How Fail-Safe Cooling Works; When Fail-Safe Mode Is Activated - Lincoln 1998 Navigator Owner's Manual

How fail-safe cooling works

If the engine overheats, the engine
will automatically switch from eight
to alternating four cylinder
operation. Each disabled cylinder
acts as an air pump and cools the
engine.
When this occurs, the engine
coolant temperature gauge will
move into the red area and the
light illuminates.
The check engine light will illuminate, indicating that vehicle service is
required.
The vehicle will still operate, but will have limited engine power and no
air conditioning capability.
Continued operation will increase engine temperature and cause the
engine to completely shut down. The vehicle will coast to a stop.
As the engine temperature cools, the engine may be re-started. Take
your vehicle to a service facility as soon as possible to minimize engine
damage.

When fail-safe mode is activated

Pull off the road as soon as possible.
Immediately turn the engine off to prevent severe engine damage.
Wait for the engine to cool.
Check the coolant level.
Maintenance and care
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