Cold Weather Precautions - 6.7L Diesel; Cold Weather Precautions - 6.8L/7.3L - Ford SUPER DUTY 2023 Owner's Manual

After extended operation in mud, sand,
water, or similar dirty conditions, inspect
the underbody and clean your vehicle as
soon as possible.
If you experience unusual vibration after
driving in mud, slush or similar conditions,
check the wheels for impacted material.
Impacted material can cause vibrations
while driving and wheel imbalance.
Remove the material to resolve the
problem.
COLD WEATHER
PRECAUTIONS - 6.7L DIESEL
Winter Grill Cover
The winter grill cover enhances heater
performance and will reduce the amount
of time it takes to warm the inside of your
vehicle in extremely cold conditions below
-0.4°F (-18°C).
The winter grill cover installs over the
outside of the front grill and restricts the
air flowing to the engine compartment by
covering the radiator grill openings.
E391665
Note: The grill cover must be installed in
extremely cold conditions below 10.4°F
(-12°C) to prevent possible engine damage.
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOM
Driving Hints
(If Equipped)
Usage Guidelines
The winter grill cover should only be used
while operating your vehicle in extremely
cold temperatures or in heavy snow for
extended periods of time. In these
temperatures, the vehicle does not need
a large amount of air to properly cool the
engine. During periods of operation when
more airflow is required to cool the vehicle,
the winter grill cover should not be used.
The following usage guidelines will allow
adequate airflow for proper radiator and
air cooler performance:
• Do not use the cover when
temperatures are above 50.0°F (10°C).
Use of the cover in these conditions
could cause your vehicle to overheat.
Remove the cover if the vehicle
overheats.
• Do not use the cover above 32.0°F
(0°C) if towing a trailer. Your vehicle
may overheat if the cover is used while
towing a trailer.
• Do not modify the cover.
Installation Instructions
Installation and removal instructions are
included in the winter grill cover package.
Refer to the usage guidelines to
understand when to use the cover.
The cover will seem undersized during the
first installation, which is normal. The cover
stretches during installation to ensure a
tight fit. The first installation is best
performed when the grill cover is warm.
COLD WEATHER
PRECAUTIONS - 6.8L/7.3L
The functional operation of some
components and systems can be affected
at temperatures below approximately
-13°F (-25°C).
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