Heater Core: Service and Repair

Fig. 8 Exploded View Of Heater Unit:

Fig. 9 Exploded View Of Heater Unit:

1. Disconnect battery ground cable.
2. Drain engine coolant.
3. Remove heater unit as follows:
a. Refer to Fig. 6 when removing heater unit from MX-3 models.
b. Refer to Fig. 7 when removing heater unit from Protege and 323 models.

4. On MX-3 models, refer to Fig. 8 when replacing heater core assembly.
5. On Protege and 323 models, refer to Fig. 9 when replacing heater core assembly.
6. Reverse procedure to install.