2023 JEEP GLADIATOR fuel filter

360SERVICING AND MAINTENANCE
Replace fuel filters and drain water from the fuel filter
assembly. Under normal conditions the diesel fuel filter should be replaced every other oil change and
must not exceed 20,000 miles (32,000 km) if using diesel fuel up to B5. If the vehicle is being used in severe operating conditions, or in certain geographical areas of the country
(Pennsylvania, New York, Ohio, Maryland, West Virginia, Arkansas, Oklahoma, Kansas, Iowa,
Missouri and Nebraska) due to fuel cleanliness issues, it is recommended to replace the fuel filter every oil change and must not exceed 10,000 miles.
Replace engine air cleaner filter. XXXXX
Replace the cabin air filter. To be replaced every 12,000 miles (19,000 km).
Flush and replace the engine coolant at 10 years or
150,000 miles (240,000 km) whichever comes first. X
X
Replace accessory drive belt(s). X
Change transfer case fluid if using your vehicle for any of
the following: police, taxi, fleet, or frequent trailer towing. X
X
Mileage Or Time Passed (Whichever Comes First)
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Or Years: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
16,000
32,000
48,000
64,000
80,000
96,000
112,000
128,000
144,000
160,000
176,000
192,000
208,000
224,000
240,000

23_JT_OM_EN_USC_t.book Page 360

SERVICING AND MAINTENANCE361
ADDITIONAL MAINTENANCE — B6 TO B20 BIODIESEL
NOTE:
Under no circumstances should oil change intervals exceed 8,000 miles (12,875 km) or six months, whichever comes first when using biodiesel blends
greater than 5% (B5).
The owner is required to monitor mileage for B6-B20 biodiesel, the automatic oil change indicator system does not reflect the use of biofuels.
Fuel filter change interval is maintained at every second oil change. This is especially important with biodiesel usage.
For more information on using biodiesel Ú page 422.
WARNING!
You can be badly injured working on or around a motor vehicle. Do only service work for which you have the knowledge and the right equipment. If you have
any doubt about your ability to perform a service job, take your vehicle to a competent mechanic.
Failure to properly inspect and maintain your vehicle could result in a component malfunction and affect vehicle handling and performance. This could cause
an accident.
8

23_JT_OM_EN_USC_t.book Page 361

368SERVICING AND MAINTENANCE
2. Lift the engine air cleaner filter cover to access the engine air cleaner filter.
3. Remove the engine air cleaner filter from the housing assembly.

Engine Air Cleaner Filter

Engine Air Cleaner Filter Installation
NOTE:Inspect and clean the housing only if significant
dirt or debris is present before replacing the engine
air cleaner filter.
1. Install the engine air cleaner filter into the
housing assembly with the engine air cleaner
filter inspection surface facing downward.

2. Tighten engine air cleaner filter cover fasteners using a suitable tool.
DRAINING FUEL/WATER SEPARATOR
F
ILTER — DIESEL ENGINE
The fuel/water separator housing is located inside
the left frame rail in front of the fuel tank. The best
access to this water drain valve is from under the
vehicle. If necessary remove the fuel filter protective cover
to access the water drain valve.

Fuel/Water Separator Filter

If water is detected in the water separator while the
engine is running, or while the ignition switch is in
the ON position, the Water In Fuel Indicator Light
will illuminate and an audible chime will be heard.
At this point you should stop the engine and drain
the water from the filter housing.
1 — Engine Air Cleaner Filter Cover
2 — Engine Air Cleaner Filter
CAUTION!
Do not overtighten the engine air cleaner filter
cover lid screws or damage may result.
CAUTION!
Do not drain the fuel/water separator filter
when the engine is running.
Diesel fuel will damage blacktop paving
surfaces. Drain the filter into an appropriate
container.
1 — Retainers
2 — Fuel Filter Protective Cover

23_JT_OM_EN_USC_t.book Page 368

SERVICING AND MAINTENANCE369

Fuel/Water Separator Filter

Within 10 minutes of vehicle shutdown, turn the
filter drain valve (located on the bottom of the filter
housing) counterclockwise to drain fuel/water;
allow the accumulated water to drain. Leave the
drain valve open until all water and contaminants
have been removed. When clear fuel is visible,
close the drain valve by turning it clockwise.
Upon proper draining of the water from fuel filter
assembly, the Water In Fuel Indicator Light will
remain illuminated for approximately 10 seconds.
If the water was drained while the engine was
running, the Water In Fuel Indicator Light may
remain on for approximately three minutes.
NOTE:Care should be taken in disposing of used fluids
from your vehicle. Used fluids, indiscriminately
discarded, can present a problem to the envi -
ronment. Contact an authorized dealer, service
station, or government agency for advice on recy -
cling programs and for where used fluids and
filters can be properly disposed of in your area.
If more than two ounces or 60 ml of fuel have been
drained, follow the directions for Priming If The
Engine Has Run Out Of Fuel Ú page 370.
FUEL FILTER REPLACEMENT — DIESEL
E
NGINE
NOTE:Using a fuel filter that does not meet FCA US LLC
filtration and water separating requirements can
severely impact fuel system life and reliability.
1. Ensure engine is turned off.

2. Remove the fuel filter protective cover to
access the fuel filter assembly.

Fuel Filter Assembly

3. Place drain pan under the fuel filter assembly.
4. Open the water drain valve, and let any accumulated water and fuel drain.
1 — Water In Fuel Drain Valve
CAUTION!
Diesel fuel will damage blacktop paving
surfaces. Drain the filter into an appropriate
container.
Do not prefill the fuel filter when installing a
new fuel filter. There is a possibility debris
could be introduced into the fuel filter during
this action. It is best to install the filter dry and
allow the in-tank lift pump to prime the fuel
system.
1 — Retainers
2 — Fuel Filter Protective Cover
8

23_JT_OM_EN_USC_t.book Page 369

370SERVICING AND MAINTENANCE
5. Close the water drain valve.

Fuel Filter Assembly

6. Wipe clean the underside of the filter housing to prevent contamination from entering fuel
system during service.
7. Remove the fuel filter cap and filter from the housing using a socket. Rotate counter -
clockwise for removal.
Fuel Filter Assembly

8. Remove the used fuel filter cartridge from the cap and dispose of according to your local
regulations.
9. Wipe clean the sealing surfaces of the cap and housing. 10. Lubricate o-ring on the cap with clean engine
oil.
11. Install the new fuel filter cartridge onto the cap.
12. Insert the cap and filter into the housing with clockwise rotation, use a socket to tighten.
13. After engine start, verify the fuel filter cap does not leak.
PRIMING IF THE ENGINE HAS RUN OUT
O
F FUEL — DIESEL ENGINE

1. Add a substantial amount of fuel to the tank,
approximately 2 to 5 gal (8L to 19L).

2. Push ignition switch twice without your foot on brake to put vehicle in RUN position. This will
activate the in tank fuel pump for approxi -
mately 30 seconds. Repeat this process twice.
1 — Water Drain Valve
1 — Fuel Filter Cap
2 — Socket Adapter
CAUTION!
Take care when handling the new fuel filter to
prevent contamination from entering the fuel
system.
WARNING!
Do not open the high pressure fuel system with
the engine running. Engine operation causes
high fuel pressure. High pressure fuel spray can
cause serious injury or death.

23_JT_OM_EN_USC_t.book Page 370

SERVICING AND MAINTENANCE371
3. Start the engine using the Normal Starting procedure Ú page 148.
NOTE:The engine may run rough until the air is forced
from all the fuel lines.
NOTE:
Use of biodiesel mixture in excess of 20% can
negatively impact the fuel filter's ability to sepa -
rate water from the fuel, resulting in high pres -
sure fuel system corrosion or damage.
In addition, commercially available fuel addi -
tives are not necessary for the proper operation
of your diesel engine.
For extreme cold conditions, "Mopar® Premium
Diesel Fuel Treatment" is recommended to
assist with cold starting.
INTERVENTION REGENERATION
S
TRATEGY — MESSAGE PROCESS FLOW
This engine meets all required diesel engine
emissions standards. To achieve these emissions
standards, your vehicle is equipped with a
state-of-the-art engine and exhaust system. These
systems are seamlessly integrated into your
vehicle and managed by the Powertrain Control
Module (PCM). The PCM manages engine
combustion to allow the exhaust system’s catalyst
to trap and burn Particulate Matter (PM)
pollutants, with no input or interaction on your part. Additionally, your vehicle has the ability to alert you
to additional maintenance required on your vehicle
or engine Ú
page 121.
DIESEL EXHAUST FLUID
Diesel Exhaust Fluid (DEF) sometimes known
simply by the name of its active component, UREA,
is a key component of Selective Catalytic
Reduction (SCR) systems, which help diesel
vehicles meet stringent emission regulations. DEF
is a liquid reducing agent that reacts with engine
exhaust in the presence of a catalyst to convert
smog-forming Nitrogen Oxides (NOx) into harmless
nitrogen and water vapor.
For further information Ú page 424.
CAUTION!
The starter motor will engage for approximately
30 seconds at a time. Allow two minutes
between cranking intervals.
WARNING!
Do not use alcohol or gasoline as a fuel blending
agent. They can be unstable under certain
conditions and be hazardous or explosive when
mixed with diesel fuel.
CAUTION!
Due to lack of lubricants in alcohol or gasoline,
the use of these fuels can cause damage to the
fuel system.
WARNING!
A hot exhaust system can start a fire if you park
over materials that can burn, such as grass or
leaves, and those items that come into contact
with your exhaust system. Do not park or oper -
ate your vehicle in areas where your exhaust sys -
tem can contact anything that can burn.
8

23_JT_OM_EN_USC_t.book Page 371

TECHNICAL SPECIFICATIONS421
NOTE:Intentional tampering with the emissions control
system can result in civil penalties being assessed
against you.
FUEL REQUIREMENTS – DIESEL ENGINE
Federal law requires that you must fuel this vehicle
with Ultra Low Sulfur Highway Diesel fuel (15 ppm
Sulfur maximum) and prohibits the use of Low
Sulfur Highway Diesel fuel (500 ppm Sulfur
maximum) to avoid damage to the emissions
control system.
Use good quality diesel fuel from a reputable
supplier in your vehicle. For most year-round
service, Number 2 diesel fuel meeting ASTM
(formerly known as the American Society for
Testing and Materials) specification D-975 Grade
S15 will provide good performance. If the vehicle is exposed to extreme cold (below 20°F or -7°C), or
is required to operate at colder-than-normal
conditions for prolonged periods, use climatized
Number 2 diesel fuel or dilute the Number 2 diesel
fuel with 50% Number 1 diesel fuel. This will
provide better protection from fuel gelling or
wax-plugging of the fuel filters.
Diesel fuel is seldom completely free of water. To
prevent fuel system trouble, drain the
accumulated water from the fuel/water separator
using the fuel/water separator drain provided on
the fuel filter housing. If you buy good quality fuel
and follow the listed cold weather
recommendations, fuel conditioners should not be
required in your vehicle. If available in your area, a
high cetane “premium” diesel fuel may offer
improved cold-starting and warm-up performance.
DIESEL FUEL SPECIFICATIONS
This diesel engine has been developed to take
advantage of the high energy content and
generally lower cost Number 2 Ultra Low Sulfur
diesel fuel or Number 2 Ultra Low Sulfur climatized
diesel fuels.
NOTE:
If you accidentally fill the fuel tank with gasoline
or DEF on your diesel vehicle, do not start the
engine. Damage to the engine and fuel system
could occur. Please call an authorized dealer for
service.
A maximum blend of 5% biodiesel meeting
ASTM specification D-975 may be used with
your diesel engine without any adjustments to
regular service schedules.
Commercially available fuel additives are not
necessary for the proper operation of your
diesel engine.
Number 1 Ultra Low Sulfur diesel fuel should
only be used where extended arctic conditions
(-10°F or -23°C) exist.
The use of fuel additives, which are now being
sold as octane enhancers, is not recom
-
mended. Most of these products contain high
concentrations of methanol. Fuel system
damage or vehicle performance problems
resulting from the use of such fuels or addi -
tives is not the responsibility of The manufac -
turer and may void or not be covered under
the New Vehicle Limited Warranty.
CAUTION!
WARNING!
Do not use alcohol or gasoline as a fuel blending
agent. They can be unstable under certain
conditions and hazardous or explosive when
mixed with diesel fuel.
CAUTION!
If the Water in Fuel Indicator Light remains on,
DO NOT START engine before you drain the water
from the fuel filter(s) to avoid engine damage
Ú page 368.
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422TECHNICAL SPECIFICATIONS
BIODIESEL FUEL REQUIREMENTS
A maximum blend of 5% biodiesel meeting ASTM
specification D975 is recommended for use with
your diesel engine. If frequent operation with
biodiesel blends that are between 6% and 20%
(B6–B20) is desired, the maintenance schedule is
subject to shorter intervals.
The oil and filter change along with fuel filter
replacement is subject to shorter intervals when
operating your engine on biodiesel greater than
5%. Do not use biodiesel greater than 20%.
For regular use of biodiesel blends between 6%
and 20% (B6–B20) it is important that you
understand and comply with these requirements
Úpage 358.
Biodiesel is a fuel produced from renewable
resources typically derived from animal fat,
rapeseed oil (Rapeseed Methyl Ester (RME) base),
or soybean oil (Soy Methyl Ester (SME or SOME)
base). Biodiesel fuel has inherent limitations which
require that you understand and adhere to the
following requirements if you use blends of
biodiesel between 6% and 20% (B6–B20). There
are no unique restrictions for the use of B5.
Biodiesel Fuel Properties — Low Ambient
Temperatures
Biodiesel fuel may gel or solidify at low ambient
temperatures, which may pose problems for both
storage and operation. Precautions can be
necessary at low ambient temperatures, such as
storing the fuel in a heated building or a heated
storage tank, or using cold temperature additives.
Fuel Quality — Must Comply With ASTM
Standards
The quality of Biodiesel fuel may vary widely. Only
fuel produced by a BQ9000 supplier to the
following specifications may be blended to meet
biodiesel blend B6 – B20 fuel meeting ASTM
specification D-7467:
Petrodiesel fuel meeting ASTM specification
D-975 and biodiesel fuel (B100) meeting ASTM
specification D-6751
Fuel Oxidation Stability — Must Use Fuel
Within Six Months Of Manufacture
Biodiesel fuel has poor oxidation stability which
can result in long term storage problems. Fuel
produced to approved ASTM standards, if stored
properly, provides for protection against fuel
oxidation for up to six months.
CAUTION!
Failure to comply with Oil Change requirements
for vehicles operating on biodiesel blends
between 6% and 20% (B6–B20) will result in
premature engine wear. Such wear is not
covered by the New Vehicle Limited Warranty.
CAUTION!
Use of blends greater than 20% is not approved.
Use of blends greater than 20% can result in
engine damage. Such damage is not covered by
the New Vehicle Limited Warranty.
CAUTION!
In the event that the vehicle is filled with
biodiesel and not used for more than a month,
the fuel should either be used up by driving (up
to quarter tank) and filled with standard diesel
blends with less than 5% that is normally
available. This will help prevent the fuel filter
clogging and potential damage to the fuel
injection system due to degraded biodiesel,
which is not covered by the New Vehicle Limited
Warranty.

23_JT_OM_EN_USC_t.book Page 422