2009 Honda Civic Owner's Manual - Page 309
2009 Honda Civic Manual
Page 309 highlights
Main Menu Table Of Contents Engine Coolant RADIATOR CAP RESERVE TANK RESERVE TANK Si Except Si Si 3. Remove the radiator cap by pushing down and turning counterclockwise. 4. The coolant level should be up to the base of the filler neck. Add coolant if it is low. Pour the coolant slowly and carefully so you do not spill any. Clean up any spill immediately; it could damage components in the engine compartment. 5. Put the radiator cap back on, and tighten it fully. 6. Pour coolant into the reserve tank. Fill it to halfway between the MAX and MIN marks. Put the cap back on the reserve tank. Do not add any rust inhibitors or other additives to your vehicle's cooling system. They may not be compatible with the coolant or engine components. 306 2009 Civic Sedan