engine overheat JEEP WRANGLER 2011 JK / 3.G User Guide

NOTE:If your vehicle is equipped with Traction Con-
trol or Electronic Stability Control (ESC), turn the system
OFF before attempting to “rock” the vehicle.
CAUTION!
•When “rocking” a stuck vehicle by moving be-
tween DRIVE/1st gear and REVERSE, do not spin
the wheels faster than 15 mph (24 km/h), or drive-
train 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
transmission shifting occurring).
WARNING!
Fast spinning tires can be dangerous. Forces gener-
ated 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 vehi-
cle’s wheels faster than 30 mph (48 km/h) or for
longer than 30 seconds continuously without stop-
ping when you are stuck and do not let anyone near
a spinning wheel, no matter what the speed.
EMERGENCY TOW HOOKS — IF EQUIPPED
If your vehicle is equipped with tow hooks, they are
mounted in the front and the rear.
NOTE: For off-road recovery, it is recommended to use
both of the front tow hooks to minimize the risk of
damage to the vehicle.
496 WHAT TO DO IN EMERGENCIES

WARNING!
•Exhaust gases can injure or kill. They contain
carbon monoxide (CO), which is colorless and
odorless. Breathing it can make you unconscious
and can eventually poison you. To avoid breathing
CO, refer to “Safety Tips/Exhaust Gas” in “Things
To Know Before Starting Your Vehicle” for further
information.
•A hot exhaust system can start a fire if you park
over materials that can burn. Such materials might
be grass or leaves coming into contact with your
exhaust system. Do not park or operate your ve-
hicle in areas where your exhaust system can
contact anything that can burn.
CAUTION!
•The catalytic converter requires the use of un-
leaded fuel only. Leaded gasoline will destroy the
effectiveness of the catalyst as an emissions con-
trol device and may seriously reduce engine per-
formance 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 operation of your vehicle with a severe
malfunction could cause the converter to overheat,
resulting in possible damage to the converter and
vehicle.
518 MAINTAINING YOUR VEHICLE

Under normal operating conditions, the catalytic con-
verter will not require maintenance. However, it is im-
portant to keep the engine properly tuned to assure
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 specifica-
tions, should be obtained immediately. To minimize the possibility of catalytic converter dam-
age:
•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.
7
MAINTAINING YOUR VEHICLE 519

Please note that it is the owner’s responsibility to main-
tain the proper level of protection against freezing ac-
cording to the temperatures occurring in the area where
the vehicle is operated.
NOTE:Mixing engine coolant (antifreeze) types will
decrease the life of the engine coolant (antifreeze) and
will require more frequent coolant changes.
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
reserve tank.
The cap should be inspected and cleaned if there is any
accumulation of foreign material on the sealing surfaces.
WARNING!
The warning words DO NOT OPEN HOT on the
cooling system pressure cap are a safety precaution.
Never add engine coolant (antifreeze) when the en-
gine 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.
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 ani-
mals or children, do not store ethylene glycol based
engine coolant (antifreeze) in open containers or allow it
7
MAINTAINING YOUR VEHICLE 523

Emergency Brake........................ 406
Emergency, In Case of Jacking ............................ 485
Jump Starting ....................... 491
Tow Hooks ......................... 496
Emission Control System Maintenance ......... 507
Engine Air Cleaner ......................... 512
Block Heater ........................ 373
Break-In Recommendations .............. 85
Compartment ....................... 505
Compartment Identification ............. 505
Exhaust Gas Caution ................86,456
Fails to Start ........................ 371
Flooded, Starting ..................... 371
Fuel Requirements ................. 452,549
Jump Starting ....................... 491
Oil ............................ 510,549Oil Change Interval
................... 289
Oil Disposal ........................ 512
Oil Filter ........................... 512
Oil Selection ........................ 549
Overheating ........................ 484
Starting ........................... 370
Temperature Gauge ................... 271
Engine Oil Viscosity ...................... 511
Engine Oil Viscosity Chart ................. 511
Enhanced Accident Response Feature .......... 67
Entry System, Illuminated .................. 20
Ethanol ............................... 453
Event Data Recorder ...................... 70
Exhaust Gas Caution ................... 86,456
Exhaust System ....................... 86,517
Extender, Seat Belt ........................ 58
Exterior Finish Care ...................... 533
Exterior Lights .......................... 89
586 INDEX

Onboard Diagnostic System..............506,507
Operator Manual (Owner’s Manual) ............ 6
Outside Rearview Mirrors .................. 97
Overheating, Engine ................... 271,484
Owner’s Manual (Operator Manual) .........6,577
Paint Care ............................. 532
Paint Damage .......................... 532
Panic Alarm ............................ 23
Parking Brake .......................... 406
Passing Light ........................... 152
Personal Settings ........................ 294
Pets .................................. 84
Phone, Cellular .......................... 99
Phone, Hands-Free (Uconnect™) .............. 99
Placard, Tire and Loading Information ......... 432
Polishing and Waxing ..................... 533 Power
Door Locks ......................... 34
Inverter ........................... 166
Mirrors ............................ 98
Steering ........................ 405,406
Windows ........................... 40
Pregnant Women and Seat Belts .............. 58
Preparation for Jacking .................... 487
Pretensioners Seat Belts ........................... 56
Programmable Electronic Features ............ 294
Radial Ply Tires ......................... 439
Radio Operation ........................ 351
Rear Axle (Differential) .................... 531
Rear Swing Gate ......................... 42
Rear Window Defroster ................... 260
Rear Window Features .................... 259
Rear Wiper/Washer ...................... 259
10
INDEX 593