Heater Core: Service and Repair

HEATER CORE HOUSING REPLACEMENT

1. Remove the evaporator/blower housing.
2. Remove the heater core.
3. Remove the defroster duct.
4. Disconnect the vacuum hoses from the heater core housing vacuum motors.
5. Remove the heater housing retaining nuts in the engine compartment. Remove the heater core housing.
6. Transfer the vacuum motors, etc. to the replacement housing.
To install the heater core housing, reverse the removal procedure.


HEATER CORE

Removal

1. Drain the radiator.
2. Disconnect the heater hoses at the heater core inlet and outlet tubes.
3. Remove the evaporator/blower housing. Service and Repair

Fig. 12:

4. Remove the retaining screws and remove the heater core by pulling it straight out of the housing (Fig. 12).


Installation

Fig. 12:

1. Install the heater core into the housing and install the screws.
2. Install the evaporator/blower housing.
3. Cement the seal into place in order to keep it from moving when the blower assembly is installed.
4. Connect the heater hoses to the heater core.
5. Fill the cooling system.