Heater Core Replacement RHDD

Removal Procedure

Caution

Refer to Battery Disconnect Caution in Cautions and Notices.





1. Disconnect the negative battery cable.
2. Remove the air cleaner housing cover and the air induction hose at the intake manifold.
3. Drain the cooling system.
4. Remove the heater inlet hose from the engine outlet and blow the remainder of the coolant out of the heater core with a low pressure air hose to prevent spilling coolant on the vehicle interior when removing the core.
5. Install the heater inlet hose on the engine outlet and position the clamp at the 4 o'clock position as viewed from the left side of the vehicle.




6. Remove the right lower trim panel extension by pulling outward at the dual lock locations. Then rotate the panel outward to disengage the hinges from the console.




7. Remove ABS module from HVAC module by gently pulling outward to disengage hook and loop fastener, and then rearward to disengage alignment pins.
8. Disconnect ABS module electrical connector and remove module.
9. Remove the shift lock cable from the clamp at the front edge of the heater pipe cover.




10. Remove the pipe cover screws and remove the pipe cover.

Notice

Place absorbent towels under heater core pipe to heater core joints to prevent spilling any residual coolant on carpeting.





11. Remove the heater core pipe to core screws.




12. Remove the O-ring and the plastic seal from each joint and discard.




13. Rotate the upper pipe upward, and the lower pipe downward, and pull the heater core out of the HVAC module.

Installation Procedure

Notice

Install plastic seal with barbs toward heater core. Improper installation will damage seal and prevent joint sealing.






Important

Service heater core assemblies include the pipes attached to the core. Remove the pipes from the heater core and save the O-rings and the seals. Return the unused pipes with the used heater core.

Important

Do not install the heater core upside down. The core openings should be offset towards the top of the core.

1. Install the heater core into the HVAC module and press firmly to seat.





Important

To ease assembly of the pipe to the heater core, dip the O-ring in coolant to make tacky.

2. Install the upper pipe plastic seal, the O-ring, and the pipe to the heater core.

Important

Start all the screws before tightening.

3. Install the upper pipe to the heater core screws and tighten.




4. Install the lower pipe plastic seal, the O-ring, and the pipe to the heater core.

Important

Start all the screws before tightening.

5. Install the lower pipe to the heater core screws and tighten.




6. Connect ABS module electrical connector.
7. Install ABS module alignment pins into HVAC module flange and rotate ABS module toward HVAC module to engage hook and loop retainer.




8. Install the heater core pipe cover and screws.
9. Install the park lock cable into the clamp at the front edge of the heater pipe cover.
10. Install the right lower trim panel extensions by inserting the hinges into the console openings. Then rotate closed and push in at the dual lock location.




11. Fill and pressure test the cooling system.
12. Connect the negative battery cable.