Honda Civic Service Manual: Engine Cooling

Engine

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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. To Set the Vehicle Speed
Take your foot off the pedal and press the -/SET button when you reach the desired speed. The moment you release the -/SET button, the set speed is fixed, and cruise control begins. The CRUISE CONTROL indicator comes on. During cruise control, Straight Driving Assist Function is activate ...