Pontiac Fiero 1984-1988 Repair Guide

Air Conditioning Evaporator Core

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REMOVAL & INSTALLATION



  1. Disconnect the negative () battery cable.
  2.  
  3. Discharge the A/C system as outlined in the "A/C System Discharge" procedure in .
  4.  
  5. Remove the blower relay bracket.
  6.  
  7. Disconnect and mark all electrical connectors at the heater module.
  8.  
  9. Disconnect the evaporator core tube-to-accumulator fitting using a flare nut and backup wrench.
  10.  


WARNING
Damage to the aluminum fittings may result if the proper size flare nut wrenches are not used. Always use a backup wrench on the accumulator.

  1. Drain the engine coolant at the radiator.
  2.  


CAUTION
When draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.

  1. Disconnect the heater inlet and outlet hoses.
  2.  
  3. Remove the washer fluid reservoir.
  4.  
  5. Remove the bolts from the front blower housing.
  6.  
  7. Remove the blower housing assembly.
  8.  
  9. Remove the evaporator-to-condenser tube.
  10.  
  11. Remove the evaporator core from the housing.
  12.  

To install:

  1. Install the evaporator core into the housing.
  2.  
  3. Install new O-ring to all A/C connections. Lubricate the seals with 525 viscosity refrigerant oil.
  4.  
  5. Connect the evaporator-to-condenser tube and torque to 17 ft. lbs. (24 Nm) with a flare nut and backup wrench.
  6.  


WARNING
Damage to the aluminum fittings may result if the proper size flare nut wrenches are not used. Always use a backup wrench on the accumulator.

  1. Install the blower housing and connect the heater hoses at the heater core.
  2.  
  3. Install the housing bolts and tighten.
  4.  
  5. Connect the evaporator core tube-to-accumulator and torque to 30 ft. lbs. (41 Nm) with a flare nut and backup wrench.
  6.  
  7. Install the relay bracket and all electrical connectors.
  8.  
  9. Evacuate and recharge the A/C system as outlined in the "A/C Evacuation and Recharge" procedure in .
  10.  
  11. Install the washer fluid reservoir and reconnect the negative (-) battery cable.
  12.  
  13. Start the engine and check for proper operation of the control assembly, fan blower switch, compressor, clutch cycling, proper cooling and coolant leaks.
  14.  

 
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