Isuzu Ascender 2003-05

Heater Core

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Removal & Installation



  1. Disconnect the negative battery cable.
  2.  
  3. Drain the engine cooling system.
  4.  
  5. Recover the refrigerant.
  6.  
  7. Raise vehicle.
  8.  
  9. Remove heater lines.
  10.  
  11. Remove A/C lines.
  12.  
  13. Lower vehicle.
  14.  
  15. Remove the HVAC module-auxiliary assembly.
  16.  
  17. Remove the screws from heater core cover-auxiliary (3) from the HVAC module-auxiliary.
  18.  
  19. Remove the heater core cover-auxiliary (3).
  20.  
  21. Remove the HVAC module pass thru seal-auxiliary.
  22.  
  23. Remove the heater core-auxiliary (2) from the HVAC module-auxiliary.

    Click image to see an enlarged view

    Fig. Heater core and module

  24.  

To install:

  1. Install the heater core-auxiliary (2) to the HVAC module-auxiliary.
  2.  
  3. Install the HVAC module pass thru seal-auxiliary.
  4.  
  5. Install the heater core access cover-auxiliary (3) to the HVAC module-auxiliary.
  6.  
  7. Install the screws to the heater core access cover-auxiliary (3).
  8.  
  9. Tighten the screws to 18 inch. lbs. (2 Nm)
  10.  
  11. Install the HVAC module-auxiliary assembly.
  12.  
  13. Raise vehicle.
  14.  
  15. Install A/C lines.
  16.  
  17. Install heater lines.
  18.  
  19. Lower vehicle.
  20.  
  21. Add engine coolant.
  22.  
  23. Evacuate and recharge the A/C system.
  24.  
  25. Connect the negative battery cable.
  26.  

 
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