Jeep Gladiator (2022 year). Manual in english

SERVICING AND MAINTENANCE

395

(Continued)

HECKING

EVEL

To ensure proper engine lubrication, the engine oil

must be maintained at the correct level. Check the

oil level at regular intervals, such as every fuel

stop. The best time to check the engine oil level is

about five minutes after a fully warmed up engine

is shut off.
Checking the oil while the vehicle is on level ground

will improve the accuracy of the oil level readings.
There are four possible dipstick types:



Crosshatched zone.



Crosshatched zone marked SAFE.



Crosshatched zone marked with MIN at the low

end of the range and MAX at the high end of the

range.



Crosshatched zone marked with dimples at the

MIN and the MAX ends of the range.

NOTE:

Always maintain the oil level within the crosshatch

markings on the dipstick.
Adding 1 quart (1 liter) of oil when the reading is at

the low end of the dipstick range will raise the oil

level to the high end of the range marking.

DDING

ASHER

LUID

The fluid reservoir is located in the engine

compartment. Be sure to check the fluid level at

regular intervals. Fill the reservoir with windshield

washer solvent only (not radiator antifreeze). When

refilling the washer fluid reservoir, take some

washer fluid and apply it to a cloth or towel and

wipe clean the wiper blades; this will help blade

performance.
To prevent freeze-up of your windshield washer

system in cold weather, select a solution or mixture

that meets or exceeds the temperature range of

your climate. This rating information can be found

on most washer fluid containers.

AINTENANCE

-F

REE

ATTERY

Your vehicle is equipped with a maintenance-free

battery. You will never have to add water, and

periodic maintenance is not required.

CAUTION!

Overfilling or underfilling the crankcase will

cause aeration or loss of oil pressure. This could

damage your engine.

WARNING!

Commercial windshield washer solvents are

flammable. They could ignite and burn you. Care

must be exercised when filling or working around

the washer solution.

WARNING!



Battery fluid is a corrosive acid solution and

can burn or even blind you. Do not allow

battery fluid to contact your eyes, skin, or

clothing. Do not lean over a battery when

attaching clamps. If acid splashes in eyes or

on skin, flush the area immediately with large

amounts of water

page 373.



Battery gas is flammable and explosive. Keep

flame or sparks away from the battery. Do not

use a booster battery or any other booster

source with an output greater than 12 Volts.

Do not allow cable clamps to touch each

other.



Battery posts, terminals, and related accesso

ries contain lead and lead compounds. Wash

hands after handling.



Vehicles with the Stop/Start system will be

equipped with two batteries. Both the main

and the supplemental batteries must be

disconnected to completely de-energize the

12 Volt electrical system.

396

SERVICING AND MAINTENANCE

(Continued)

RESSURE

ASHING

Cleaning the engine compartment with a high

pressure washer is not recommended.

VEHICLE MAINTENANCE

An authorized dealer has the qualified service

personnel, special tools, and equipment to

perform all service operations in an expert

manner. Service Manuals are available which

include detailed service information for your

vehicle. Refer to these Service Manuals before

attempting any procedure yourself.

NOTE:

Intentional tampering with emissions control

systems may void your warranty and could result in

civil penalties being assessed against you.

NGINE

Engine Oil Selection

For the proper engine oil selection

page 458.

American Petroleum Institute (API)

Approved Engine Oil

These symbols mean that the oil has been certified

by the API. The manufacturer only recommends API

trademark oils.

The API Starburst trademark certifies

0W-20, 0W-30 and 5W-30 engine oils.

The API Donut trademark certifies 0W-40

and 5W-40 engine oil.



Serious injury or death could result if you do

not disconnect both batteries. To learn how to

properly disconnect, see an authorized dealer.

CAUTION!



It is essential when replacing the cables on

the battery that the positive cable is attached

to the positive post and the negative cable is

attached to the negative post. Battery posts

are marked positive (+) and negative (-) and

are identified on the battery case. Cable

clamps should be tight on the terminal posts

and free of corrosion.



If a “fast charger” is used while the battery is

in the vehicle, disconnect both vehicle battery

cables before connecting the charger to the

battery. Do not use a “fast charger” to provide

starting voltage.



Vehicles with the Stop/Start system will be

equipped with two batteries. Both the main

and the supplemental batteries must be

disconnected to completely de-energize the

12 Volt electrical system.

WARNING!



If the negative battery cables are not isolated

properly it can cause a potential power spike

or surge in the system, resulting in damage to

essential electrical components.

CAUTION!

Precautions have been taken to safeguard all

parts and connections however, the pressures

generated by these machines is such that

complete protection against water ingress

cannot be guaranteed.

CAUTION!

WARNING!

You can be badly injured working on or around a

motor vehicle. Only do service work for which

you have the knowledge and the proper

equipment. If you have any doubt about your

ability to perform a service job, take your vehicle

to a competent mechanic.

SERVICING AND MAINTENANCE

397

Synthetic Engine Oils

Your engine was designed for synthetic engine oils,

only use synthetic API approved engine oils.
Synthetic engine oils which do not have both the

correct API trademark and the correct SAE viscosity

grade numbers should not be used.

Materials Added To Engine Oil

The manufacturer strongly recommends against

the addition of any additives (other than leak

detection dyes) to the engine oil. Engine oil is an

engineered product and its performance may be

impaired by supplemental additives.

Disposing Of Used Engine Oil And Oil

Filters

Care should be taken in disposing of used engine

oil and oil filters from your vehicle. Used oil and oil

filters, indiscriminately discarded, can present a

problem to the environment. Contact an

authorized dealer, service station, or governmental

agency for advice on how and where used oil and

oil filters can be safely discarded in your area.

NGINE

ILTER

The engine oil filter should be replaced with a new

filter at every engine oil change.
Engine Oil Filter Selection
A full-flow type disposable oil filter should be used

for replacement. The quality of replacement filters

varies considerably. Only high quality Mopar®

filters should be used.

NGINE

LEANER

ILTER

For the proper maintenance intervals see

page 385 for gas engines or

page 390 for

diesel engines.

NOTE:

Be sure to follow the “Severe Duty Conditions”

maintenance interval if applicable.

Engine Air Cleaner Filter Selection
The quality of replacement engine air cleaner filter

varies considerably. Only high quality Mopar®

filters should be used.

Engine Air Cleaner Filter Inspection and

Replacement — Gasoline Engine

Follow the recommended maintenance intervals

as shown in the Maintenance Schedule in this

section.

CAUTION!

Do not use chemical flushes in your engine oil as

the chemicals can damage your engine. Such

damage is not covered by the New Vehicle

Limited Warranty.

WARNING!

The air induction system (air cleaner, hoses,

etc.) can provide a measure of protection in the

case of engine backfire. Do not remove the air

induction system (air cleaner, hoses, etc.) unless

such removal is necessary for repair or

maintenance. Make sure that no one is near the

engine compartment before starting the vehicle

with the air induction system (air cleaner, hoses,

etc.) removed. Failure to do so can result in

serious personal injury.

CAUTION!



All air entering the engine intake must be

filtered. The abrasive particles in unfiltered air

will cause rapid wear to engine components.



Many aftermarket performance air filter

elements do not adequately filter the air

entering the engine. Use of such filters can

severely damage your engine.

398

SERVICING AND MAINTENANCE

Engine Air Cleaner Filter Removal
1. Loosen the fasteners from the engine air

cleaner filter cover using a suitable tool.

Engine Air Cleaner Filter Cover

2. Lift the engine air cleaner filer cover to access

the engine air cleaner filter.

3. Remove the engine air cleaner filter from the

housing assembly.

Engine Air Cleaner Filter Cover

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.

Engine Air Cleaner Filter Inspection and

Replacement — Diesel Engine

Follow the recommended maintenance intervals

as shown in the Maintenance Schedule in this

section.
Engine Air Cleaner Filter Removal
1. Loosen the fasteners from the engine air

cleaner filter cover using a suitable tool.

Engine Air Cleaner Filter Cover

1 — Fasteners
2 — Engine Air Cleaner Filter Cover

CAUTION!

Do not overtighten the engine air cleaner filter

cover lid screws or damage to the cover may

result.

1 — Engine Air Cleaner Filter Cover
2 — Fasteners

SERVICING AND MAINTENANCE

399

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.

RAINING

UEL

ATER

EPARATOR

ILTER

— D

IESEL

NGINE

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

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 to the cover 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

400

SERVICING AND MAINTENANCE

(Continued)

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.

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

page 401.

UEL

ILTER

EPLACEMENT

—

IESEL

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

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

CAUTION!

SERVICING AND MAINTENANCE

401

3. Place drain pan under the fuel filter assembly.
4. Open the water drain valve, and let any

accumulated water and fuel drain.

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.

RIMING

NGINE

UEL

— D

IESEL

NGINE

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.

402

SERVICING AND MAINTENANCE

3. Start the engine using the Normal Starting

procedure

page 154.

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.

NTERVENTION

EGENERATION

TRATEGY

— M

ESSAGE

ROCESS

LOW

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

page 128.

IESEL

XHAUST

LUID

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

page 458.

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

operate your vehicle in areas where your

exhaust system can contact anything that can

burn.

SERVICING AND MAINTENANCE

403

(Continued)

CCESSORY

RIVE

ELT

NSPECTION

When inspecting accessory drive belts small

cracks, that run across ribbed surface of belt from

rib to rib, are considered normal. This is not a

reason to replace the belt. However, cracks

running along a rib (not across) are not normal. Any

belt with cracks running along a rib must be

replaced. In addition, have the belt replaced if it

has excessive wear, frayed cords, or severe

glazing.

Accessory Belt (Serpentine Belt)

Conditions that would require replacement:



Rib chunking (one or more ribs has separated

from belt body)



Rib or belt wear



Longitudinal belt cracking (cracks between two

ribs)



Belt slips



“Groove jumping" (belt does not maintain

correct position on pulley)



Belt broken



Noise (objectionable squeal, squeak, or rumble

is heard or felt while drive belt is in operation)

NOTE:

Identify and correct problem before new belt is

installed.

Some conditions can be caused by a faulty

component such as a belt pulley. Belt pulleys

should be carefully inspected for damage and

proper alignment.
Belt replacement on some models requires the

use of special tools, we recommend having your

vehicle serviced at an authorized dealer.

ONDITIONER

AINTENANCE

For best possible performance, your air conditioner

should be checked and serviced by an authorized

dealer at the start of each warm season. This

service should include cleaning of the condenser

fins and a performance test. Drive belt tension

should also be checked at this time.

WARNING!



Do not attempt to inspect an accessory drive

belt with vehicle running.



When working near the radiator cooling fan,

disconnect the fan motor lead. The fan is

temperature controlled and can start at any

time regardless of ignition mode. You could be

injured by the moving fan blades.



You can be badly injured working on or around

a motor vehicle. Only do service work for which

you have the knowledge and the proper equip

ment. If you have any doubt about your ability

to perform a service job, take your vehicle to a

competent mechanic.

WARNING!



Use only refrigerants and compressor lubri

cants approved by the manufacturer for your

air conditioning system. Some unapproved

refrigerants are flammable and can explode,

injuring you. Other unapproved refrigerants or

lubricants can cause the system to fail,

requiring costly repairs. Refer to Warranty

Information Book, located online, for further

warranty information.

404

SERVICING AND MAINTENANCE

Refrigerant Recovery And Recycling

R-1234yf

R-1234yf Air Conditioning Refrigerant is a

Hydrofluoroolefin (HFO) that is endorsed by the

Environmental Protection Agency and is an

ozone-friendly substance with a low

global-warming potential. The manufacturer

recommends that air conditioning service be

performed by an authorized dealer using recovery

and recycling equipment.

NOTE:

Use only manufacturer approved A/C system PAG

compressor oil, and refrigerants.

Cabin Air Filter Replacement

The cabin air filter is located in the fresh air inlet

behind the glove compartment. Perform the

following procedure to replace the filter:
1. Open the glove compartment and remove all

contents.

2. Push up on the glove compartment travel stop

and lower the door.

Glove Compartment Travel Stop

3. Pivot the glove compartment downward.
4. Disengage the two retaining tabs that secure

the cabin air filter access door to the HVAC

housing.

Cabin Air Filter Access Door Retaining Tabs



The air conditioning system contains refrig

erant under high pressure. To avoid risk of

personal injury or damage to the system,

adding refrigerant or any repair requiring lines

to be disconnected should be done by an

experienced technician.

CAUTION!

Do not use chemical flushes in your air

conditioning system as the chemicals can

damage your air conditioning components. Such

damage is not covered by the New Vehicle

Limited Warranty.

WARNING!

Do not remove the cabin air filter while the

vehicle is running, or while the ignition is in the

ACC or ON/RUN mode. With the cabin air filter

removed and the blower operating, the blower

can contact hands and may propel dirt and

debris into your eyes, resulting in personal injury.

SERVICING AND MAINTENANCE

405

5. Remove the cabin air filter from the HVAC air

inlet housing. Pull the filter elements out

pinching them to the right for clearance.

Cabin Air Filter

6. Install the cabin air filter with the air filter

position indicators pointing in the same

direction as removal.

7. Close cabin air filter access door and secure

retaining tabs.

8. Rotate the glove compartment door back into

position, ensuring you have properly engaged

the travel dampener.

Travel Dampener

For the proper maintenance intervals see

page 385 for gas engines or

page 390 for

diesel engines.

ODY

UBRICATION

Locks and all body pivot points, including such

items as seat tracks, door hinge pivot points and

rollers, liftgate, tailgate, decklid, sliding doors, and

hood hinges should be lubricated periodically with

a lithium-based grease, such as Mopar® Spray

White Lube, to ensure quiet, easy operation and to

protect against rust and wear.

Prior to the application of any lubricant, the parts

concerned should be wiped clean to remove dust

and grit. After lubricating, excess oil and grease

should be removed. Particular attention should

also be given to hood latching components to

ensure proper function. When performing other

underhood services, the hood latch, release

mechanism and safety catch should be cleaned

and lubricated.
The external lock cylinders should be lubricated

twice a year, preferably in the Autumn and Spring.

Apply a small amount of a high quality lubricant,

such as Mopar® Lock Cylinder Lubricant, directly

into the lock cylinder.

INDSHIELD

IPER

LADES

Clean the rubber edges of the wiper blades and the

windshield periodically with a sponge or soft cloth

and a mild nonabrasive cleaner. This will remove

accumulations of salt or road film.
Operation of the wipers on dry glass for long

periods may cause deterioration of the wiper

blades. Always use washer fluid when using the

wipers to remove salt or dirt from a dry windshield.
Avoid using the wiper blades to remove frost or ice

from the windshield. Keep the blade rubber out of

contact with petroleum products such as engine

oil, gasoline, etc.

CAUTION!

The cabin air filter is identified with an arrow to

indicate airflow direction through the filter.

Failure to properly install the filter will result in

the need to replace it more often.

1 — Travel Dampener Housing
2 — Travel Dampener Rod

406

SERVICING AND MAINTENANCE

NOTE:

Life expectancy of wiper blades varies depending

on geographical area and frequency of use. If chat

tering, marks, water lines, or wet spots are

present, clean the wiper blades or replace as

necessary.
The wiper blades and wiper arms should be

inspected periodically, not just when wiper

performance problems are experienced. This

inspection should include the following points:



Wear or uneven edges



Foreign material



Hardening or cracking



Deformation or fatigue

If a wiper blade or wiper arm is damaged, replace

the affected wiper arm or blade with a new unit. Do

not attempt to repair a wiper arm or blade that is

damaged.

Wiper Blade Removal/Installation

1. Lift the wiper arm to raise the wiper blade off

of the glass, until the wiper arm is in the full

up position.

Wiper Blade With Release Tab In Locked Position

2. To disengage the wiper blade from the wiper

arm, press the release tab on the wiper blade,

and while holding the wiper arm with one

hand, slide the wiper blade down towards the

base of the wiper arm.

Wiper Blade With Release Tab In Unlocked Position

3. With the wiper blade disengaged, remove the

wiper blade from the wiper arm.

4. Gently lower the wiper arm onto the glass.

Installing The Front Wipers
1. Lift the wiper arm off of the glass, until the

wiper arm is in the full up position.

2. Position the wiper blade near the hook on the

tip of the wiper arm.

3. Slide the wiper blade up into the hook on the

wiper arm, latch engagement will be

accompanied by an audible click.

4. Gently lower the wiper blade onto the glass.

CAUTION!

Do not allow the wiper arm to spring back

against the glass without the wiper blade in

place or the glass may be damaged.

1 — Wiper Blade
2 — Wiper Arm
3 — Release Tab

1 — Wiper Blade
2 — Wiper Arm J Hook
3 — J Hook Retainer

SERVICING AND MAINTENANCE

407

(Continued)

XHAUST

YSTEM

The best protection against carbon monoxide entry

into the vehicle body is a properly maintained

engine exhaust system.
If you notice a change in the sound of the exhaust

system, or if the exhaust fumes can be detected

inside the vehicle, or when the underside or rear of

the vehicle is damaged, have an authorized

technician inspect the complete exhaust system

and adjacent body areas for broken, damaged,

deteriorated, or mispositioned parts. Open seams

or loose connections could permit exhaust fumes

to seep into the passenger compartment. In

addition, have the exhaust system inspected each

time the vehicle is raised for lubrication or oil

change. Replace as required.

Under normal operating conditions, the catalytic

converter will not require maintenance. However, it

is important to keep the engine properly tuned to

ensure proper catalyst operation and prevent

possible catalyst damage.
NOTE:

Intentional tampering with emissions control

systems can result in civil penalties being

assessed against you.
In unusual situations involving grossly

malfunctioning engine operation, a scorching odor

may suggest severe and abnormal catalyst

overheating. If this occurs, stop the vehicle, turn off

the engine and allow it to cool. Service, including a

tune-up to manufacturer's specifications, should

be obtained immediately.
To minimize the possibility of catalytic converter

damage:



Do not interrupt the ignition when the transmis

sion is in gear and the vehicle is in motion.



Do not try to start the vehicle by pushing or

towing the vehicle.



Do not idle the engine with any ignition compo

nents disconnected or removed, such as when

diagnostic testing, or for prolonged periods

during very rough idle or malfunctioning oper

ating conditions.

WARNING!



Exhaust gases can injure or kill. They contain

Carbon Monoxide (CO), which is colorless and

odorless. Breathing it can make you uncon

scious and can eventually poison you. To

avoid breathing CO see

page 357.



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 operate your vehicle in areas where

your exhaust system can contact anything that

can burn.

CAUTION!



The catalytic converter requires the use of

unleaded fuel only. Leaded gasoline will

destroy the effectiveness of the catalyst as an

emissions control device, may seriously

reduce engine performance and cause

serious damage to the engine.



Damage to the catalytic converter can result if

your vehicle is not kept in proper operating

condition. In the event of engine malfunction,

particularly involving engine misfire or other

apparent loss of performance, have your

vehicle serviced promptly. Continued opera

tion of your vehicle with a severe malfunction

could cause the converter to overheat,

resulting in possible damage to the converter

and vehicle.

WARNING!

408

SERVICING AND MAINTENANCE

OOLING

YSTEM

Coolant Checks

Check the engine coolant (antifreeze) protection

every 12 months (before the onset of freezing

weather, where applicable). If the engine coolant is

dirty or rusty in appearance, the system should be

drained, flushed, and refilled with fresh Organic

Additive Technology (OAT) coolant (conforming to

MS.90032) by an authorized dealer. Check the

front of the A/C condenser (if equipped) or radiator

for any accumulation of bugs, leaves, etc. If dirty,

clean by gently spraying water from a garden hose

vertically down the face of the A/C condenser (if

equipped) or the back of the radiator core.
Check the engine cooling system hoses for brittle

rubber, cracking, tears, cuts, and tightness of the

connection at the coolant recovery bottle and

radiator. Inspect the entire system for leaks. DO

NOT REMOVE THE COOLANT PRESSURE CAP

WHEN THE COOLING SYSTEM IS HOT.

Cooling System — Drain, Flush, And Refill

Some vehicles require special tools to add coolant

properly. Failure to fill these systems properly

could lead to severe internal engine damage. If any

coolant is needed to be added to the system

please contact an authorized dealer.
If the engine coolant (antifreeze) is dirty or

contains visible sediment, have an authorized

dealer clean and flush with OAT coolant

(conforming to MS.90032).
For the proper maintenance intervals see

page 385 for gas engines or

page 390 for

diesel engines.

Selection Of Coolant

For further information

page 458.

NOTE:



Mixing of engine coolant (antifreeze), other than

specified Organic Additive Technology (OAT)

engine coolant, may result in engine damage

and may decrease corrosion protection. OAT

engine coolant is different and should not be

mixed with Hybrid Organic Additive Technology

(HOAT) engine coolant or any “globally compat

ible” coolant. If a non-OAT engine coolant is

introduced into the cooling system in an emer

gency, the cooling system will need to be

drained, flushed, and refilled with fresh OAT

coolant (conforming to MS.90032), by an autho

rized dealer as soon as possible.



Do not use water alone or alcohol-based engine

coolant products. Do not use additional rust

inhibitors or anti-rust products, as they may not

be compatible with the radiator engine coolant

and may plug the radiator.



This vehicle has not been designed for use with

propylene glycol-based engine coolant. Use of

propylene glycol-based engine coolant is not

recommended.



Some vehicles require special tools to add

coolant properly. Failure to fill these systems

properly could lead to severe internal engine

damage. If any coolant is needed to be added to

the system please contact an authorized dealer.

WARNING!



You or others can be badly burned by hot

engine coolant (antifreeze) or steam from your

radiator. If you see or hear steam coming from

under the hood, do not open the hood until the

radiator has had time to cool. Never open a

cooling system pressure cap when the radi

ator or coolant bottle is hot.



Keep hands, tools, clothing, and jewelry away

from the radiator cooling fan when the hood is

raised. The fan starts automatically and may

start at any time, whether the engine is

running or not.



When working near the radiator cooling fan,

disconnect the fan motor lead or turn the igni

tion to the OFF position. The fan is tempera

ture controlled and can start at any time the

ignition is in the ON position.

SERVICING AND MAINTENANCE

409

Adding Coolant

Your vehicle has been built with an improved

engine coolant (OAT coolant conforming to

MS.90032) that allows extended maintenance

intervals. This engine coolant (antifreeze)

can be used up to 10 years or 150,000 miles

(240,000 km) before replacement. To prevent

reducing this extended maintenance period, it is

important that you use the same engine coolant

(OAT coolant conforming to MS.90032) throughout

the life of your vehicle.
Please review these recommendations for using

Organic Additive Technology (OAT) engine coolant

that meets the requirements of the manufacturer

Material Standard MS.90032. When adding

engine coolant (antifreeze):



We recommend using Mopar® Antifreeze/

Coolant 10 Year/150,000 Mile (240,000 km)

Formula OAT (Organic Additive Technology) that

meets the requirements of the manufacturer

Material Standard MS.90032.



Mix a minimum solution of 50% OAT engine

coolant that meets the requirements of the

manufacturer Material Standard MS.90032

and distilled water. Use higher concentrations

(not to exceed 70%) if temperatures below

−34°F (−37°C) are anticipated. Please contact

an authorized dealer for assistance.



Use only high purity water, such as distilled or

deionized water, when mixing the water/engine

coolant solution. The use of lower quality water

will reduce the amount of corrosion protection

in the engine cooling system.

NOTE:



It is the owner's responsibility to maintain the

proper level of protection against freezing

according to the temperatures occurring in the

area where the vehicle is operated.



Some vehicles require special tools to add

coolant properly. Failure to fill these systems

properly could lead to severe internal engine

damage. If any coolant is needed to be added to

the system, please contact an authorized

dealer.



Mixing engine coolant types is not recom

mended and can result in cooling system

damage. If HOAT and OAT coolant are mixed in

an emergency, have an authorized dealer drain,

flush, and refill with OAT coolant (conforming to

MS.90032) as soon as possible.

Cooling System Pressure Cap

The cap must be fully tightened to prevent loss of

engine coolant (antifreeze), and to ensure that

engine coolant will return to the radiator from the

coolant expansion bottle/recovery tank if so

equipped.

The cap should be inspected and cleaned if there

is any accumulation of foreign material on the

sealing surfaces.

Disposal Of Used Coolant

Used ethylene glycol-based coolant (antifreeze)

OAT or HOAT, is a regulated substance requiring

proper disposal. Check with your local authorities

to determine the disposal rules for your

community. To prevent ingestion by animals or

children, do not store ethylene glycol-based

coolant in open containers or allow it to remain in

puddles on the ground, clean up any ground spills

immediately. If ingested, seek emergency

assistance immediately.

WARNING!



Do not open hot engine cooling system. Never

add engine coolant (antifreeze) when the

engine is overheated. Do not loosen or

remove the cap to cool an overheated engine.

Heat causes pressure to build-up in the

cooling system. To prevent scalding or injury,

do not remove the pressure cap while the

system is hot or under pressure.



Do not use a pressure cap other than the one

specified for your vehicle. Personal injury or

engine damage may result.

410

SERVICING AND MAINTENANCE

Coolant Level

The coolant bottle provides a quick visual method

for determining that the coolant level is adequate.

With the engine in the off and cold, the level of the

engine coolant (antifreeze) in the bottle should be

between the ranges indicated on the bottle.
The radiator normally remains completely full, so

there is no need to remove the radiator/coolant

pressure cap unless checking for engine coolant

freeze point or replacing coolant. Advise your

service attendant of this. As long as the engine

operating temperature is satisfactory, the coolant

only needs to be checked once a month.
When additional engine coolant is needed to

maintain the proper level, only OAT coolant that

meets the requirements of FCA Material Standard

MS.90032 should be added to the coolant bottle.

Do not overfill.

Cooling System Notes

NOTE:

When the vehicle is stopped after a few miles/kilo

meters of operation, you may observe vapor

coming from the front of the engine compartment.

This is normally a result of moisture from rain,

snow, or high humidity accumulating on the

radiator and being vaporized when the thermostat

opens, allowing hot engine coolant (antifreeze) to

enter the radiator.

If an examination of your engine compartment

shows no evidence of radiator or hose leaks, the

vehicle may be safely driven. The vapor will soon

dissipate.



Do not overfill the coolant expansion bottle.



Check the freezing point of the coolant in the

radiator and in the coolant expansion bottle. If

determined that more engine coolant needs to

be added to the radiator, the contents of the

coolant expansion bottle must also be protected

against freezing.



If frequent engine coolant additions are

required, the cooling system should be pressure

tested for leaks.



Maintain engine coolant concentration at a

minimum of 50% OAT coolant (conforming to

MS.90032) and distilled water for proper corro

sion protection of your engine which contains

aluminum components.



Make sure that the coolant expansion bottle

overflow hoses are not kinked or obstructed.



Keep the front of the radiator clean. With air

conditioning, keep the front of the condenser

clean.



Do not change the thermostat for Summer or

Winter operation. If replacement is ever neces

sary, install ONLY the correct type thermostat.

Other designs may result in unsatisfactory

engine system performance, poor gas mileage,

and increased emissions.

HARGE

OOLER

— I

NTER

-C

OOLER

IESEL

NGINE

)

The charge air cooler is positioned in front of the

radiator and the air conditioner condenser. Air

enters the engine through the air cleaner and

passes through the turbocharger, where it is

pressurized. This pressurized air rapidly reaches

high temperature. The air is then directed through

a hose to the charge air cooler and through

another hose to the intake manifold of the engine.

This cooling process enables more efficient

burning of fuel resulting in fewer emissions.
To guarantee optimum performance of the system,

keep the surfaces of the charge air cooler,

condenser and radiator clean and free of debris.

Periodically check the hoses leading to and from

the charge air cooler for cracks or loose clamps

resulting in loss of pressure and reduced engine

performance.

Jeep Gladiator (2022 year). Manual in english - page 25