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• Refer to the chart on the coolant container to ensure the<br />

coolant concentration in your vehicle will provide adequate<br />

protection at the temperatures in which you drive.<br />

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

mixture of engine coolant and distilled water for optimum cooling system<br />

and engine protection.<br />

What you should know about fail-safe cooling<br />

(4.6L V8 engine only)<br />

If the engine coolant supply is depleted, this feature allows the vehicle to<br />

be driven temporarily before incremental component damage is incurred.<br />

The “fail-safe” distance depends on ambient temperatures, vehicle load<br />

and terrain.<br />

Fail-safe cooling and engine oil overheat mode (4.6L V8 only)<br />

If the engine coolant and/or engine oil overheat, the vehicle’s fail-safe<br />

modes will reduce engine power to limit engine damage, even with a<br />

total loss of coolant. The vehicle’s range and/or speed will be reduced,<br />

depending on vehicle load, terrain, and outside temperatures.<br />

The instrument cluster provides warnings for each mode.<br />

• Fail-Safe Cooling Mode: The (Service engine<br />

soon), (Engine oil pressure), and (Engine coolant<br />

temperature) indicators will be on.<br />

Along with these warning indicators, the engine coolant temperature<br />

gauge will read in the Hot (H) area.<br />

If the engine coolant reaches even hotter temperatures, fail-safe<br />

cooling mode limits engine power more and disables air conditioning.<br />

The engine will switch to alternating cylinder operation to h<strong>el</strong>p cool<br />

the engine. The engine will run rough in this mode.<br />

If continued operation increases the engine coolant temperature to a<br />

critical range, the engine will shut down. Steering and braking effort<br />

will increase. Once engine coolant temperature cools, the engine can<br />

be restarted.<br />

• Engine Oil Overheat Mode: The (Engine coolant temperature)<br />

indicator will be on. The instrument cluster has no se<strong>para</strong>te oil<br />

temperature indicator.<br />

Along with the (Engine coolant temperature) indicator, the engine<br />

coolant temperature gauge will read in the Hot (H) area.<br />

312<br />

Maintenance and Specifications<br />

2007 <strong>Explorer</strong> (exp)<br />

Owners Guide (post-2002-fmt)<br />

USA (fus)

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