OEM 2006 Buick Rendezvous A/C Expansion Valve

2006 Buick Rendezvous A/C Expansion Valve Parts and Q&A

• Q: How to replace the A/C Expansion Valve in a system on 2006 Buick Rendezvous?

  A: The first step for thermal expansion valve (TXV) replacement begins with proper procedures to recover refrigerant from the a/c system. Circumvent heat hoses first then remove the vacuum hose from the Brake Booster before its repositioning. Begin by loosening the Evaporator outlet tube to txv nut before detaching the Evaporator outlet tube from the txv as well as from the Evaporator inlet tube. The technician should immediately discard the sealing washers and cap or apply tape over the a/c refrigerant tubes to avoid contamination. Take out the txv from the Evaporator core by executing the txv to Evaporator bolt removal and discard both sealing washers before capping or taping off the Evaporator core. Place new sealing washers on the Evaporator core and secure the txv to the core with txv to Evaporator bolts that should be tightened to 3.2 n.m (28 lb in). First remove the tape or cap from the a/c refrigerant tubes then install sealing washers to each tube before connecting the Evaporator outlet to the Evaporator inlet then proceed with connecting the Evaporator tubes to the txv. Tighten the Evaporator outlet tube nut to 16 n.m (12 lb ft). The vacuum hose should be reconnected to the Brake Booster before realigning the heater hoses to perform an a/c system evacuation and recharge process. The last step includes conducting a leak test of component fittings using the halogen leak detector (J 39400-A).