engine JEEP WRANGLER 2011 JK / 3.G Owners Manual

NOTE:There are steps that you can take to slow down
an impending overheat condition:
•If your air conditioner (A/C) is on, turn it off. The A/C
system adds heat to the engine cooling system and
turning the A/C off can help remove this heat.
•You can also turn the temperature control to maximum
heat, the mode control to floor and the blower control
to high. This allows the heater core to act as a
supplement to the radiator and aids in removing heat
from the engine 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.
JACKING AND TIRE CHANGING
WARNING!
•Do not attempt to change a tire on the side of the
vehicle close to moving traffic. Pull far enough off
the road to avoid the danger of being hit when
operating the jack or changing the wheel.
•Being under a jacked-up vehicle is dangerous. The
vehicle could slip off the jack and fall on you. You
could be crushed. Never put any part of your body
under a vehicle that is on a jack.
•Never start or run the engine while the vehicle is
on a jack. If you need to get under a raised vehicle,
take it to a service center where it can be raised on
a lift.
(Continued)6
WHAT TO DO IN EMERGENCIES 485

Jacking Instructions
WARNING!
Carefully follow these tire changing warnings to
help prevent personal injury or damage to your
vehicle:
•Always park on a firm, level surface as far from
the edge of the roadway as possible before raising
the vehicle.
•Turn on the Hazard Warning flasher.
•Block the wheel diagonally opposite the wheel to
be raised.
•Set the parking brake firmly and set an automatic
transmission in PARK; a manual transmission in
REVERSE.
•Never start or run the engine with the vehicle on a
jack.(Continued)
WARNING! (Continued)
•Do not let anyone sit in the vehicle when it is on a
jack.
•Do not get under the vehicle when it is on a jack.
•Only use the jack in the positions indicated and
for lifting this vehicle during a tire change.
•If working on or near a roadway, be extremely
careful of motor traffic.
•To assure that spare tires, flat or inflated, are
securely stowed, spares must be stowed with the
valve stem facing the ground.
Jack Warning Label
488 WHAT TO DO IN EMERGENCIES

CAUTION!
Do not use a portable battery booster pack or any
other booster source with a system voltage greater
than 12 Volts or damage to the battery, starter motor,
alternator or electrical system may occur.
WARNING!
Do not attempt jump-starting if the battery is frozen.
It could rupture or explode and cause personal injury.
Preparations For Jump-Start
The battery in your vehicle is located in the right rear of
the engine compartment, behind the Power Distribution
Center.
Positive Battery Post
492 WHAT TO DO IN EMERGENCIES

CAUTION!
Failure to follow these procedures could result in
damage to the charging system of the booster vehicle
or the discharged vehicle.
1. Connect the positive (+)end of the jumper cable to the
positive (+)post of the discharged vehicle.
2. Connect the opposite end of the positive (+)jumper
cable to the positive (+)post of the booster battery.
3. Connect the negative end (-)of the jumper cable to the
negative (-)post of the booster battery.
4. Connect the opposite end of the negative (-)jumper
cable to a good engine ground (exposed metal part of the
discharged vehicle’s engine) away from the battery and
the fuel injection system.
WARNING!
Do not connect the cable to the negative post (-) of the
discharged battery. The resulting electrical spark
could cause the battery to explode and could result in
personal injury.
5. Start the engine in the vehicle that has the booster
battery, let the engine idle a few minutes, and then start
the engine in the vehicle with the discharged battery.
Once the engine is started, remove the jumper cables in
the reverse sequence:
6. Disconnect the negative (-)jumper cable from the
engine ground of the vehicle with the discharged battery.
7. Disconnect the negative end (-)of the jumper cable
from the negative (-)post of the booster battery.
494 WHAT TO DO IN EMERGENCIES

8. Disconnect the opposite end of the positive(+)jumper
cable from the positive (+)post of the booster battery.
9. Disconnect the positive (+)end of the jumper cable
from the positive (+)post of the discharged vehicle.
If frequent jump-starting is required to start your vehicle
you should have the battery and charging system in-
spected at your authorized dealer.
CAUTION!
Accessories that can be plugged into the vehicle
power outlets draw power from the vehicle’s battery,
even when not in use (i.e., cellular phones, etc.).
Eventually, if plugged in long enough, the vehicle’s
battery will discharge sufficiently to degrade battery
life and/or prevent the engine from starting.
FREEING A STUCK VEHICLE
If your vehicle becomes stuck in mud, sand or snow, it
can often be moved by a rocking motion. Turn your
steering wheel right and left to clear the area around the
front wheels. Then shift back and forth between DRIVE/
1st gear and REVERSE. Using minimal accelerator pedal
pressure to maintain the rocking motion, without spin-
ning the wheels, is most effective.
CAUTION!
Racing the engine or spinning the wheels may lead to
transmission overheating and failure. Allow the en-
gine to idle with the shift lever in NEUTRAL for at
least one minute after every five rocking-motion
cycles. This will minimize overheating and reduce
the risk of transmission failure during prolonged
efforts to free a stuck vehicle.6
WHAT TO DO IN EMERGENCIES 495

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!
•Chains are not recommended for freeing a stuck
vehicle. Chains may break, causing serious injury
or death.
•Stand clear of vehicles when pulling with tow
hooks. Tow straps may become disengaged, caus-
ing serious injury.
CAUTION!
Tow hooks are for emergency use only, to rescue a
vehicle stranded off road. Do not use tow hooks for
tow truck hookup or highway towing. You could
damage your vehicle. Tow straps are recommended
when towing the vehicle, chains may cause vehicle
damage.
SHIFT LEVER OVERRIDE
If a malfunction occurs and the shift lever cannot be
moved out of the PARK position, you can use the
following procedure to temporarily move the shift lever:
1. Firmly set the parking brake.
2. Turn the ignition to the ON/RUN position without
starting the engine.
6
WHAT TO DO IN EMERGENCIES 497

MAINTAINING YOUR VEHICLE
CONTENTS
Engine Compartment — 3.8L ............. 505
 Onboard Diagnostic System — OBD II ...... 506
▫ Loose Fuel Filler Cap Message ........... 506
 Emissions Inspection And Maintenance
Programs ............................ 507
 Replacement Parts ..................... 508
 Dealer Service ........................ 509
 Maintenance Procedures ................. 509
▫ Engine Oil ......................... 510 ▫
Engine Oil Filter ..................... 512
▫ Engine Air Cleaner Filter ............... 512
▫ Maintenance-Free Battery .............. 513
▫ Air Conditioner Maintenance ............ 514
▫ Body Lubrication .................... 515
▫ Windshield Wiper Blades ............... 516
▫ Adding Washer Fluid ................. 516
▫ Exhaust System ..................... 517
▫ Cooling System ..................... 520
7

▫Brake System ....................... 525
▫ Automatic Transmission – If Equipped ..... 527
▫ Hydraulic Clutch Fluid – Manual
Transmission ....................... 530
▫ Manual Transmission – If Equipped ....... 530
▫ Transfer Case ....................... 531
▫ Front/Rear Axle Fluid ................. 531
▫ Appearance Care And Protection From
Corrosion .......................... 532
 Fuses .............................. 539
▫ Totally Integrated Power Module ......... 539
 Vehicle Storage ....................... 545
 Replacement Bulbs .................... 545 
Bulb Replacement ..................... 546
▫ Headlamp ......................... 546
▫ Front Park/Turn Signal ................ 547
▫ Front Side Marker .................... 547
▫ Front Fog Lamp ..................... 547
▫ Rear Tail, Stop, Turn Signal, And Backup
Lamp ............................. 548
▫ Center High-Mounted Stop Lamp
(CHMSL) .......................... 549
 Fluid Capacities ...................... 549
 Fluids, Lubricants And Genuine Parts ....... 550
▫ Engine ............................ 550
▫ Chassis ........................... 551
504 MAINTAINING YOUR VEHICLE

ENGINE COMPARTMENT — 3.8L
1 — Integrated Power Module (Fuses)7 — Engine Coolant Reservoir
2 — Battery 8 — Engine Oil Fill
3 — Automatic Transmission Dipstick 9 — Air Cleaner Filter
4 — Engine Oil Dipstick 10 — Coolant Pressure Cap
5 — Brake Fluid Reservoir 11 — Power Steering Fluid Reservoir
6 — Washer Fluid Reservoir
7
MAINTAINING YOUR VEHICLE 505