OEM 2002 Buick Park Avenue A/C Orifice Tube

2002 Buick Park Avenue Parts Questions & Experts Answers

• Q: How to replace the A/C Orifice Tube in an A/C system on 2002 Buick Park Avenue?

  A: The first step in replacing the A/C orifice tube includes recovering all refrigerant. Release the evaporator tube from its clips before untightening the tube nut and separating it from the A/C orifice tube position. The A/C orifice tube must be extracted before it can be removed from the liquid line. Installation of the new A/C orifice tube requires O-ring lubrication with mineral base 525 viscosity refrigerant oil while the short screen needs to point toward the evaporator. Fit the A/C evaporator tube while tightening its dual O-ring joint nut to 24 N.m (18 lb ft). The A/C evaporator tube needs to be reattached to retaining clips followed by A/C system recharging and conducting leak tests on component fittings with the Halogen Leak Detector (J 39400-A).