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. Removing and Reinstalling the Front Head Restraints
Front head restraints can be removed for cleaning or repair. To remove a head restraint: Pull the restraint up as far as it will go. Then push the release button, and pull the restraint up and out. To reinstall a head restraint: Insert the legs back in place, then adjust the head restraint to ...