OEM Chevrolet Express 1500 A/C Orifice Tube

Chevrolet Express 1500 A/C Orifice Tube Parts Questions & Experts Answers

• Evaporator Core Connector
  3033879
  Q: How to replace the A/C Orifice Tube in an A/C system on Chevrolet Express 1500?

  A:

  The initial step for replacing the A/C Orifice Tube requires the recovery of a/c system refrigerant. Before starting to replace the A/C Orifice Tube, it's necessary to remove the Evaporator hose retaining nut from the Evaporator and then utilize the orifice tube remover and installer (J 26549-E). The A/C Orifice Tube will become loose if you carefully apply heat to the inlet pipe dimples through a heat gun or hair dryer at 7 mm (0.25 in) distance. Avoid overheating the pipe during this process. During heat application, the orifice tube remover and installer (J 26549-E) should be used to grip the A/C Orifice Tube so you can loosen it through a combination of turning and pushing while pulling motions. Use the orifice tube remover and installer (J 26549-E) to install the A/C Orifice Tube but start with the shorter screen end on the Evaporator while applying 525 viscosity refrigerant oil for sealing. After installing new washer seals on the Evaporator tube, you should connect the Evaporator hose to the Evaporator before tightening the retaining nut to 16 n.m (12 lb ft). Ending the process involves evacuation of the a/c system followed by recharging through the procedure together with a halogen leak detector (J 39400-A) check for component fittings.