Heater Core Case: Service and Repair

Heater and Cooling Unit

REMOVAL

1. Disconnect the ground cable from battery.
2. Using the refrigerant recovery system, discharge refrigerant.
3. Drain coolant from the radiator.
4. Remove the bolts securing expansion valve and pipe in engine compartment. Release the heater hose clamps in engine compartment to remove the hoses.






5. Remove the instrument panel.
6. Remove the blower motor unit assembly.
7. Disconnect the harness connectors of the actuator, thermo sensor, power transistor and blower resistor.
8. Remove the bolt and nuts and remove the heater and cooling unit.






INSTALLATION

1. Install each part in the reverse order of removal.
2. Fill engine coolant.
3. Charge refrigerant.


Heater cooling unit
Tightening torque:
T1: 5.0 N.m(0.51 kgf.m, 3.7 ft.lb)
T2: 6.7 N.m(0.68 kgf.m, 4.9 ft.lb)
T3: 7.5 N.m(0.76 kgf.m, 5.5 ft.lb)

Blower motor unit
Tightening torque:
T: 7.5 N.m (0.76 kgf.m, 5.5 ft.lb)