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What you should know about fail-safe cooling
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.
How fail-safe cooling works
• Standard cluster
• Optional cluster
If the engine begins to overheat:
• The engine coolant temperature gauge will move to the H (hot) area
(if your vehicle is equipped with analog gauges).
• The engine coolant temperature gauge will illuminate all eight bars
and a tone will sound every five seconds for one minute (if your
vehicle is equipped with digital gauges).
• The Check Engine indicator 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.
TEMP
H
C
N
O
R
M
H
C
REVIEW COPY
2005 Grand Marquis (grn), Owners Guide (post-2002-fmt) (own2002),
Market: USA_English (fus)
Maintenance and Specifications
220
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