1997 Ford F150 Owner Guide 1st Printing - Page 166

Maintenance and care CHECKING AND ADDING ENGINE COOLANT Adding engine coolant Do not put engine coolant in the container for the windshield washer fluid. If sprayed on the windshield, engine coolant could make it difficult to see through the windshield. When the engine is cool, add a 50/50 mixture of engine coolant and water to the engine coolant recovery reservoir - DO NOT ADD DIRECTLY TO THE RADIATOR. Add straight water only in an emergency, but you should replace it with a 50/50 mixture of coolant and distilled water as soon as possible. COOLANT FILL LEVEL Check the coolant level in the coolant recovery reservoir the next few times you drive the vehicle. If necessary, add enough of a 50/50 mixture of coolant and water to bring the liquid level to the fill line on the reservoir. Never remove the coolant recovery cap while the engine is running or hot. 167