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. Warranty Coverages
U.S. Owners Your new vehicle is covered by these warranties: New Vehicle Limited Warranty - covers your new vehicle, except for the emissions control systems and accessories, against defects in materials and workmanship. Emissions Control Systems Defects Warranty and Emissions Performance Wa ...