2003 Honda Civic Owner's Manual - Page 210

Cooling System Replacing Engine Coolant The cooling system should be completely drained and refilled with new coolant according to the time and distance recommendations in the maintenance schedule. Only use Honda All Season Antifreeze/ Coolant Type 2. Draining the coolant requires access to the underside of the car. Unless you have the tools and knowledge, you should have this maintenance done by a skilled mechanic. DRAIN PLUG DRAIN BOLT 1. Turn the ignition ON (II). Turn the temperature control dial to maximum heat. Turn off the ignition. Open the hood. Make sure the engine and radiator are cool to the touch. 2. Remove the radiator cap. 3. Loosen the drain plug on the bottom of the radiator. The coolant will drain through the splash guard. Remove the drain bolt and washer from the engine block. Drain the coolant into an appropriate container. CONTINUED Maintenance 209