Without A/C

Removal

Fig 19 Heater Case Assembly:

1. Disconnect battery ground cable.
2. Drain coolant from radiator into a clean container.
3. Disconnect heater hoses from heater core. Plug heater core tubes or blow any coolant from heater core with low-pressure air.
4. Disconnect vacuum supply hose from in-line vacuum check valve in engine compartment.
5. Remove instrument panel as outlined.
6. Remove screw holding instrument panel shake brace to heater case. Remove instrument panel shake brace.
7. Remove floor register and rear floor ducts from the bottom of heater case (Fig. 19).
8. Remove three nuts attaching heater case to dash panel in engine compartment (Fig. 19).
9. Remove two screws attaching brackets to cowl top panel (Fig. 19).
10. Carefully pull heater assembly away from dash panel and remove heater from vehicle.

Installation
1. Position heater case assembly to dash panel and cowl top panel at air inlet opening. Install two screws to attach support brackets to cowl top panel.
2. Install three nuts in engine compartment to attach heater case to dash panel.
3. Install floor register and rear floor ducts on the bottom of the heater case.
4. Install instrument panel shake brace and screw to heater case.
5. Install instrument panel as outlined.
6. Connect heater hoses to heater core.
7. Connect black vacuum supply hose to vacuum check valve in engine compartment.
8. Fill radiator to correct level with previously removed coolant or specified mixture of coolant and water.
9. Connect battery ground cable.
10. Check system for proper operation.