Ford Super Duty (2018 year). Manual - part 90

CHANGING THE ENGINE AIR
FILTER - 6.2L/6.8L

WARNING

To reduce the risk of vehicle damage
and personal burn injuries, do not
start your engine with the air cleaner

removed and do not remove it while the
engine is running.

Use the correct specification air filter
element.  See Motorcraft Parts (page
423).

Note:  Failure to use the correct air filter
element may result in severe engine
damage.  Resulting component damage
may not be covered by the vehicle Warranty.

Change the air filter element at the correct
service interval.  See Scheduled
Maintenance (page 581).

E226426

x4

1

2

4

3

1.

Disconnect the mass air flow sensor
electrical connector. (6.8L only)

2. Remove the air intake tube securing

clamp.

3. Pull the air intake tube away from the

air filter housing.

4. Remove the clips that secure the air

filter housing cover.  Remove the air
filter housing cover.

E226427

5

5. Remove the air filter element from the

air filter housing.

6. Install in the reverse order.

CHANGING THE ENGINE AIR
FILTER - 6.7L DIESEL

WARNING

To reduce the risk of vehicle damage
and personal burn injuries, do not
start your engine with the air cleaner

removed and do not remove it while the
engine is running.

Use the correct specification air filter
element.  See Motorcraft Parts (page
423).

Note:  Failure to use the correct air filter
element may result in severe engine
damage.  Resulting component damage
may not be covered by the vehicle Warranty.

Change the air filter element at the correct
service interval.  See Scheduled
Maintenance (page 581).

1

2

4

3

E226429

x4

1.

Disconnect the mass air flow sensor
electrical connector.

2. Remove the air intake tube securing

clamp.

3. Pull the air intake tube away from the

air filter housing.

4. Remove the clips that secure the air

filter housing cover.  Remove the air
filter housing cover.

E226430

5

6

5. Remove the air filter element from the

air filter housing.

6. Remove the foam filter from the air

filter housing.

7.

Install in the reverse order.

Air Filter Restriction Gauge

E226428

The air filter restriction gauge is in the
upper housing of the air filter assembly.

Check the air filter restriction gauge
whenever you open the hood to carry out
general engine maintenance or at least
every 7,500 mi (12,000 km). If you operate
your vehicle in extremely dusty conditions,
check the gauge at least every 500 mi
(800 km) or two weeks, whichever occurs
first. Change the air filter element when
the restriction gauge reads near the
change filter line and the gauge is yellow.
Allowing the restriction gauge to reach
maximum affects engine performance and
fuel economy.

Operating your vehicle in heavy snowfall
or extreme rain conditions may allow
excessive amounts of snow or water into
the air intake system. This could restrict air
flow and cause the engine to lose power
or shut down.

After installing a new air filter element, you
must reset the gauge by pressing the reset
button.

After operating your vehicle during heavy
snowfall or extreme rain, do the following:
•

Snow: At the earliest opportunity, open
the hood and clear any snow and ice
from the air filter housing inlet and
reset the air filter restriction gauge.

•

Extreme rain: The air filter element
dries out after approximately 15–30
minutes of driving at highway speeds.
At the earliest opportunity, open the
hood and reset the air filter restriction
gauge.

Note: Do not remove the foam filter.

CHANGING THE ENGINE-
MOUNTED AND DIESEL FUEL
CONDITIONER MODULE FUEL
FILTERS - 6.7L DIESEL

WARNING

Do not dispose of fuel in the
household refuse or the public
sewage system. Use an authorized

waste disposal facility.

Your vehicle has two fuel filters. The first
filter mounts on top of the engine on the
left-hand side. The second filter is inside
the diesel fuel conditioner module. The
module is attached to the fuel tank in
different locations depending on the
configuration of your truck. See table
below for configurations.

Note: The module is at the front of the fuel
tank or at the front of the aft-axle fuel tank
on some models.

Regular fuel filter changes are an
important part of engine maintenance;
failing to keep with the scheduled
maintenance could lead to engine
performance issues and fuel injection
system damage.  See Scheduled
Maintenance (page 581).

Use only recommended service parts
conforming to specifications.  See
Motorcraft Parts (page 423).

Note: Using fuel that has high levels of
impurities may require more frequent filter
replacements than the service interval
specifies.

Diesel Fuel Conditioner Module
Filter

Filter Location

Use the tables below to find the location
of your filter.