1995 Honda Prelude Owner's Manual - Page 144

Cooling System Do not add any rust inhibitors or other additives to your car's cooling system. They may not be compatible with the coolant or engine components. 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 recommended antifreeze. 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. 1. Slide the heater temperature control lever to maximum heat. 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 from the engine block. DRAIN PLUG DRAIN BOLT Maintenance