Heater Core: Service and Repair

Fig. 36 Instrument panel removal. 1985-87 CRX:

1. Disconnect battery ground cable, then drain cooling system.
2. Disconnect heater hoses at heater core and install plugs in core tubes.
3. Disconnect control cable from heater valve, then remove heater housing lower mounting nut.
4. Remove steering wheel and lower steering column cover.
5. Remove instrument panel lower cover.
6. Remove control knobs, then remove heater control attaching screws.
7. Remove instrument cluster as described under ``Instrument Cluster, Replace.''
8. Remove side air vents, center bolt cover and ash tray, Fig. 36.
9. Disconnect antenna lead from radio and instrument panel ground wire from steering column.
10. Disconnect instrument panel wiring harness connectors at fuse panel.
11. Remove instrument panel attaching bolts, then lift up and pull instrument panel from guide pin and remove instrument panel. Support instrument panel when removing from guide pin.
12. Separate heater housing and remove heater core.
13. Reverse procedure to install. When installing instrument panel, ensure panel is properly positioned on guide and that wiring harness are properly routed. Tighten instrument panel attaching bolts alternately and evenly, ensuring instrument panel remains properly aligned. After refilling cooling system, loosen engine cooling system bleed bolt located in upper radiator hose outlet. Start engine. Tighten bleed bolt when cooling system trapped air has escaped and coolant begins to flow.