2017 JEEP WRANGLER engine overheat

NOTE:Push the ESC Off switch to place the Electronic
Stability Control (ESC) system in Partial Offmode before
rocking the vehicle. Refer to “Electronic Brake Control
System” in “Safety” for further information. Once the
vehicle has been freed, push the ESC Offswitch again to
restore ESC On mode.
WARNING!
Fast spinning tires can be dangerous. Forces generated
by excessive wheel speeds may cause damage, or even
failure, of the axle and tires. A tire could explode and
injure someone. Do not spin your vehicle’s wheels
faster than 30 mph (48 km/h) or for longer than 30
seconds continuously without stopping when you are
stuck and do not let anyone near a spinning wheel, no
matter what the speed.
CAUTION!
•When “rocking” a stuck vehicle by shifting between
DRIVE/2nd gear and REVERSE, do not spin the
wheels faster than 15 mph (24 km/h), or drivetrain
damage may result.
• Revving the engine or spinning the wheels too fast
may lead to transmission overheating and failure. It
can also damage the tires. Do not spin the wheels
above 30 mph (48 km/h) while in gear (no transmis-
sion shifting occurring).
364 IN CASE OF EMERGENCY

CAUTION!(Continued)
•Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition. In
the event of engine malfunction, particularly involv-
ing engine misfire or other apparent loss of perfor-
mance, have your vehicle serviced promptly. Contin-
ued operation of your vehicle with a severe
malfunction could cause the converter to overheat,
resulting in possible damage to the converter and
vehicle.
Under normal operating conditions, the catalytic converter
will not require maintenance. However, it is important to
keep the engine properly tuned to assure proper catalyst
operation and prevent possible catalyst damage.
NOTE: Intentional tampering with emissions control sys-
tems 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 shut off the engine or interrupt the ignition,
when the transmission is in gear and the vehicle is in
motion.
• Do not try to start the engine by pushing or towing the
vehicle.
• Do not idle the engine with any spark plug wires
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough idle
or malfunctioning operating conditions.
Cooling System
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 try to open a cooling system pressure cap when
the radiator or coolant bottle is hot.
8
SERVICING AND MAINTENANCE 395

NOTE:
•Some vehicles require special tools to add coolant prop-
erly. 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 your local
authorized dealer.
• Mixing engine coolant (antifreeze) types is not recom-
mended and can result in cooling system damage. If
HOAT and OAT coolant are mixed in an emergency,
have a authorized dealer drain, flush, and refill with
OAT coolant (conforming to MS.90032) as soon as pos-
sible.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of engine
coolant (antifreeze), and to ensure that engine coolant
(antifreeze) will return to the radiator from the coolant
recovery tank.
The cap should be inspected and cleaned if there is any
accumulation of foreign material on the sealing surfaces.
WARNING!
• Do not open hot engine cooling system. Never add
engine coolant (antifreeze) when the engine is over-
heated. 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 speci-
fied for your vehicle. Personal injury or engine
damage may result.
Disposal Of Used Engine Coolant
Used ethylene glycol-based engine coolant (antifreeze) 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 engine coolant
in open containers or allow it to remain in puddles on the
ground. If ingested by a child or pet, seek emergency
assistance immediately. Clean up any ground spills imme-
diately.
398 SERVICING AND MAINTENANCE

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.
(Continued)
440 TECHNICAL SPECIFICATIONS

Driving................................. .330
Dual Top .............................. .72, 76
Electrical Outlet, Auxiliary (Power Outlet) .........176
Electrical Power Outlets ..................... .176
Electric Remote Mirrors .......................51
Electronic Brake Control System ................215
Anti-Lock Brake System ....................214
Electronic Roll Mitigation ...................224
Traction Control System ....................218
Electronic Speed Control (Cruise Control) .........309
Electronic Stability Control (ESC) ...............218
Electronic Throttle Control Warning Light .........200
Emergency Brake .......................... .288
Emergency, In Case Of Jacking ........................... .353, 405
Jump Starting .......................... .358
Tow Hooks ............................ .367
Emission Control System Maintenance ............211
Engine ................................. .377
Air Cleaner ............................ .381
Block Heater ........................... .287
Break-In Recommendations .................288
Compartment .......................... .377
Compartment Identification .................377 Coolant (Antifreeze)
..................... .443
Cooling .............................. .395
Exhaust Gas Caution ...................279, 441
Fails To Start ........................... .286
Flooded, Starting ........................ .286
Fuel Requirements ....................... .442
Jump Starting .......................... .358
Oil ........................... .380, 442, 443
Oil Change Interval ...................... .195
Oil Filler Cap .......................... .377
Oil Filter .............................. .381
Oil Selection ........................ .380,
442
Oil Synthetic ........................... .381
Overheating ........................... .361
Starting .............................. .285
Engine Oil Viscosity ........................ .380
Engine Oil Viscosity Chart ....................380
Enhanced Accident Response Feature .........256, 368
Ethanol ................................. .439
Exhaust Gas Caution .....................279, 441
Exhaust System ....................... .279, 394
Exterior Lights ......................... .52, 282
Fabric Care .............................. .429
Fabric Top .............................. .429
12
INDEX 513

Filter Disposal.......................... .381
Identification Logo ...................... .380
Materials Added To ...................... .381
Pressure Warning Light ....................200
Recommendation .....................380, 442
Synthetic ............................. .381
Viscosity .......................... .380, 442
Oil Filter, Change ......................... .381
Oil Filter, Selection ......................... .381
Oil Pressure Light ......................... .200
Onboard Diagnostic System ...................210
Operating Precautions ...................... .210
Operator Manual (Owner’s Manual) ...............5
Outside Rearview Mirrors .....................50
Overdrive ............................... .300
Overdrive OFF Switch ...................... .300
Overheating, Engine ....................... .361
Owner’s Manual (Operator Manual) ...........5,506
Paint Care ............................... .427
Parking Brake ............................ .288
Personal Settings .......................... .191
Pets ................................... .278
Phone, Cellular ........................... .472
Phone, Hands-Free (Uconnect) .................472Placard, Tire And Loading Information
...........409
Power Brakes ............................... .436
Door Locks ..............................30
Inverter .............................. .178
Mirrors ................................51
Steering .............................. .308
Windows ...............................71
Power Steering Fluid ....................... .445
Pregnant Women And Seat Belts ................245
Preparation For Jacking ..................... .354
Pretensioners Seat Belts ............................. .245
Programmable Electronic Features ...............191
Radial
Ply Tires ........................... .415
Radiator Cap (Coolant Pressure Cap) .............398
Radio 130 Operating Instructions Auxiliary Mode .........455
Operating Instructions Radio Mode ............449
Radio 130 With Satellite Radio Multimedia Satellite Radio ..................464
Operating Instructions Radio Mode ............455
Radio Frequency General Information ..................20, 24, 26
518 INDEX