Honda Civic Service Manual: Radiator

Thermostat Housing Removal and Installation (R18Z1)

1141B6 1. Radiator Cap 1. Wait until the engine is cool, then carefully remove the radiator cap. ...

Radiator Connecting Pipe Removal and Installation (K24Z7)

1141E7 1. Radiator Cap 1. Wait until the engine is cool, then carefully remove the radiator cap. ...

See also:

Honda Civic Owners Manual. Models with smart entry system
Make sure the parking brake is applied.  The electric parking brake indicator comes on for 15 seconds when you pull ►p the electric parking brake switch. Continuously variable transmission models Check that the shift lever is in P, then depress the brake peda ...