OEM 2004 Buick Park Avenue A/C Orifice Tube

2004 Buick Park Avenue Parts Questions & Experts Answers

• Q: How to replace the A/C Orifice Tube in an A/C system on 2004 Buick Park Avenue?

  A: The replacement of expansion devices (A/C Orifice Tubes) should start with refrigerant recovery followed by evaporator tube removal from its retaining clips and connecting nuts. For expansion tube replacement you must divide the evaporator tube at its location near the A/C Orifice Tube then pull the A/C Orifice Tube off the liquid line. The installation procedure begins with placing the short screen toward the evaporator and applying mineral base 525 viscosity refrigerant oil on the A/C Orifice Tube O-ring before its insertion into the evaporator tube. Attach the A/C evaporator tube by tightening the dual O-ring joint nut to 24 N.m (18 lb ft) and after that route the tube through retaining clips. The A/C system will receive a recharge after which a leak test must be performed on the component fittings using Halogen Leak Detector (J 39400-A).