Heater Core: Service and Repair

Heater Core Replacement

Removal Procedure

1. Remove the air cleaner and duct assembly (3.1L only).
2. Remove the fuel injector sight shield (3.8L only). Refer to Engine Cover Replacement Service and Repair.
3. Drain the coolant.
4. Disconnect both of the heater hoses at the heater core.
5. Remove the lower the floor console if equipped.
6. Remove the RH and LH instrument panel insulators.






7. Remove the heater core outlet cover screws.
8. Remove the heater core outlet cover.






9. Remove the heater core cover screws.
10. Remove the heater core cover.






11. Remove and discard the seals (1,2,3) from the heater core cover.






12. Remove and discard the heater core outer seal (5) from the heater core.






13. Remove the heater core clamp screw (1).
14. Remove the heater core retaining clamp.
15. Remove the heater core pipe retainer clamp screw (2).






16. Remove the heater core from the HVAC lower case.






17. Remove and discard the heater core lower seal (4) from the HVAC case.






18. Remove and discard the heater core center seal (3) from the HVAC case.






19. Remove and discard the heater core upper seal (2) from the HVAC lower case.






20. Remove and discard the heater core side seals (1) from the HVAC lower case.

Installation Procedure







1. Install the heater core side seals (1) from the HVAC lower case.






2. Install the heater core upper seal (2) from the HVAC lower case.






3. Install the heater core center seal (3) from the HVAC case.






4. Install the heater core lower seal (4) from the HVAC case.






5. Install the heater core from the HVAC lower case.







Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

6. Install the heater core line clamp screw (2).

Tighten
Tighten the heater core line clamp screw to 1.5 Nm (13 lb in).

7. Install the heater core mounting clip with a screw (1).

Tighten
Tighten the heater core mounting clip screw to 1.5 Nm (13 lb in)






8. Install heater core outer seal (5) to the heater core.






9. Install new seals (1,2,3) to the heater core cover.






10. Install the heater core cover.
11. Install the heater core cover screws.

Tighten
Tighten the heater core cover screws to 1.5 Nm (13 lb in).






12. Install the heater core outlet cover.
13. Install the heater core outlet cover screws.

Tighten
Tighten the heater core outlet cover screws to 1.5 Nm (13 lb in).

14. Install the lower the floor console if equipped.
15. Install the RH and LH instrument panel insulators.
16. Connect both of the heater hoses at the heater core.
17. Refill the coolant.
18. Install the air cleaner and duct assembly (3.1L only).
19. Install the fuel injector sight shield (3.8L only). Refer to Engine Cover Replacement Service and Repair.