For 1990-2009 cars

### Removal Procedure

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Disconnect the coolant heater power supply cord from the coolant heater.

Important: A residual amount of coolant will drain from the engine block.

3. Remove the coolant heater and seal from the engine block.

### Installation Procedure

1. Install the seal to the coolant heater.

Notice: Refer to Fastener Notice in the Preface section.

2. Install the coolant heater into the engine block.

Tighten
Tighten the coolant heater to 60 N·m (44 lb ft).

3. Connect the coolant heater power supply cord to the coolant heater.
4. Fill the cooling system. Refer to Cooling System Draining and Filling .