Heater Core: Service and Repair

Removal





1. Remove battery ground cable.
2. Remove coolant recovery tank.
3. Remove heater core hoses.
- Place a clean pan under the vehicle to catch any coolant spillage.
- Plug the hoses.
- Allow coolant in the core to drain into the pan.





4. Remove heater distributor duct.
- Remove the screws that hold the distributor duct to the distributor case and the distributor duct to the engine cover.
5. Remove engine housing cover.
- Remove the screws at the windshield, all lower screws and the right instrument panel support bracket at the door pillar and the engine housing.
6. Remove instrument panel.
7. Lower the steering column.
- Raise and support the right side of the instrument panel.
8. Remove defroster duct to distributor case attaching screws.
9. Remove distributor to heater case (2) screws.





10. Remove temperature door cable.
- Fold the cable back for access.
11. Remove heater case and core.
- Three nuts at the engine compartment side of the distributor case and one screw on the passenger side.
- Tilt the case assembly rearward at the top while lifting up until the core tubes clear the dash openings.
12. Remove core retaining strap screws.
13. Remove heater core.


Installation





1. Install core to the heater case.
2. Install sealer between the core and case.
3. Install core retaining strap screws.
4. Apply new sealer between the heater case and the opening in the vehicle.
5. Install heater core and case to the vehicle.
- Tilt the case until the core tubes clear the cowl opening.





6. Install temperature door cable.
7. Install distributor duct to the heater case.
8. Install defroster duct to the distributor case.
9. Install instrument panel.
10. Install steering column.
11. Install engine housing cover.
12. Install heater distributor duct.
13. Install heater core hoses.
14. Install coolant recovery tank.
15. Install battery ground cable.