Jeep Wrangler JK (2018 year). Instruction

BODYWORK

Protection From Atmospheric Agents

Vehicle body care requirements vary according to geo-
graphic locations and usage. Chemicals that make roads
passable in snow and ice and those that are sprayed on
trees and road surfaces during other seasons are highly
corrosive to the metal in your vehicle. Outside parking,
which exposes your vehicle to airborne contaminants, road
surfaces on which the vehicle is operated, extreme hot or
cold weather and other extreme conditions will have an
adverse effect on paint, metal trim, and underbody protec-
tion.

The following maintenance recommendations will enable
you to obtain maximum benefit from the corrosion resis-
tance built into your vehicle.

What Causes Corrosion?

Corrosion is the result of deterioration or removal of paint
and protective coatings from your vehicle.

The most common causes are:
• Road salt, dirt and moisture accumulation.
• Stone and gravel impact.
• Insects, tree sap and tar.
• Salt in the air near seacoast localities.
• Atmospheric fallout/industrial pollutants.

Body And Underbody Maintenance

Cleaning Headlights

Your vehicle is equipped with plastic headlights and fog
lights that are lighter and less susceptible to stone breakage
than glass headlights.

Plastic is not as scratch resistant as glass and therefore
different lens cleaning procedures must be followed.

To minimize the possibility of scratching the lenses and
reducing light output, avoid wiping with a dry cloth. To
remove road dirt, wash with a mild soap solution followed
by rinsing.

Do not use abrasive cleaning components, solvents, steel
wool or other aggressive material to clean the lenses.

SERVICING AND MAINTENANCE

419

Preserving The Bodywork

Washing
• Wash your vehicle regularly. Always wash your vehicle

in the shade using Mopar Car Wash, or a mild car wash
soap, and rinse the panels completely with clear water.

• If insects, tar, or other similar deposits have accumulated

on your vehicle, use Mopar Super Kleen Bug and Tar
Remover to remove.

• Use a high quality cleaner wax, such as Mopar Cleaner

Wax to remove road film, stains and to protect your
paint finish. Take care never to scratch the paint.

• Avoid using abrasive compounds and power buffing

that may diminish the gloss or thin out the paint finish.

CAUTION!

• Do not use abrasive or strong cleaning materials such

as steel wool or scouring powder that will scratch
metal and painted surfaces.

• Use of power washers exceeding 1,200 psi (8,274 kPa)

can result in damage or removal of paint and decals.

Special Care
• If you drive on salted or dusty roads or if you drive near

the ocean, hose off the undercarriage at least once a
month.

• It is important that the drain holes in the lower edges of

the doors, rocker panels, and trunk be kept clear and
open.

• If you detect any stone chips or scratches in the paint,

touch them up immediately. The cost of such repairs is
considered the responsibility of the owner.

• If your vehicle is damaged due to a collision or similar

cause that destroys the paint and protective coating,
have your vehicle repaired as soon as possible. The cost
of such repairs is considered the responsibility of the
owner.

• If you carry special cargo such as chemicals, fertilizers,

de-icer salt, etc., be sure that such materials are well
packaged and sealed.

• If a lot of driving is done on gravel roads, consider mud

or stone shields behind each wheel.

• Use Mopar Touch Up Paint on scratches as soon as

possible. Your authorized dealer has touch up paint to
match the color of your vehicle.

420

SERVICING AND MAINTENANCE

Appearance Care For Fabric Top Models

To maintain the appearance of your vehicle’s interior trim
and top, follow these precautions:
• Avoid leaving your vehicle unattended with the top

down, as exposure to sun or rain may damage interior
trim.

• Do not use harsh cleaners or bleaching agents on top

material, as damage may result.

• Do not allow any vinyl cleaner to run down and dry on

the paint, leaving a streak.

• After cleaning your vehicle’s fabric top, always make

sure it is completely dry before lowering.

• Be especially careful when washing the windows by

following the directions for “Care of Fabric Top Win-
dows.”

Washing –

Use Mopar Car Wash or equivalent, or mild

soap suds, lukewarm water, and a brush with soft bristles.
If extra cleaning is required, use Mopar Convertible Cloth
Top Cleaner or equivalent, or a mild foaming cleaner on the
entire top, but support the top from underneath.

Rinsing –

Be sure to remove all traces of cleaner by rinsing

the top thoroughly with clean water. Remember to allow
the top to dry before lowering it.

CAUTION!

Failure to follow these cautions may cause interior
water damage, stains or mildew on the top material:
• Avoid high-pressure car washes, as they can damage

the top material. Also, increased water pressure may
force past the weather strips.

• It is recommended that the top be free of water prior

to opening it. Operating the top, opening a door or
lowering a window while the top is wet may allow
water to drip into the vehicle’s interior.

• Use care when washing the vehicle, water pressure

directed at the weather strip seals may cause water to
leak into the vehicle’s interior.

• Careless handling and storage of the removable roof

panels may damage the seals, causing water to leak
into the vehicle’s interior.

• The front panel(s) must be positioned properly to

ensure sealing. Improper installation can cause water
to leak into the vehicle’s interior.

SERVICING AND MAINTENANCE

421

Care Of Fabric Top Windows

Your vehicle’s fabric top has pliable plastic windows which
can be scratched unless special care is taken by following
these directions:

1. Never use a dry cloth to remove dust. Instead, use a

microfiber towel or soft cotton cloth moistened with
cold or warm, clean water, and wipe across the win-
dow, not up and down.

Mopar Jeep Soft Glass Window

Cleaner or equivalent will safely clean all plastic win-
dows without scratching. It removes fine scratches to
improve visibility and provides UV protection to help
prevent yellowing.

2. When washing, never use hot water or anything stron-

ger than a mild soap. Never use solvents such as alcohol
or harsh cleaning agents.

3. Always rinse thoroughly with cold water, then wipe

with a soft and slightly moist, clean cloth.

4. When removing frost, snow or ice, never use a scraper

or de-icing chemicals.

Use warm water only if you must

clean the window quickly.

5. Debris (sand, mud/dirt, dust, or salt) from off-road

driving will have a major impact on zipper operation.
Even normal on-road driving and vehicle washing will

eventually impact window zipper operation. To main-
tain ease of use of the window zippers, each window
zipper should be cleaned and lubricated regularly. Use
Mopar Soft Top Zipper Cleaner and Lubricant or
equivalent to ease zipper operation. Before applying,
make sure the zipper teeth are clear of sand, mud, and
other materials. Clean both sides of the zipper, not just
one side. Rinse both zipper halves with fresh water and
allow to dry. Aggressively work the Mopar Soft Top
Zipper Cleaner and Lubricant or equivalent into the
zipper teeth. If a stuck zipper slide is experienced, work
the Mopar Soft Top Zipper Cleaner and Lubricant or
equivalent into the zipper slide. Several applications
may be required before the zipper comes free.

6. Never paste stickers, gummed labels or any tape to the

windows. Adhesives are hard to remove and may
damage the windows.

INTERIORS

Seats And Fabric Parts

Use Mopar Total Clean to clean fabric upholstery and
carpeting.

422

SERVICING AND MAINTENANCE

WARNING!

Do not use volatile solvents for cleaning purposes.
Many are potentially flammable, and if used in closed
areas they may cause respiratory harm.

Seat Belt Maintenance

Do not bleach, dye or clean the belts with chemical solvents
or abrasive cleaners. This will weaken the fabric. Sun
damage can also weaken the fabric.

If the belts need cleaning, use a mild soap solution or
lukewarm water. Do not remove the belts from the vehicle
to wash them. Dry with a soft cloth.

Replace the belts if they appear frayed or worn or if the
buckles do not work properly.

WARNING!

A frayed or torn belt could rip apart in a collision and
leave you with no protection. Inspect the belt system
periodically, checking for cuts, frays, or loose parts.
Damaged parts must be replaced immediately. Do not
disassemble or modify the system. Seat belt assemblies

(Continued)

WARNING! (Continued)

must be replaced after a collision if they have been
damaged (i.e., bent retractor, torn webbing, etc.).

Plastic And Coated Parts

Use Mopar Total Clean to clean vinyl upholstery.

CAUTION!

• Direct contact of air fresheners, insect repellents,

suntan lotions, or hand sanitizers to the plastic,
painted, or decorated surfaces of the interior may
cause permanent damage. Wipe away immediately.

• Damage caused by these type of products may not be

covered by your New Vehicle Limited Warranty.

Cleaning Plastic Instrument Cluster Lenses

The lenses in front of the instruments in this vehicle are
molded in clear plastic. When cleaning the lenses, care
must be taken to avoid scratching the plastic.

1. Clean with a wet soft cloth. A mild soap solution may be

used, but do not use high alcohol content or abrasive
cleaners. If soap is used, wipe clean with a clean damp cloth.

2. Dry with a soft cloth.

SERVICING AND MAINTENANCE

423

Leather Parts

Mopar Total Clean is specifically recommended for leather
upholstery.

Your leather upholstery can be best preserved by regular
cleaning with a damp soft cloth. Small particles of dirt can
act as an abrasive and damage the leather upholstery and
should be removed promptly with a damp cloth. Stubborn
soils can be removed easily with a soft cloth and Mopar
Total Clean. Care should be taken to avoid soaking your
leather upholstery with any liquid. Please do not use
polishes, oils, cleaning fluids, solvents, detergents, or
ammonia-based cleaners to clean your leather upholstery.
Application of a leather conditioner is not required to
maintain the original condition.

NOTE:

If equipped with light colored leather, it tends to

show any foreign material, dirt, and fabric dye transfer
more so than darker colors. The leather is designed for easy
cleaning, and FCA recommends Mopar total care leather
cleaner applied on a cloth to clean the leather seats as
needed.

CAUTION!

Do not use Alcohol and Alcohol-based and/or Ketone
based cleaning products to clean leather seats, as
damage to the seat may result.

Glass Surfaces

All glass surfaces should be cleaned on a regular basis with
Mopar Glass Cleaner, or any commercial household-type
glass cleaner. Never use an abrasive type cleaner. Use
caution when cleaning the inside rear window equipped
with electric defrosters or windows equipped with radio
antennas. Do not use scrapers or other sharp instruments
that may scratch the elements.

When cleaning the rear view mirror, spray cleaner on the
towel or cloth that you are using. Do not spray cleaner
directly on the mirror.

424

SERVICING AND MAINTENANCE

VEHICLE IDENTIFICATION NUMBER

The Vehicle Identification Number (VIN) is found on the
left front corner of the instrument panel pad, visible from
outside of the vehicle through the windshield. This number
also appears underbody, on the right side of the frame rail
near the center of the vehicle, as well as on the Automobile
Information Disclosure Label affixed to a window on your
vehicle. Save this label for a convenient record of your
vehicle identification number and optional equipment.

The VIN is also stamped on either right or left hand side of
the engine block.

NOTE:

It is illegal to remove or alter the VIN plate.

BRAKE SYSTEM

Your vehicle is equipped with dual hydraulic brake sys-
tems. If either of the two hydraulic systems loses normal
capability, the remaining system will still function. How-
ever, there will be some loss of overall braking effective-
ness. You may notice increased pedal travel during appli-
cation, greater pedal force required to slow or stop, and
potential activation of the Brake Warning Light.

In the event power assist is lost for any reason (i.e.,
repeated brake applications with the engine off) the brakes
will still function. However, the effort required to brake the
vehicle will be much greater than that required with the
power system operating.

WHEEL AND TIRE TORQUE SPECIFICATIONS

Proper lug nut/bolt torque is very important to ensure that
the wheel is properly mounted to the vehicle. Any time a
wheel has been removed and reinstalled on the vehicle, the
lug nuts/bolts should be torqued using a properly cali-
brated torque wrench using a high quality six sided (hex)
deep wall socket.

Vehicle Identification Number

426

TECHNICAL SPECIFICATIONS

Torque Specifications

Lug Nut/Bolt

Torque

**Lug Nut/Bolt

Size

Lug Nut/Bolt

Socket Size

100 Ft-Lbs (135

N·m)

1/2” x 20

19 mm

**Use only your authorized dealer recommended lug nuts/
bolts and clean or remove any dirt or oil before tightening.

Inspect the wheel mounting surface prior to mounting the
tire and remove any corrosion or loose particles.

Tighten the lug nuts/bolts in a star pattern until each
nut/bolt has been tightened twice. Ensure that the socket is
fully engaged on the lug nut/bolt (do not insert it half-
way).

After 25 miles (40 km), check the lug nut/bolt torque to be
sure that all the lug nuts/bolts are properly seated against
the wheel.

Wheel Mounting Surface

Torque Patterns

TECHNICAL SPECIFICATIONS

427

WARNING!

To avoid the risk of forcing the vehicle off the jack, do
not tighten the lug nuts fully until the vehicle has been
lowered. Failure to follow this warning may result in
personal injury.

FUEL REQUIREMENTS

3.6L Engine

This engine is designed to meet all emis-
sions regulations and provide excellent
fuel economy and performance when
using high-quality unleaded “Regular”
gasoline having an octane rating of 87 as
specified by the (R+M)/2 method. The
use of higher octane “Premium” gaso-

line will not provide any benefit over “Regular” gasoline in
these engines.

While operating on gasoline with an octane number of 87,
hearing a light knocking sound from the engine is not a

cause for concern. However, if the engine is heard making
a heavy knocking sound, see your dealer immediately. Use
of gasoline with an octane number lower than 87 can cause
engine failure and may void or not be covered by the New
Vehicle Limited Warranty.

Poor quality gasoline can cause problems such as hard
starting, stalling, and hesitations. If you experience these
symptoms, try another brand of gasoline before consider-
ing service for the vehicle.

Reformulated Gasoline

Many areas of the country require the use of cleaner
burning gasoline referred to as “Reformulated Gasoline”.
Reformulated gasoline contains oxygenates and are specifi-
cally blended to reduce vehicle emissions and improve air
quality.

The use of reformulated gasoline is recommended. Prop-
erly blended reformulated gasoline will provide improved
performance and durability of engine and fuel system
components.

428

TECHNICAL SPECIFICATIONS

Materials Added To Fuel

Besides using unleaded gasoline with the proper octane
rating, gasolines that contain detergents, corrosion and
stability additives are recommended. Using gasolines that
have these additives will help improve fuel economy,
reduce emissions, and maintain vehicle performance.

Designated TOP TIER Detergent Gaso-
line contains a higher level of detergents
to further aide in minimizing engine
and fuel system deposits. When avail-
able, the usage of Top Tier Detergent
gasoline

recommended.

Visit

www.toptiergas.com for a list of TOP

TIER Detergent Gasoline Retailers.

Indiscriminate use of fuel system cleaning agents should be
avoided. Many of these materials intended for gum and
varnish removal may contain active solvents or similar
ingredients. These can harm fuel system gasket and dia-
phragm materials.

Gasoline/Oxygenate Blends

Some fuel suppliers blend unleaded gasoline with oxygen-
ates such as ethanol.

CAUTION!

DO NOT use E-85, gasoline containing methanol, or
gasoline containing more than 15% ethanol (E-15). Use
of these blends may result in starting and drivability
problems, damage critical fuel system components,
cause emissions to exceed the applicable standard,
and/or cause the “Malfunction Indicator Light” to
illuminate. Please observe pump labels as they should
clearly communicate if a fuel contains greater than 15%
ethanol (E-15).

Problems that result from using gasoline containing more
than 15% ethanol (E-15) or gasoline containing methanol
are not the responsibility of the manufacturer and may
void or not be covered under New Vehicle Limited War-
ranty.

Do Not Use E-85 In Non-Flex Fuel Vehicles

Non-Flex Fuel Vehicles (FFV) are compatible with gasoline
containing up to 15% ethanol (E-15). Use of gasoline with
higher ethanol content may void the New Vehicle Limited
Warranty.

TECHNICAL SPECIFICATIONS

429

If a Non-FFV vehicle is inadvertently fueled with E-85 fuel,
the engine will have some or all of these symptoms:
• Operate in a lean mode.
• OBD II “Malfunction Indicator Light” on.
• Poor engine performance.
• Poor cold start and cold drivability.
• Increased risk for fuel system component corrosion.

CNG And LP Fuel System Modifications

Modifications that allow the engine to run on compressed
natural gas (CNG) or liquid propane (LP) may result in
damage to the engine, emissions, and fuel system compo-
nents. Problems that result from running CNG or LP are
not the responsibility of the manufacturer and may void or
not be covered under the New Vehicle Limited Warranty.

MMT In Gasoline

Methylcyclopentadienyl Manganese Tricarbonyl (MMT) is
a manganese-containing metallic additive that is blended
into some gasoline to increase octane. Gasoline blended
with MMT provides no performance advantage beyond
gasoline of the same octane number without MMT. Gaso-
line blended with MMT reduces spark plug life and
reduces emissions system performance in some vehicles.

The manufacturer recommends that gasoline without
MMT be used in your vehicle. The MMT content of
gasoline may not be indicated on the gasoline pump;
therefore, you should ask your gasoline retailer whether
the gasoline contains MMT. MMT is prohibited in Federal
and California reformulated gasoline.

Fuel System Cautions

CAUTION!

Follow these guidelines to maintain your vehicle’s
performance:
• The use of leaded gasoline is prohibited by Federal

law. Using leaded gasoline can impair engine perfor-
mance and damage the emissions control system.

• An out-of-tune engine or certain fuel or ignition

malfunctions can cause the catalytic converter to
overheat. If you notice a pungent burning odor or
some light smoke, your engine may be out of tune or
malfunctioning and may require immediate service.
Contact your authorized dealer for service assistance.

• The use of fuel additives, which are now being sold

as octane enhancers, is not recommended. Most of

(Continued)

430

TECHNICAL SPECIFICATIONS

CAUTION! (Continued)

these products contain high concentrations of metha-
nol. Fuel system damage or vehicle performance
problems resulting from the use of such fuels or
additives is not the responsibility of the manufac-
turer and may void or not be covered under the New
Vehicle Limited Warranty.

NOTE:

Intentional tampering with the emissions control

system can result in civil penalties being assessed against
you.

Carbon Monoxide Warnings

WARNING!

Carbon monoxide (CO) in exhaust gases is deadly.
Follow the precautions below to prevent carbon mon-
oxide poisoning:
• Do not inhale exhaust gases. They contain carbon

monoxide, a colorless and odorless gas, which can
kill. Never run the engine in a closed area, such as a
garage, and never sit in a parked vehicle with the
engine running for an extended period. If the vehicle
is stopped in an open area with the engine running
for more than a short period, adjust the ventilation
system to force fresh, outside air into the vehicle.

• Guard against carbon monoxide with proper main-

tenance. Have the exhaust system inspected every
time the vehicle is raised. Have any abnormal condi-
tions repaired promptly. Until repaired, drive with
all side windows fully open.

TECHNICAL SPECIFICATIONS

431

FLUID CAPACITIES

U.S.

Metric

Fuel (Approximate)
Two Door Models

18.6 Gallons

70 Liters

Four Door Models

22.5 Gallons

85 Liters

Engine Oil with Filter
3.6L Engine

6 Quarts

5.6 Liters

Cooling System *
3.6L Engine (Mopar Antifreeze/
Engine Coolant 10 Year/150,000 Mile
Formula or equivalent)

10.5 Quarts

9.9 Liters

* Includes coolant recovery bottle filled to MAX level.

432

TECHNICAL SPECIFICATIONS

FLUIDS AND LUBRICANTS

Engine

Component

Fluid, Lubricant, or Genuine Part

Engine Coolant

We recommend you use Mopar Antifreeze/Coolant 10
Year/150,000 Mile Formula OAT (Organic Additive Tech-
nology) or equivalent meeting the requirements of FCA
Material Standard MS.90032.

Engine Oil

We recommend you use API Certified SAE 5W-20 Engine
Oil, meeting the requirements of FCA Material Standard
MS-6395 such as Mopar, Pennzoil, and Shell Helix. Refer to
your engine oil filler cap for correct SAE grade.

Engine Oil Filter

We recommend you use Mopar Engine Oil Filter or equiva-
lent.

Spark Plugs

We recommend you use Mopar Spark Plugs.

Fuel Selection

87 Octane, 0-15% Ethanol.

CAUTION!

• Mixing of engine coolant (antifreeze) other than

specified Organic Additive Technology (OAT) en-
gine coolant (antifreeze), may result in engine dam-
age and may decrease corrosion protection. Organic

(Continued)

CAUTION! (Continued)

Additive Technology (OAT) engine coolant is differ-
ent and should not be mixed with Hybrid Organic

(Continued)

TECHNICAL SPECIFICATIONS

433

CAUTION! (Continued)

Additive Technology (HOAT) engine coolant (anti-
freeze) or any “globally compatible” coolant (anti-
freeze). If a non-OAT engine coolant (antifreeze) is
introduced into the cooling system in an emergency,
the cooling system will need to be drained, flushed,
and refilled with fresh OAT coolant (conforming to
MS.90032), by an authorized dealer as soon as pos-
sible.

(Continued)

CAUTION! (Continued)

• Do not use water alone or alcohol-based engine

coolant (antifreeze) products. Do not use additional
rust inhibitors or antirust 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 (antifreeze).
Use of propylene glycol-based engine coolant (anti-
freeze) is not recommended.

Chassis

Component

Fluid, Lubricant, or Genuine Part

Automatic Transmission – If Equipped

Use only ATF+4 Automatic Transmission Fluid. Failure to
use ATF+4 fluid may affect the function or performance of
your transmission. We recommend Mopar ATF+4 fluid.

Manual Transmission – If Equipped

We recommend you use Mopar Manual Transmission
Lubricant meeting the requirements of FCA Material Stan-
dard MS-9224.

434

TECHNICAL SPECIFICATIONS

Jeep Wrangler JK (2018 year). Instruction - part 27