Remove the mounting nut from the heater unit. Take care not to damage or bend the fuel lines and the brake lines, etc. Remove the dashboard (see page 20-75). Remove the blower unit (see page 21-54). Disconnect the drain hose (A), then remove the mounting bolts and the heater unit (B).

Remove the self-tapping screws and the expansion valve cover (A). With air conditioning; carefully pull out the evaporator core (B) so you do not bend the inlet and outlet pipes. Remove the self-tapping screws and the flange cover (C), then remove the grommet (D) and carefully pull out the heater core (E) so you do not bend the inlet and outlet pipes. Install the heater core and the evaporator core (with A/C) in the reverse order of removal. Install the heater unit in the reverse order of removal and note these items: Do not interchange the inlet and outlet heater hoses and install the hose clamps securely. Refill the cooling system with engine coolant (see page 10-8). Be sure to connect the drain hose securely. Adjust the heater valve cable (see page 21-62). Make sure that there is no coolant leakage. Make sure that there is no air leakage. Enter the anti-theft code for the radio, then enter the customer's radio station presets. With air conditioning, refer to evaporator core replacement (see step 6 on page 21-85).