GM Buick/Oldsmobile/Pontiac/Full-Size 1975-1990 Repair Guide

Orifice Tube

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REMOVAL & INSTALLATION



See Figure 1

  1. Disconnect the negative battery cable.
  2.  
  3. Discharge the system as described in Routine Maintenance .
  4.  
  5. Loosen the nut at the liquid line to the evaporator inlet pipe and remove the orifice tube carefully with Tool J-26549-C.
  6.  

To install:
  1. Install the new orifice tube with the shorter screen end in first.
  2.  
  3. Install the liquid line and torque to specification.
  4.  
  5. Reconnect the negative battery cable.
  6.  
  7. Evacuate and recharge the system using the procedures in Routine Maintenance .
  8.  



Click image to see an enlarged view

Fig. Fig. 1: Orifice tube location

 
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