2018-F150-Owner's Manual

Maintenance

5. Check the coolant level in the coolant reservoir the next few times you drive your vehicle. If necessary, add enough prediluted engine coolant to bring the coolant level to the correct level. If you have to add more than 1.1 qt (1 L) of engine coolant per month, have your vehicle checked as soon as possible. Operating an engine with a low level of coolant can result in engine overheating and possible engine damage. Note: During normal vehicle operation, the coolant may change color from orange to pink or light red. As long as the coolant is clear and uncontaminated, this color change does not indicate the coolant has degraded nor does it require the coolant to be drained, the system to be flushed, or the coolant to be replaced. In case of emergency, you can add a large amount of water without engine coolant in order to reach a vehicle service location. In this instance, qualified personnel: 1. Must drain the cooling system. 2. Chemically clean the coolant system. 3. Refill with engine coolant as soon as possible. Water alone, without engine coolant, can cause engine damage from corrosion, overheating or freezing. Do not use the following as a coolant substitute: • Alcohol. • Methanol. • Brine. • Any coolant mixed with alcohol or methanol antifreeze. Alcohol and other liquids can cause engine damage from overheating or freezing.

It is very important to use prediluted coolant approved to the correct specification in order to avoid plugging the small passageways in the engine cooling system. See Capacities and Specifications (page 412). Do not mix different colors or types of coolant in your vehicle. Mixing of engine coolants or using an incorrect coolant may harm the engine or cooling system components and may not be covered by the vehicle Warranty. Note: If prediluted coolant is not available, use the approved concentrated coolant diluting it to 50/50with distilledwater. See CapacitiesandSpecifications (page 412). Using water that has not been deionised may contribute to deposit formation, corrosion and plugging of the small cooling system passageways. Note: Coolantsmarketed for all makes and models may not be approved to Ford specifications and may cause damage to the cooling system. Resulting component damage may not be covered by the vehicle Warranty. If the coolant level is at or below the minimummark, add prediluted coolant immediately. To top up the coolant level do the following: 1. Unscrew the cap slowly. Any pressure escapes as you unscrew the cap. 2. Add prediluted coolant approved to the correct specification. See CapacitiesandSpecifications (page 412). 3. Add enough prediluted coolant to reach the correct level. 4. Replace the coolant reservoir cap, turn it clockwise until you feel a strong resistance.

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F-150(TFC)Canada/UnitedStatesofAmerica,enUSA,Editiondate:201709,SecondPrinting