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. Checking the Engine
If the engine does not start, check the starter. Checking the Engine If you must start the vehicle immediately, use an assisting vehicle to jump start it.   Starter condition Checklist Starter doesn't turn or turns over slowly. The batte ...