
UNDER HOOD OVERVIEW - 3.5L DURATEC
Air filter assembly.
A
Engine oil dipstick. See Engine Oil Dipstick (page 282).
B
Brake fluid reservoir.
See Brake Fluid Check (page 290).
C
Engine coolant reservoir. See
Engine Coolant Check (page 285).
D
Engine compartment fuse box. See
Fuses (page 263).
E
Battery connection. See
Jump Starting the Vehicle (page 251).
F
Engine oil filler cap.
See Engine Oil Check (page 282).
G
Washer fluid reservoir.
See Washer Fluid Check (page 294).
H
280
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing MaintenanceABDC
EFGHE306489

UNDER HOOD OVERVIEW - 3.5L ECOBOOST™
Air filter assembly.
A
Engine oil dipstick. See Engine Oil Dipstick (page 282).
B
Brake fluid reservoir.
See Brake Fluid Check (page 290).
C
Engine coolant reservoir. See
Engine Coolant Check (page 285).
D
Engine compartment fuse box. See
Fuses (page 263).
E
Battery connection. See
Jump Starting the Vehicle (page 251).
F
Engine oil filler cap.
See Engine Oil Check (page 282).
G
Washer fluid reservoir.
See Washer Fluid Check (page 294).
H
281
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing MaintenanceA
H
BD
EG
C
FE306483

ENGINE OIL DIPSTICK - 3.5L
DURATEC
Minimum
A
Maximum
B
ENGINE OIL DIPSTICK - 3.5L
ECOBOOST™ Minimum
A
Maximum
B
ENGINE OIL CHECK
1. Make sure that your vehicle is on level ground. 2. Check the oil level before starting the
engine, or switch the engine off after
warm up and wait 10 minutes for the
oil to drain into the oil pan.
3. Remove the dipstick and wipe it with a clean, lint-free cloth.
4. Reinstall the dipstick and make sure it is fully seated.
5. Remove the dipstick again to check the
oil level.
Note: If the oil level is between the
maximum and minimum marks, the oil level
is acceptable. Do not add oil.
6. If the oil level is at the minimum mark, immediately add oil.
7. Reinstall the dipstick. Make sure it is fully seated.
Note: The oil consumption of new engines
reaches its normal level after approximately
3,000 mi (5,000 km).
Adding Engine Oil WARNING:
Do not add engine oil
when the engine is hot. Failure to follow
this instruction could result in personal
injury. WARNING: Do not remove the filler
cap when the engine is running.
Do not use supplemental engine oil
additives because they are unnecessary
and could lead to engine damage that the
vehicle warranty may not cover.
1. Clean the area surrounding the engine oil filler cap before you remove it.
2. Remove the engine oil filler cap.
3. Add engine oil that meets our specifications. See
Capacities and
Specifications (page 352).
282
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing MaintenanceE174604
AB E174604
AB

4. Reinstall the engine oil filler cap. Turn
it clockwise until you feel a strong
resistance.
Note: Do not add oil further than the
maximum mark. Oil levels above the
maximum mark may cause engine damage.
Note: Immediately soak up any oil spillage
with an absorbent cloth.
Engine Oil Pressure Warning Lamp WARNING: If it illuminates when
you are driving do not continue your
journey, even if the oil level is correct.
Have your vehicle checked. It illuminates when you switch
the ignition on.
If it illuminates when the engine
is running this indicates a malfunction.
Stop your vehicle as soon as it is safe to
do so and switch the engine off. Check the
engine oil level. If the oil level is sufficient,
this indicates a system malfunction. Have
your vehicle checked as soon as possible.
CHANGING THE ENGINE OIL
AND OIL FILTER WARNING:
Prolonged and
repeated skin contact with mineral oil
will result in the removal of natural fats
from the skin, leading to dryness,
irritation and dermatitis. In addition, used
engine oil contains potentially harmful
contaminants, which may cause skin
cancer. If skin contact occurs, wash the
area thoroughly with soap or skin
cleanser and water immediately. WARNING:
Do not dispose of
engine oils or oil filters in the household
refuse or the public sewage system. Use
an authorized waste disposal facility. WARNING:
Do not remove the oil
pan drain plug when the engine is
running. WARNING:
Do not remove the oil
filter when the engine is running.
1. Remove the oil pan drain plug and wait
for the oil to drain into a suitable
container.
2. Renew the oil filter.
3. Reinstall the oil pan drain plug.
4. Refill the engine with new oil that meets Ford specifications. See
Capacities and Specifications (page
352
).
Note: Do not add oil further than the
maximum mark. Oil levels above the
maximum mark may cause engine damage.
Note: Soak up any spillage with an
absorbent cloth immediately.
5. Reset the Intelligent Oil Life Monitor. See
Oil Change Indicator Reset
(page 284).
Engine Lubrication for Severe
Service Operation
The following conditions define severe
service operation. The Intelligent Oil Life
Monitor will determine engine oil and oil
filter change intervals.
• Frequent or extended idling.
• Frequent low-speed operation at
25 mph (40 km/h)
or less.
• Frequent severe dust condition
operation.
• Frequent off-road operation.
283
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Maintenance

•
Sustained ambient temperatures of
-9°F (-23°C) or below.
• Sustained ambient temperatures of
100°F (38°C)
or above.
• Sustained towing operation above
1,000 mi (1,600 km)
.
• Sustained high-speed driving at Gross
Vehicle Weight Rating (maximum
loaded weight for vehicle operation).
• Sustained use of diesel fuel other than
ultra-low sulfur diesel (ULSD).
OIL CHANGE INDICATOR
RESET
Only reset the system after changing the
engine oil and oil filter.
Resetting the Oil Life Monitoring
System
1. Switch the ignition on. Do not start the
engine.
2. Fully press the accelerator and brake pedals at the same time.
3. Keep the accelerator and brake pedals
fully pressed.
4. After 25 seconds, the oil change reminder resets.
5. Release the accelerator and brake pedals.
6. Switch the ignition off.
7. Switch the ignition on to confirm that the oil change reminder does not
display. CHANGING THE ENGINE AIR
FILTER 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.
Note: Failure to use the correct air filter
element may result in severe engine
damage. The vehicle Warranty may be void
for any damage to the engine if the correct
air filter element is not used.
Only use the specified air filter.
See
Capacities and Specifications (page
352).
Change the air filter element at the proper
interval.
See Scheduled Maintenance
(page 446). 1. Disconnect the intake air temperature
sensor electrical connector and cable
from the air filter cover.
284
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing MaintenanceE174607
12
3

Note:
If your vehicle has an engine cover
remove the cover before application of
Motorcraft Engine Shampoo and Degreaser.
Immediately rinse away any over spray.
• Never wash or rinse the engine while it
is hot or running; water in the running
engine may cause internal damage.
• Never wash or rinse any ignition coil,
spark plug wire or spark plug well, or
the area in and around these locations.
• Cover the battery, power distribution
box, and air filter assembly to prevent
water damage when cleaning the
engine.
CLEANING THE WINDOWS AND
WIPER BLADES
Car wash chemicals and environmental
fallout can result in windshield and wiper
blade contamination. Dirty windshield and
wipers will result in poor windshield wiper
operation. Keep the windshield and wiper
blades clean to maintain windshield wiper
performance.
To clean the windshield and wiper blades:
• Clean the windshield with a
non-abrasive glass cleaner. When
cleaning the interior of the windshield,
avoid getting any glass cleaner on the
instrument panel or door panels. Wipe
any glass cleaner off these surfaces
immediately.
• For windshields contaminated with
tree sap, chemicals, wax or bugs, clean
the entire windshield using steel wool
(no greater than 0000 grade) in a
circular motion and rinse with water.
• Clean the wiper blades with isopropyl
rubbing alcohol or windshield washer
concentrate. Note:
Do not use razor blades or other
sharp objects to clean or remove decals
from the inside of the heated rear window.
The vehicle warranty does not cover
damage caused to the heated rear window
grid lines.
CLEANING THE INTERIOR
Note: Do not allow air fresheners and hand
sanitizers to spill on interior surfaces. If a
spill occurs, wipe off immediately. Damage
may not be covered by the vehicle Warranty.
Note: Do not use household cleaning
products or glass cleaners, which can stain
and discolor the fabric and affect the flame
retardant abilities of the seat materials.
Note: We recommend distilled water when
cleaning.
Fabric, Carpets, Cloth Seats,
Headliners and Floor Mats
Note: Avoid soaking any surface. Do not
use excessive amounts of water to clean
the vehicle interior.
Note: To avoid spots or discoloration, clean
the entire surface.
To clean:
• Remove dust and loose dirt with a
vacuum cleaner or brush.
• Wipe the surface with a soft, damp
cloth and a mild soap and water
solution. Dry the area with a clean, soft
cloth.
• If a ring forms on the fabric after spot
cleaning, clean the entire area
immediately, but do not soak or the
ring will set.
305
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Vehicle Care

Seatbelts
WARNING: Do not use cleaning
solvents, bleach or dye on the vehicle's
seatbelts, as these actions may weaken
the belt webbing. WARNING:
On vehicles equipped
with seat-mounted airbags, do not use
chemical solvents or strong detergents.
Such products could contaminate the
side airbag system and affect
performance of the side airbag in a crash.
Note: Do not use abrasives, or chemical
solvents to clean them.
Note: Do not allow moisture to penetrate
the seatbelt retractor mechanism.
Cleaning may safely be carried out using
mild soap and water. Let them dry
naturally, away from artificial heat.
Leather Interior
(If Equipped)
Note: Follow the same procedure as
cleaning leather seats for cleaning leather
instrument panels and leather interior trim
surfaces.
For routine cleaning, wipe the surface with
a soft, damp cloth and a mild soap and
water solution. Dry the area with a clean,
soft cloth.
For cleaning and removing stains such as
dye transfer, use a leather cleaning product
for automotive interiors.
Do not use the following products as these
may damage the leather:
• Oil and petroleum or silicone-based
leather conditioners.
• Household cleaners. •
Alcohol solutions.
• Solvents or cleaners intended
specifically for rubber, vinyl and
plastics.
Suede Micro Fiber Fabric
(If Equipped)
Note: Do not steam clean.
Note: To avoid spots or discoloration, clean
the entire surface.
Do not use the following products:
• Leather care products.
• Household cleaners.
• Alcoholic solutions.
• Spot removers.
• Shoe polish.
To clean:
• Remove dust and loose dirt with a
vacuum cleaner.
• Wipe the surface with a soft, damp
cloth and a mild soap and water
solution. Dry the area with a clean, soft
cloth.
• If a ring forms on the fabric after spot
cleaning, clean the entire area
immediately, but do not soak or the
ring will set.
Instrument Cluster Screens, LCD
Screens and Radio Screens
Note: Do not use abrasives, alcoholic
solvents or chemical solvents to clean the
instrument cluster screens, LCD screens or
radio screens. These cleaning products can
damage the screens.
Clean the instrument panel and cluster
lens with a clean, damp and soft cloth,
then use a clean, dry and soft cloth to dry
these areas.
Do not spray any liquid directly onto the
screens.
306
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Vehicle Care

Do not use a microfiber cloth to clean the
bezel around the display screens as it could
damage the surface.
Rear Windows
Note:
Do not use any abrasive materials to
clean the interior of the rear windows.
Note: Do not install stickers or labels to the
interior of the rear windows.
Mirrors
Do not clean the housing or glass of any
mirror with harsh abrasives, fuel or other
petroleum or ammonia-based cleaning
products.
Storage Compartments, Cup
Holders and Ashtrays
To clean:
• Take out any removable inserts.
• Wipe the surface with a soft, damp
cloth and a mild soap and water
solution. Dry the area with a clean, soft
cloth.
CLEANING THE INSTRUMENT
PANEL AND INSTRUMENT
CLUSTER LENS WARNING: Do not use chemical
solvents or strong detergents when
cleaning the steering wheel or
instrument panel to avoid contamination
of the airbag system.
Note: Follow the same procedure as
cleaning leather seats for cleaning leather
instrument panels and leather interior trim
surfaces. Clean the instrument panel and cluster
lens with a clean, damp and soft cloth,
then use a clean, dry and soft cloth to dry
these areas.
•
Avoid cleaners or polishes that increase
the gloss of the upper portion of the
instrument panel. The dull finish in this
area helps protect you from
undesirable windshield reflection.
• Do not use any household cleaning
products or glass cleaners as these
may damage the finish of the
instrument panel, interior trim and
cluster lens.
• Wash or wipe your hands clean if you
have been in contact with certain
products such as insect repellent and
suntan lotion to avoid possible damage
to the interior painted surfaces.
• Do not allow air fresheners and hand
sanitizers to spill onto interior surfaces.
If a spill occurs, wipe off immediately.
Your warranty may not cover these
damages.
If a staining liquid like coffee or juice has
been spilled on the instrument panel or on
interior trim surfaces:
1. Wipe up spilled liquid using a clean, soft cloth as quickly as possible.
2. Use Motorcraft Premium Leather and Vinyl Cleaner or a commercially
available leather cleaning product for
automotive interiors. Test any cleaner
or stain remover on an inconspicuous
area.
3. Alternatively, wipe the surface with a clean, soft cloth and a mild soap and
water solution. Dry the area with a
clean, soft cloth.
4. If necessary, apply more soap and water solution or cleaning product to
a clean, soft cloth and press it onto the
soiled area. Allow this to set at room
temperature for 30 minutes.
307
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Vehicle Care