1. Drain the coolant from the cooling system.
2. Remove the control panel, separate the cable fixing piece on the left side of the heater, and remove the screw on the terminal.
3. Unplug the wire connector behind the blower motor.
4. Disconnect the vacuum tube and lighting line behind the heater control device.
5. Put a container under the engine and the heater water supply pipe behind the cylinder head.
6. Remove the heater water supply pipe behind the cylinder head.