O-Ring Replacement
0-RING REPLACEMENTInstall new GM approved service replacement air conditioning 0-rings whenever a joint or fitting is disassembled, except when provided on new components. Even though an 0-ring may look the same, it is extremely important that only recommended service replacement air conditioning 0-rings be used or excessive leakage of Refrigerant may occur.
When replacing 0-rings on an air conditioning component or joint connection, the fitting design should be carefully identified to ensure installation of the correct air conditioning service replacement 0- ring. Use a non-metal tool (i.e. plastic pick) to remove 0-rings to avoid damaging the mating surface on the fitting. 0-rings should be coated with 525 viscosity refrigerant oil prior to installation, but must not be soaked.
Prior to installation, verify that both 0-rings and fittings have not been nicked or deformed. Deformed or nicked parts must be replaced. Failure to use the proper service replacement parts and procedures may result in excessive Refrigerant leakage.