2008 JEEP WRANGLER overheating

Regular cleaning of the inside of the windows with a
non-filming cleaning solution (vinegar and water works
very well) will help prevent contaminates (cigarette
smoke, perfumes, etc.) from sticking to the windows.
Contaminates increase the rate of window fogging.
Summer Operation
Air conditioned vehicles must be protected with a high
quality antifreeze coolant during summer to provide
proper corrosion protection and to raise the boiling point
of the coolant for protection against overheating. A 50 %
concentration is recommended. Refer to Fluids and
Genuine Parts in Section 7 for the proper coolant type.
When using the air conditioner in extremely heavy traffic
in hot weather especially when towing a trailer, addi-
tional engine cooling may be required. If this situation is
encountered, operate the transmission in a lower gear to
increase engine RPM, coolant flow and fan speed. When
stopped in heavy traffic, it may be necessary to shift intoNEUTRAL (N) and depress the accelerator slightly for
fast idle operation to increase coolant flow and fan speed.
Winter Operation
When operating the system during the winter months,
make sure the air intake, located directly in front of the
windshield, is free of ice, slush, snow, or other obstruc-
tions.
Vacation Storage
Anytime you store your vehicle, or keep it out of service
(i.e., vacation) for two weeks or more, run the air
conditioning system at idle for about five minutes in the
fresh air and high blower setting. This will ensure
adequate system lubrication to minimize the possibility
of compressor damage when the system is started again.
266 UNDERSTANDING YOUR INSTRUMENT PANEL

IF YOUR ENGINE OVERHEATS
In any of the following situations, you can reduce the
potential for overheating by taking the appropriate ac-
tion.
•On the highways — Slow down.
•In city traffic — While stopped, shift transmission into
NEUTRAL, but do not increase engine idle speed.
NOTE: There are steps that you can take to slow down
an impending overheat condition. If your air conditioner
is on, turn it off. The air conditioning system adds heat to
the engine cooling system and turning off the A/C
removes this heat. You can also turn the Temperature
Control to maximum heat, the Mode Control to floor, and
the Fan 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.
CAUTION!
Driving with a hot cooling system could damage
your vehicle. If the temperature gauge reads HOT
(H), pull over and stop the vehicle. Idle the vehicle
with the air conditioner turned off until the pointer
drops back into the normal range. If the pointer
remains on HOT (H), and you hear continuous
chimes, turn the engine off immediately, and call for
service.
WHAT TO DO IN EMERGENCIES 365
6

CAUTION!
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.
WARNING!
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 vehicle in areas
where your exhaust system can contact anything that
can burn.
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.
MAINTAINING YOUR VEHICLE 387
7

Jacking............................. 366
Jump Starting ......................... 371
Tow Hooks .......................... 374
Emission Control System Maintenance ......380,428
Engine ................................ 75
Air Cleaner .......................... 389
Block Heater ......................... 275
Break-In Recommendations ................ 75
Compartment ......................... 378
Compartment Identification ............... 378
Exhaust Gas Caution .................. 75,339
Fails to Start .......................... 273
Flooded, Starting ...................... 273
Fuel Requirements .................. 336,424
Jump Starting ......................... 371
Oil .............................. 383,424
Oil Disposal .......................... 385
Oil Filter ............................ 385
Oil Selection .......................... 424 Operation
............................ 75
Overheating .......................... 365
Starting ............................. 271
Temperature Gauge ..................... 209
Engine Oil Viscosity ...................... 384
Engine Oil Viscosity Chart ................. 384
Enhanced Accident Response Feature .......... 59
Entry System, Illuminated .................. 19
Event Data Recorder ...................... 60
Exhaust Gas Caution ................... 75,339
Exhaust System ......................... 393
Extender, Seat Belt ........................ 50
Exterior Finish Care ...................... 407
Fabric Care ......................... 409,411
Fabric Top ............................. 411
Filters Air Cleaner .......................... 389
Engine Fuel .......................... 388
450 INDEX

Trip .............................210,211
Off-Pavement Driving (Off-Road) ............ 294
Off-Road Driving (Off-Pavement) ............ 294
Oil Change Indicator ..................... 212
Oil Change Indicator, Reset ................. 212
Oil, Engine ............................ 383
Capacity ............................ 424
Dipstick ............................. 383
Filter ............................... 385
Identification Logo ..................... 384
Materials Added to ..................... 385
Pressure Warning Light .................. 207
Recommendation ................... 384,424
Viscosity .......................... 384,424
Oil Pressure Light ....................... 207
Onboard Diagnostic System ..............379,380
Outside Rearview Mirrors .................. 84
Overheating, Engine ...................... 365
Owner’s Manual (Operator Manual) .......... 441Paint Care
............................. 406
Paint Damage .......................... 406
Panic Alarm ............................ 21
Parking Brake .......................... 308
Passing Light ........................... 99
PCV Valve ............................ 388
Pets .................................. 74
Phone, Cellular .................... 85,250,251
Phone, Hands-Free (UConnect™) ........85,250,251
Placard, Tire and Loading Information ......... 318
Polishing and Waxing ..................... 407
Port Universal Serial Bus (USB) ................ 250
USB ................................ 250
Power Distribution Center (Fuses) ............... 413
Door Locks ........................... 33
Steering .......................... 31 1,391
Windows ............................. 36
456 INDEX