Ford F-650 2011 Supplement Manual page 106

Driving
• When starting a cold engine, increase the engine RPM slowly to make
sure adequate lubrication is available to the bearings.
Cold weather operation
WARNING: Do not use volatile starting aids such as ether,
propane or gasoline in the engine air intake system. Glow plugs
may ignite vapors which can cause engine damage or personal injury.
In order to operate the engine in temperatures of 32°F (0°C) or lower,
read the following instructions:
• Make sure that the batteries are of sufficient size and are fully
charged. Check other electrical components to make sure they're in
optimum condition.
• Use a permanent-type engine coolant solution to protect the engine
against damage from freezing.
• If your vehicle is equipped with a water-fuel separator, drain it daily.
Fill the fuel tank at the end of daily operation to prevent condensation
in the fuel system.
• Make sure you use proper cold weather engine oil and that it is at its
proper level.
• At temperatures of –4°F (–20°C) or below, it is recommended that you
use a crankcase-mounted coolant heater to improve cold engine
starting.
• If operating in arctic temperatures of –20°F (–29°C) or lower, consult
your truck dealer for information about special cold weather
equipment and precautions.
Note: Idling in cold weather will not heat the engine to its normal
operating temperature. Long periods of idling in cold weather can cause
a build-up of heavy deposits of carbon and rust on valve stems causing
them to stick which, in turn, can cause valvetrain damage.
Winter fronts
The use of winter fronts, or other air-restrictive devices mounted in front
of the radiator on vehicles with chassis-mounted charge air coolers, are
not recommended unless extremely cold weather conditions exist. Air
flow restriction can cause high exhaust temperatures, power loss,
excessive fan usage and a reduction in fuel economy. If you must use a
winter front, the device should have a permanent opening of at least 120
sq in. (774 sq. cm) directly in line with the fan hub.
106
2011 F-650/750 (f67)
Supplement, 2nd Printing
USA (fus)