GM Celebrity/Century/Ciera/6000 1982-1996 Repair Guide

Expansion Tube Orifice

Print

Metal chips, flakes or silvers found on the expansion tube screen can usually be blown out with shop air once the tube is removed. Replace the tube only if one or more of the conditions is noticed:



The plastic frame is broken
 
The brass orifice tube is damaged or plugged
 
The screen material is torn
 
The screen is plugged with fine or gritty materials
 

Special tools will be needed for this procedure: orifice tool remover J-26549-C and extractor J-26549-D, or their equivalents.

REMOVAL & INSTALLATION



See Figures 1 and 2

  1. Properly discharge the air conditioning system into a recovery/recycling machine.
  2.  
  3. Raise and support the vehicle.
  4.  
  5. Disconnect the fitting, and the liquid line from the condenser outlet.
  6.  

Cap the refrigerant lines when opening the system to prevent the entry of dirt and moisture and the loss of refrigerant lubricant.



Click image to see an enlarged view

Fig. Fig. 1: Common location of an orifice in the A/C system

  1. Remove the expansion tube (orifice) using the orifice remover. In the event of any difficulty in removal of a restricted or plugged tube (orifice), do the following:
    1. Remove as much of any impacted residue as possible.
    2.  
    3. If the system has a pressure switch near the orifice tube location, it should be removed prior to the next step. This will prevent any damage to occur to the switch.
    4.  
    5. Carefully apply heat with a heat gun (hair drier) approximately 1 / 4 in. (6mm) from the dimples on the inlet pipe. Do not overheat the pipe.
    6.  
    7. While applying heat, use the extractor tool to grip the orifice tube. Use a turning motion, along with a push-pull motion, to loosen the impacted orifice tube and remove it.
    8.  

  2.  



Click image to see an enlarged view

Fig. Fig. 2: Special tools are required for removing the orifice

To install:
  1. Install the orifice tube with the shorter screen end in first.
  2.  
  3. Connect the line to the condenser outlet, then tighten.
  4.  
  5. Lower the vehicle.
  6.  
  7. Evacuate, charge and perform a leak test on the system.
  8.  

 
label.common.footer.alt.autozoneLogo