Without A/C
Heater CoreFig 19 Heater Case Assembly:
Caution:
- Vehicles are equipped with either an aluminum or a copper brass heater core. For all cases, replacement cores are copper brass. It is essential to positively identify the type of core being replaced because there is a difference in the heater core to heater case seals (Fig. 19). Having the correct seal is essential to the satisfactory performance of the heater system.
- 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 has a copper brass core, the seal removed with the old core can be used with the new copper brass replacement core, proving it is not damaged during removal.
- If the core has an aluminum heater core, a new seal for the copper brass replacement core will be required.
Removal
1. Remove instrument panel and lay it on front seat. Service and Repair
2. Remove heater case assembly. Service and Repair
3. Remove vacuum source line from heater core tube seal.
4. Remove seal from heater core tubes (Fig. 19).
Fig. 29 Heater core removal:
5. Remove four heater core access cover attaching screws and remove access cover from heater case (Fig. 20).
6. Lift heater core and seals from heater case.
Installation
1. Transfer three foam core seals to new heater core.
2. Install heater core and seals into heater case.
3. Position heater case access cover on heater case. Install four attaching screws (Fig. 20).
4. Install seal on heater core tubes (Fig. 19).
5. Install vacuum source line through heater core tube seal.
6. Install heater case assembly into vehicle.