Toyota Celica 1986-1993 Repair Guide

Expansion Valve

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REMOVAL & INSTALLATION




CAUTION
On models with an air bag, wait at least 90 seconds from the time that the ignition switch is turned to the lock position and the battery is disconnected before performing any further work.

  1. Disconnect the negative battery cable. Recover refrigerant (discharge system) from refrigeration system at a qualified facility.
  2.  



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Fig. Fig. 1 Cooling unit components1986-89 models shown



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Fig. Fig. 2 Removing expansion valve1986-89 models shown

  1. Remove the cooling unit (See Cooling Unit).
  2.  
  3. Place the cooling unit on a work bench and remove control amplifier, relay assemblies or power transistor assembly if so equipped.
  4.  
  5. Using suitable tools, remove the upper cooling unit case clamps and retaining screws. Remove thermistor with thermistor holder.
  6.  
  7. Remove the lower cooling unit case from the evaporator. Remove the evaporator from the cooling unit.
  8.  
  9. Remove the heat insulator (heat sensing tube) and the clamp from the outlet tube. Disconnect the liquid line from the inlet fitting of the expansion valve.
  10.  
  11. Disconnect the expansion valve from the inlet fitting of the evaporator. Remove the expansion valve.
  12.  


WARNING
Before installing the evaporator, check the evaporator fins for blockage. If the fins are clogged, clean them with compressed air. Never use water to clean the evaporator. Check the fittings for cracks and or scratches and replace as necessary.

To install:

  1. Connect the expansion valve to the inlet fitting of the evaporator and torque it to 17 ft. lbs. (23 Nm) on 1986-89 models. On 1990-93 models, connect the expansion valve, liquid and suction tube to evaporator torque the bolt to 48 inch lbs. (5.4 Nm). Be sure the O-ring is positioned on the tube fitting.
  2.  
  3. On 1986-89 models, connect the liquid line tube to the inlet fitting on the expansion valve. Torque the nut to 10 ft. lbs. (13 Nm).
  4.  
  5. Install the clamp and heat insulator (heat sensing tube) to the outlet tube.
  6.  
  7. Install the upper and lower cases on the evaporator. Install the thermistor. Install control amplifier, relay assemblies or power transistor assembly, if equipped.
  8.  
  9. Install the air conditioning wiring harness to the cooling unit and all other necessary components.
  10.  
  11. Install the cooling unit assembly in the vehicle. Be careful not to pinch the wiring harness while installing the cooling unit.
  12.  
  13. Connect the negative battery cable.
  14.  
  15. Evacuate, add oil to, charge and test the refrigeration system at an approved facility.
  16.  


WARNING
If the drain hose on the cooling unit assembly becomes clogged or blocked with debris, the cooling unit will leak water on the front floor rug area. Make sure it is clear.

 
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