Tools Required

J 39400-A Halogen Leak Detector

1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.



3. Remove pressure relief valve from compressor hose.

Important: Use R-12 refrigerant oil (mineral) to lubricate O-rings. Use of R-134a (PAG) oil will cause premature corrosion of fitting joints.

1. Lubricate the pressure relief valve O-ring with new R-12 mineral compressor oil. Refer to O-Ring Replacement .

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.

2. Install the pressure relief valve to the compressor hose.

Tighten
Tighten the pressure relief valve to 10 N·m (89 in ft).

3. Lower the vehicle.
4. Evacuate and charge the A/C system. Refer to Refrigerant Recovery and Recharging .
5. Test the affected A/C joint for leaks using J 39400-A .