Heater Core: Service and Repair

Removing And Installing Heat Exchanger

Removing heat exchanger
1. Remove the covers over the heating/air-conditioning system, battery and fluid tank.
2. Disconnect the battery and cover terminal or battery.
3. Remove the entire wiper link with wiper motor. Refer to No. 921519, Removing and installing wiper motor.
4. Loosen right dome strut and bracket at the cowl frame and remove -(arrows)-.







5. Clamp shut both heater hoses in front of the heat exchanger with a commercially available hose clamp. Loosen heater hoses on the heat exchanger and pull off -(arrows)-.
6. Carefully remove cover over the heat exchanger.







7. Release heat exchanger -(arrows)- and pull it up and out.

Installing heat exchanger
1. Seal cover over the heat exchanger airtight with butyl adhesive.
2. Replace cover if damaged.
3. The heat exchanger is connected to the engine cooling system, and coolant flows through it when the engine is running. After removing or installing the heat exchanger, vent the cooling system. Refer to No. 193817, Draining and filling in coolant.