.




2. Install the high pressure relief valve to the A/C compressor.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten
Tighten the valve to 12 N.m (9 lb ft).

3. Raise and support the vehicle.
4. Remove the cap or tape from the A/C compressor suction port and suction hose end fitting.
5. Install a new seal washer to the suction hose end fitting.




6. Connect the suction hose to the A/C compressor.
7. Install the suction hose to A/C compressor nut.

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

8. Install the air baffle.




9. Install the air baffle bolts.

Tighten
Tighten the bolts to 20 N.m (15 lb ft).

10. Lower the vehicle.
11. Evacuate and recharge the A/C system.
12. Leak test the fittings of the component using J 39400-A.