1996 Ford Bronco Owner's Manual - Page 296

You may add water by itself only in an emergency, but you should replace it with a 50/50 or appropriate mixture as soon as possible. Have your dealer check the engine cooling system for leaks if you have to add a quart (liter) of engine coolant more than once a month. Checking hoses Inspect all engine and heater system hoses for deterioration, leaks and loose clamps before adding or replacing engine coolant. Make whatever repairs or replacements that are necessary using Motorcraft parts or their equivalents. Engine coolant drain and flush To drain your vehicle's engine coolant: 1. Turn off the engine and let it cool. Fully depressurize the engine cooling system by covering the radiator cap with a thick cloth and turning it slowly counterclockwise to the first stop. Step back while the pressure releases. Remove the cap. Attach a small hose to the drain tube at the bottom of the radiator. Let the engine coolant drain into a suitable container. Disconnect the lower radiator hose at the radiator connector and drain any remaining engine coolant into a container. Reconnect the lower radiator hose and close the radiator drain cock. 2. 3. 4. 5. Proper procedures for flushing the cooling system can be found in the Truck Service Manual. 299