Honda Civic Service Manual: Engine Cooling

Engine

...

Coolant Replacement (R18A9)

1. Radiator Cap 1. Wait until the engine is cool, then carefully remove the radiator cap. ...

See also:

Honda Civic Owners Manual. Models with Display Audio
How to customize While the vehicle is at a complete stop with the ignition switch in ON *1, select , and Settings, then select a setting item. *1: Models with the smart entry system have an ENGINE START/STOP button instead of an ignition switch. Customized Features ...