GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Park Avenue 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 Handling of Refrigerant Lines and Fittings

A/C Refrigerant Lines
Object Number: 247084 Size: MF
(1)Expansion Tube
(2)High Side Service Fitting
(3)Evaporator Fitting
(4)Dual O-ring Joint
(5)Condenser Fitting
(6)Low Side Service Fitting
    • Ensure that all metal tubing lines are free of dents or kinks in order to prevent loss of system capacity due to line restriction.
    • Do not bend the flexible hose lines to a radius of less than 4 times the diameter of the hose.
    • Ensure that the flexible hose lines are not closer than 63.5 mm (2.5 in) to the exhaust manifold.
    • Inspect the flexible hose lines regularly for leaks or brittleness. Replace any deteriorated or leaking lines.
    • Discharge the refrigeration system of all R-134a before disconnecting any fitting in the system. Refer to Refrigerant Recovery and Recharging .
    • Immediately cap or tape a refrigerant line after opening the line to the atmosphere in order to prevent entry of moisture and dirt.
    • Tighten all tubing connections to the specified torque for the fitting. Refer to Fastener Tightening Specifications .
    • The O-rings and the seats must be in perfect condition. A burr or a piece of dirt may cause a refrigerant leak. Lubricate the new O-rings using mineral base 525 viscosity refrigerant oil. DO NOT use Polyalkylene Glycol (PAG) refrigerant oil.
    • DO NOT apply (PAG) oil to the fitting threads. Long term contact of PAG oil on threads may cause future disassembly difficulties. Flush the threads of the fittings using mineral base 525 viscosity refrigerant oil.
    • PAG oil will damage painted surfaces.