Heater Core: Service and Repair

REMOVAL PROCEDURE




1. Disconnect the battery negative cable.
2. Drain the cooling system.
3. Remove the heater hose quick disconnects from the heater core pipes:
^ Pull back on the sleeve in order to unlock.
^ Carefully pull back the tabs in order to remove the disconnects.
4. Remove the steering column.
5. Remove the I/P carrier (physical removal of the I/P carrier from the vehicle is not necessary, however, it is necessary to pull the unfastened I/P carrier back from the HVAC module to enable heater core removal from the module).




6. Remove the blower motor housing screws.
7. Remove the blower motor housing with the motor.




8. Remove the heater core pipe bracket screw.
9. Remove the heater core pipe bracket.




10. Remove the heater core inlet and outlet pipe retaining bracket screw.
11. Remove the heater core inlet and outlet pipes.




12. Remove the I/P support brace bolt from the I/P.
13. Remove the I/P support brace bolt from the transmission well.
14. Remove the I/P support brace.




15. Remove the heater core retaining screw.
16. Remove the heater core with the rubber seal:
^ Plug the ports in order to prevent coolant spills on the interior trim.
^ Remove the heater core.
^ Remove the rubber seal from the cavity.

INSTALLATION PROCEDURE
1. Install the rubber seal into the heater core cavity.
2. Being careful to avoid damage to the fins, install the heater core.
3. Install the heater core retaining screw. Tighten the retaining screw until fully seated and not stripped.
4. Position the I/P support brace at the I/P and at the transmission well.
5. Install the I/P support brace bolts at the I/P and at the transmission well. Tighten the bolts to 22 Nm (16 lb. ft).
6. Install the heater core inlet and outlet pipes:
^ Use new 0 rings.
^ Lightly lubricate the 0 rings with coolant.
7. Install the heater core inlet and outlet pipe retaining bracket screw. Tighten the screw to 5 Nm (44 lb. in).
8. Install the heater core pipe bracket.
9. Install the heater core pipe bracket screw until fully seated and not stripped.
10. Install the blower motor housing with the motor.
11. Install the blower motor housing screws. Tighten the screws to 4 Nm (35 lb. in).
12. Install the I/P carrier.
13. Install the steering column.
14. Install the heater hose quick disconnects to the heater core pipe connections:
^ Inspect that the disconnects are fully seated.
^ Push the retaining sleeve into the locked position.
15. Fill the cooling system.
16. Connect the battery negative cable.
17. Reprogram applicable accessories.