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. Refrigerant Recovery Procedure
3. Drain coolant from the radiator.
- Non-turbo model.
- Turbo model.
4. Remove the bolt and detach the hose and pipe from the expansion valve. Remove the bolts which hold the pipe from the engine compartment.

CAUTION: Seal the disconnected hose and pipe with a plug or vinyl tape to prevent foreign matter from entering.

5. Release the heater hose clamps in engine compartment to remove the hoses.






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






INSTALLATION

CAUTION: Replace the O-rings on hoses and pipes with new parts, and then apply compressor oil.

1. Install each part in the reverse order of removal.
2. Fill engine coolant.
- Non-turbo model.
- Turbo model.
3. Charge refrigerant. Refrigerant Charging Procedure

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