2018-F150-Owner's Manual

Maintenance

Coolant Change At specific mileage intervals, as listed in the scheduled maintenance information, the coolant should be changed. Add prediluted coolant approved to the correct specification. See Capacities and Specifications (page 412). Fail-Safe Cooling Fail-safe cooling allows you to temporarily drive your vehicle before any incremental component damage occurs. The fail-safe distance depends on ambient temperature, vehicle load and terrain. How Fail-Safe CoolingWorks If the engine reaches a preset over-temperature condition, the engine automatically switches to alternating cylinder operation. Each disabled cylinder acts as an air pump and cools the engine. When this occurs, your vehicle still operates, however: • Engine power is limited. • The air conditioning system turns off. Continued operation increases the engine temperature, causing the engine to completely shut down. Your steering and braking effort increases in this situation. When the engine temperature cools, you can re-start the engine. Have your vehicle checked as soon as possible to minimize engine damage. If the engine begins to overheat, the coolant temperature gauge moves toward the red zone: A warning lamp illuminates and a message may appear in the information display.

Do not add extra inhibitors or additives to the coolant. These can be harmful and compromise the corrosion protection of the coolant. Recycled Coolant We do not recommend the use of recycled coolant as an approved recycling process is not yet available. Dispose of used engine coolant in an appropriate manner. Follow your community's regulations and standards for recycling and disposing of automotive fluids. Severe Climates If you drive in extremely cold climates: • It may be necessary to increase the coolant concentration above 50%. • A coolant concentration of 60% provides improved freeze point protection. Coolant concentrations above 60% decrease the overheat protection characteristics of the coolant and may cause engine damage. If you drive in extremely hot climates: • You can decrease the coolant concentration to 40%. • Coolant concentrations below 40% decrease the freeze and corrosion protection characteristics of the coolant and may cause engine damage. Vehicles driven year-round in non-extreme climates should use prediluted coolant for optimum cooling system and engine protection.

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