1997 Ford F350 Owner Guide 1st Printing - Page 277

To find out how much engine coolant mixture your vehicle's coolant system can hold, see Refill capacities for fluids in the Index. 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. 2. 3. 278