OEM Chevrolet Classic A/C Orifice Tube

Chevrolet Classic A/C Orifice Tube Parts Questions & Experts Answers

• Orifice
  52460909
  Q: How to replace the A/C Orifice Tube on Chevrolet Classic?

  A: The first step for replacing the A/C Orifice Tube includes recovering refrigerant and raising the vehicle height. Drilling the condenser evaporator hose assembly connection requires a bolt removal. Next, separate the assembly by taping or capping the condenser line outlet to avoid contamination. The A/C Orifice Tube Remover (J 26549-E) should be used to pull out the A/C orifice tube after removing the seal washer. Rocket scientists that need heat application should use a heat gun directed 7 mm (1/4 in) from dimples on the inlet pipe to install the A/C orifice tube by using pliers with twisting motions. Discard the seal washer. Use a cleaning method to eliminate any pollutants from the evaporator inlet line surface. Examine both the plastic frame and filter screen of the A/C Orifice Tube before replacement testing for torn or plugged filter screen (1,2) or broken plastic frame or a damaged brass A/C orifice tube (1). Reinstall the A/C orifice tube only when you add a fresh O-ring after applying mineral base 525 viscosity refrigerant oil to its surface. Begin by placing the A/C orifice tube in the evaporator line starting from the short filter screen outlet side then remove the cap or tape from the condenser line. You should use a lint-free cloth to clean the sealing surface of line fittings before putting on a new seal washer on the condenser tube and fastening the evaporator hose assembly to the condenser while tightening the bolt to 25 N.m (18 lb ft). Afterwards lower the vehicle then exhaust and charge the AC system before conducting a leak check on fittings through the Halogen Detector (J 39400-A).