Engine And Secondary Cooling System Coolant; Checking Engine Coolant - Ford Diesel 2011 Supplement Manual

Maintenance and Specifications
• use of fuels with sulfur content other than ultra-low sulfur diesel
(ULSD)
• use of high-sulfur diesel fuel

ENGINE AND SECONDARY COOLING SYSTEM COOLANT

Checking engine coolant

The concentration (freeze point protection), additive strength (corrosion
inhibitor), and level of coolant should be checked at the mileage intervals
listed in the scheduled maintenance information. The coolant
concentration should be maintained at 50/50 coolant and water, which
equates to a freeze point of -36°C (-34°F). Coolant concentration testing
is possible with a hydrometer or antifreeze tester (such as the Rotunda
Battery and Antifreeze Tester, 0014–R1060). The level of coolant should
be maintained within the COLD FILL RANGE in the coolant reservoirs. If
the level falls below, add coolant per the instructions in the Adding
coolant section.
Your vehicle was factory-filled with a 50/50 coolant and water
concentration. If the concentration of coolant falls below 40% or above
60%, the engine parts could become damaged or not work properly. A
50/50 mixture of coolant and water provides the following:
• freeze protection down to -36°C (-34°F).
• boiling protection up to 129°C (265°F).
• protection against rust and other forms of corrosion.
• an accurate temperature readout from the engine coolant
gauge.
When the engine is cold, check the level of coolant in the reservoirs. See
Identifying components in the engine compartment for the location of
the engine and secondary cooling system reservoirs.
• The coolant should be within the COLD FILL RANGE in the coolant
reservoirs.
• Refer to the scheduled maintenance information for service interval
schedules.
• Be sure to read and understand Precautions when servicing your
vehicle in your Owner's Guide.
If the coolant has not been checked at the recommended interval, the
engine or secondary coolant reservoir may become low or empty. If
either reservoir is low or empty, add coolant to the reservoir(s). Refer to
Engine and secondary cooling system refill procedure in this chapter.
46
2011 Diesel (eco)
Supplement, 5th Printing
USA (fus)