Ford 2012 F-150 Raptor v.3 Manuel d'utilisateur télécharger pdf (Page 398)

100

101

If you drive in extremely hot climates:

• It is still necessary to maintain the coolant concentration

above 40%.

• NEVER decrease the coolant concentration below 40%.

• Decreased engine coolant concentrations below 40% will

decrease the corrosion/freeze protection characteristics of the

engine coolant and may cause engine damage.

• If available, refer to the chart on the coolant container to

ensure the coolant concentration in your vehicle will provide

adequate protection at the temperatures in which you drive.

Vehicles driven year-round in non-extreme climates should use a 50/50

mixture of engine coolant and distilled water for optimum cooling system

and engine protection.

What you should know about fail-safe cooling (if equipped)

If the engine coolant supply is depleted, this feature allows the vehicle to

be driven temporarily before incremental component damage is incurred.

The “fail-safe” distance depends on ambient temperatures, vehicle load

and terrain.

WARNING: If fail-safe cooling activates, pull off the road as

soon as safely possible and turn the engine off. The engine may

automatically shut off while driving without further indication.

How fail-safe cooling works

If the engine begins to overheat:

•

The engine coolant temperature gauge will move to the red (hot) area.

•

The mini message center (if equipped) will indicate “Check Gauges”,

refer to Warning lights and chimes in the Instrument Cluster chapter.

• The light will illuminate.

If the engine reaches a preset over-temperature condition, the engine

will automatically switch to alternating cylinder operation. Each disabled

cylinder acts as an air pump and cools the engine.

When this occurs the vehicle will still operate. However:

• The engine power will be limited.

• The air conditioning system will be disabled.

Maintenance and Specifications

398

2012 F-150 (f12)

Owners Guide, 3rd Printing

USA (fus)

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Ford 2012 F-150 Raptor v.3 Manuel d'utilisateur Page 398

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