C 2500 Truck 2WD V8-6.5L DSL Turbo VIN S (1997)
A/C Coupler O-ring: Service Precautions
O-Ring Replacement
Install new GM-approved service replacement air conditioning O-ring seals whenever a joint or fitting is installed, except when the O-ring seals are
provided on new replacement components. 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.
Coat air conditioning O-ring seals with 525 viscosity refrigerant oil just before installation and slip them onto the flange tube to ensure proper locating
and sealing. To prevent the possibility of swelling and a reduction in sealing effectiveness, do not soak O-ring seals in refrigerant oil. Before installation,
examine O-ring seals and fittings to make sure they have not been nicked or deformed. Replace nicked or deformed pans to prevent refrigerant leakage.
