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Maintenance and specifications – FORD 2002 F-550 v.2 User Manual

Page 249

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Refer to the chart on the coolant container to ensure the

coolant concentration in your vehicle will provide adequate
freeze protection at the temperatures in which you drive in the
winter months.

If you drive in extremely hot climates:
It is still necessary to maintain the coolant concentration

above 40%.

NEVER decrease the coolant concentration below 40%.
Decreased engine coolant concentrations below 40% will

decrease the corrosion protection characteristics of the engine
coolant and may cause engine damage.

Decreased engine coolant concentrations below 40% will

decrease the freeze protection characteristics of the engine
coolant and may cause engine damage.

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 equipped)

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

symbol will

illuminate.

• The Service Engine Soon

indicator light will illuminate.

H

C

Maintenance and Specifications

249

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