With Automatic Temperature Control A/C

Heater Core

Fig 22 Heater And Evaporator Exploded View:

Caution:
- Vehicles may be equipped with an aluminum or a copper brass heater core. Use replacement cores made of copper brass. Always identify the type of core being replaced because there is a difference in the heater core to heater case seals (Fig. 22). Having the correct seal will provide satisfactory heater system performance.
- Identification can be made by looking at one of the core tubes after a hose has been removed. An aluminum core will have an aluminum colored tube. A copper brass core will have a brass colored tube.
- If the core is copper brass, the seal removed with the old core can be used with the new copper brass replacement bore, providing it is not damaged during removal.
- If the core is aluminum, a new seal for the copper brass replacement core will be required.

Removal

1. Remove instrument panel. Service and Repair
2. Remove evaporator case assembly. Service and Repair

Fig 46 Suction Accumulator Drier:

Note: Whenever an evaporator case is removed, it will be necessary to replace the suction accumulator/drier.

Fig 26 Vacuum Line Removal From Heater Core Seal:

3. Remove vacuum source line from heater core tube seal.

Fig 25 Heater And A/C Evaporator Installation:

4. Remove seal from heater core tubes.

Fig 24 Electric Blend Door Actuator Attachment:

5. Remove three screws attaching blend door actuator to evaporator case.
Remove actuator.

Fig 27 Heater Core Access Cover Removal:

6. Remove four heater core access cover attaching screws and remove access cover and seal from evaporator case.
7. Lift heater core and seals from evaporator case.

Installation
1. Transfer the seal to new heater core.
2. Install heater core and secure into evaporator case.
3. Position heater core access cover on evaporator case and install four attaching screws (Fig. 36).
4. Position blend door actuator to blend door shaft.
Install three screws attaching blend door actuator to evaporator case(Fig 24).
5. Install seal on heater core tubes (Fig. 25).
6. Install vacuum source line through heater core tube seal (Fig. 35).
7. Install evaporator case assembly into vehicle.