water pump FORD F SERIES MOTORHOME AND COMMERCIAL CHASSIS 1999 10.G Owners Manual

Have your dealer check the engine cooling system for leaks if you have
to add more than 1.0 liter (1.0 quart) of engine coolant per month.
Severe winter climate
If you drive in extremely cold climates (less than –36°C [–34°F]), it may
be necessary to increase the coolant concentration above 50%. Refer to
the chart on the coolant container to ensure the coolant concentration in
your vehicle is such that the coolant will not freeze at the temperature
level in which you drive during winter months. Never increase the
coolant concentration above 60%. Increased engine coolant
concentrations above 60% will decrease the freeze protection
characteristics of the engine coolant. Vehicles driven year-round in
non-extreme climates should use a 50/50 mixture of engine coolant and
distilled water for optimum freeze 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
symbol will illuminate.
•the
symbol will illuminate.
•theService 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.
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Maintenance and care
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