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. Manual Transmission Fluid
Models with manual transmission Specified fluid: Honda Manual Transmission Fluid (MTF) Have a dealer check the fluid level and replace if necessary. Do not attempt to check or change the manual transmission fluid yourself. Manual Transmission Fluid If Honda MTF is not available, ...