•
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 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
If the engine begins to overheat:
•
The engine coolant temperature
gauge will move to the red (hot)
area.
•
The
and the
symbol
will illuminate.
•
The
Service engine soon
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.
When this occurs the vehicle will still operate. However:
•
The engine power will be limited.
•
The air conditioning system will be disabled.
Continued operation will increase the engine temperature:
•
The engine will completely shut down.
•
Steering and braking effort will increase.
Once the engine temperature cools, the engine can be re-started. Take your
vehicle to a service facility as soon as possible to minimize engine damage.
When fail-safe mode is activated
You have limited engine power when in the fail-safe mode, so drive the
vehicle with caution. The vehicle will not be able to maintain high speed
operation and the engine will run rough. Remember that the engine is
capable of completely shutting down automatically to prevent engine
damage, therefore:
REVIEW COPY
2005 Navigator
(nav)
, Owners Guide (post-2002-fmt)
(own2002)
,
Market:
USA_English
(fus)
Maintenance and Specifications
368
Summary of Contents for Navigator2005
Page 440: ...440 ...
Page 840: ...400 ...
