Montana SV6 (2006), Relay, Terraza, Uplander (2005-2007)

Heater Core

Print

Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the engine cooling system.
  4.  
  5. Properly evacuate and recover the A/C system refrigerant.
  6.  
  7. Remove or disconnect the following:

    Left rear quarter trim panel
     
    Raise and support vehicle
     

  8.  
  9. Remove the level ride air compressor as follows:
    1. Remove the electronic level control ELC/TRAILER fuse.
    2.  
    3. Raise and safely support the vehicle.
    4.  
    5. Remove the A/C hoses for access.
    6.  
    7. Remove the air compressor
    8.  
    9. Squeeze the clips on the side of the air compressor filter in order to remove the filter from the underbody rail.
    10.  
    11. Remove the compressor bracket bolt.
    12.  
    13. Remove the compressor bracket nuts. Allow the compressor to hang from the bracket hook.
    14.  
    15. Remove the air line from the air dryer.
    16.  
    17. Disconnect the air compressor electrical connector.
    18.  
    19. Rotate the air compressor and the bracket 90 degrees in order to disengage the compressor bracket hook from the vehicle.
    20.  
    21. Remove the air compressor with the air compressor bracket.
    22.  
    23. Remove the air compressor dryer.
    24.  

  10.  
  11. Remove the auxiliary A/C line block fitting.
  12.  
  13. Remove the unit sealing washers and discard them.
  14.  
  15. Cap or tape the A/C lines to prevent contamination.

    Click image to see an enlarged view

    Fig. Location of the auxiliary heater hoses

  16.  
  17. Remove the auxiliary heater hoses from the heater core pipes.
  18.  
  19. Lower the vehicle.

    Click image to see an enlarged view

    Fig. Indicating the pillar duct and bolts

  20.  
  21. Remove or disconnect the following:

    A/C outlet pillar duct
     
    A/C outlet duct
     
    Blower motor electrical connector
     
    Blower motor resistor electrical connector
     
    Temperature actuator electrical connector
     
    HVAC module assembly bolts and nut
     
    Left power sliding door (PSD) module from the mounting bracket and reposition aside, if equipped
     
    HVAC module from vehicle

    Click image to see an enlarged view

    Fig. Showing the auxiliary HVAC module

     
    Heater pipe clamp screw
     
    Heater core mounting screws
     
    Heater core from HVAC module
     
    Pipe seal from the heater core
     
    Heater core mounting bracket
     

  22.  

To install:

  1. Install or connect the following:

    New seals onto the heater core
     
    Heater core mounting bracket
     
    New pipe seal onto the heater core
     
    Heater core into the HVAC module
     
    Heater core mounting screws; tighten screws to 14 inch lbs. (1.6 Nm)
     
    Heater pipe clamp screw; tighten screw to 14 inch lbs. (1.6 Nm)
     
    HVAC module body seals
     
    HVAC module assembly to the vehicle
     
    HVAC module assembly bolts and the nut, tighten bolts/nut to 89 inch lbs. (10 Nm)
     
    PSD module
     
    Temperature actuator electrical connector
     
    Blower motor resistor electrical connector
     
    Blower motor electrical connector
     
    A/C outlet duct; tighten bolts to 89 inch lbs. (10 Nm)
     
    A/C outlet pillar duct; tighten bolts to 89 inch lbs. (10 Nm)
     
    Raise and support vehicle
     
    Heater hoses to heater core pipes
     
    New sealing washers onto the A/C line
     
    A/C line block fitting bolt; tighten bolts to 15 ft. lbs. (20 Nm)
     

  2.  
  3. Install the level ride air compressor as follows:
    1. If removed, install the air compressor filter hose to the air compressor at 2 places.
    2.  
    3. Install the air compressor to the air compressor bracket. Tighten the bracket to 37 inch lbs. (50 Nm).
    4.  
    5. Install the air compressor bolts/screws. Tighten the air compressor bolts/screws to 35 inch lbs. (4 Nm).
    6.  
    7. Install the air compressor shield. Tighten the bolts to 27 inch lbs. (3 Nm).
    8.  
    9. Install the air compressor relay to the air compressor bracket.
    10.  
    11. Install the air compressor dryer.
    12.  
    13. Install the air compressor bracket to the underbody rail and rotate the air compressor bracket 90 degrees in order to allow the air compressor to hang from the air compressor bracket hook.
    14.  
    15. Connect the air compressor electrical connector.
    16.  
    17. Install the air line to the air dryer.
    18.  
    19. Install the air compressor bracket nuts. Tighten the air compressor bracket nuts to 89 inch lbs. (10 Nm).
    20.  
    21. Install the air compressor bracket bolt. Tighten the air compressor bracket bolt/screw to 37 ft. lbs. (50 Nm).
    22.  
    23. Install the air compressor filter to the underbody rail.
    24.  
    25. Install the A/C hoses if previously removed.
    26.  
    27. Lower the vehicle.
    28.  
    29. Install the ELC/TRAILER fuse.
    30.  

  4.  
  5. Install the left rear quarter trim panel.
  6.  
  7. Refill the cooling system.
  8.  
  9. Evacuate and recharge the A/C system.
  10.  
  11. Run the engine to normal operating temperatures, and then check the climate control operation. Check the system for leaks.

    Click image to see an enlarged view

    Fig. Removing components to access air compressor assembly



    Click image to see an enlarged view

    Fig. Identifying the air compressor assembly

  12.  

 
label.common.footer.alt.autozoneLogo