S15/T15 Sonoma P/U 2WD L4-2.2L VIN 4 (1995)
A/C Coupler O-ring: Service Precautions
REPLACING O-ring SEALS
Install new GM-approved service replacement air conditioning O-ring seals whenever a joint or fitting is installed1 except when the O-ring seals are
provided on new replacement components. Unless service replacement Of-ring seals bearing the specified part numbers are used, excessive leakage of
Refrigerant-134a may occur. Refer to the part number for identification.
Air conditioning O-ring seals should be coated with 525 viscosity refrigerant oil just before installation and should be slipped onto the flange tube to
ensure proper locating and sealing. To prevent the possibility of swelling and a reduction in sealing effectiveness, O-ring seals should not be soaked in
refrigerant oil. Before installation, O-ring seals and fittings should be examined to ensure they have not been nicked or deformed. Replace nicked or
deformed parts to prevent refrigerant leakage.
