Heater Core Case: Service and Repair

Heater / Air Distributor Case Assembly Removal and Installation

Removal

1. Disconnect the negative battery cable.
2. Remove the instrument panel and tie-bar. Refer to Instrument Cluster Trim Panel Removal and Installation.
3. Drain the cooling system. Refer to Draining and Filling the Cooling System.
4. Compress the heater hose clamps at the firewall and slide the clamps toward the engine.




5. Remove the two heater hoses from the core pipes at the firewall.




6. Remove the screws that secure the heater/air distributor case assembly to the firewall on the side of the heater core pipes.




7. Remove the high-pressure and Low-pressure pipe from the A/C expansion valve.
8. Remove the evaporator drain hose.
9. Have an assistant support the heater/air distributor case from inside the vehicle.
10. Remove the screws that secure the heater/air distributor case assembly to the firewall on the side of the evaporator.
11. Disconnect the rear duct connector.




12. Remove the heater/air distributor case assembly from the vehicle.

Installation

1. Position the heater/air distributor case assembly in the vehicle.
2. Slowly raise the heater/air distributor case assembly into position against the firewall and hold it in position while the screws are installed and tightened from the engine side of the firewall.
3. Install the high-pressure and low-pressure pipe.




4. Install the heater/air distributor case assembly screws at the side of evaporator through the firewall from the engine compartment side.

Tighten: Tighten the heater/air distributor case assembly screws to 4 Nm (35 in. lbs.).

5. Install the heater/air distributor case assembly screws at the side of the heater core pipes through the firewall from the engine compartment side.

Tighten: Tighten the heater/air distributor case assembly screw to 4 Nm (35 in. lbs.).

6. Install the two heater hoses.
7. Slide the heater hose clamps into position.




8. Connect the rear duct connector.
9. Install the instrument panel and tie-bar. Refer to Instrument Cluster Trim Panel Removal and Installation.
10. Fill the cooling system. Refer to Draining and Filling the Cooling System.
11. Connect the negative battery cable.




12. Operate the controls to verify the proper function of the heating and ventilation systems.