K 3500 Truck 4WD V8-5.7L VIN R (1998)
High Pressure Safety Valve HVAC: Service and Repair
Pressure Relief Valve
Compressor - Rear Head
Remove or Disconnect
1. Recover the refrigerant using J 39500-GM.
2. Remove old pressure relief valve.
Install or Connect
1. Clean valve seat area on rear head.
2. Lubricate O-ring of new pressure relief valve and O-ring assembly with new 525 viscosity refrigerant oil. Install new valve and torque in place, 9.0
N.m (6.1 lbs. ft.).
3. Evaluate and recharge the system.
4. Leak test system.
