A/C Coupler O-ring: Service and Repair

O-Ring Replacement

1. Follow the instructions in Refrigerant Recovery for the unit being serviced. Refer to Refrigerant Recovery and Recharging Refrigerant Recovery and Recharging.
2. Install new GM-approved service replacement air conditioning O-ring seals whenever a joint or fitting is installed. When the O-ring seal are provided on new replacement components, use these provided O-ring seals. Unless service replacement O-ring seals bearing the specified part numbers are used, excessive leakage of Refrigerant-134a may occur. Refer to the part number for identification.
3. Coat air conditioning O-ring seals with 525 viscosity refrigerant oil just before installation. Slip the air conditioning O-ring seals onto the flange tube in order to ensure proper locating and sealing. In order to prevent the possibility of swelling and a reduction in sealing effectiveness, do not soak the O-ring seals in refrigerant oil.
4. Examine O-ring seals and fitting before installation in order to ensure that the parts are not nicked or deformed. Replace nicked or deformed parts in order to prevent leakage.