2010 JEEP GRAND CHEROKEE engine overheat

inspect the exhaust system each time the vehicle is raised
for lubrication or oil change. Replace as required.
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, fol-
low the preceding safety tips.
CAUTION!
The catalytic converter requires the use of unleaded
fuel only. Leaded gasoline will destroy the effective-
ness of the catalyst as an emissions control device
and may seriously reduce engine performance and
cause serious damage to the engine.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.
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 the
vehicle.
326 MAINTAINING YOUR VEHICLE

NOTE:Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
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 indicate severe
and abnormal catalyst overheating. If this occurs, the
vehicle should be stopped, the engine shut off and the
vehicle allowed to cool. Thereafter, service, including a
tune-up to manufacturer’s specifications, should be ob-
tained immediately. To minimize the possibility of catalyst 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 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
idling or malfunctioning operating conditions.
7
MAINTAINING YOUR VEHICLE 327

NOTE:Mixing engine coolant (antifreeze) types will
decrease the life of the engine coolant (antifreeze) and
will require more frequent engine coolant (antifreeze)
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
recovery bottle.
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 pre-
caution. Never add engine coolant (antifreeze)
when the engine 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.
•Do not use a pressure cap other than the one
specified for your vehicle. Personal injury or en-
gine damage may result.
7
MAINTAINING YOUR VEHICLE 331

Checking Oil Level..................... 318
Compartment ......................... 313
Compartment Identification ............... 313
Coolant (Antifreeze) .................... 328
Cooling ............................. 328
Exhaust Gas Caution .................. 71,286
Fails to Start .......................... 239
Flooded, Starting ...................... 239
Fuel Requirements .................. 282,355
Jump Starting ......................... 304
Oil .............................. 318,355
Oil Change Interval .................... 319
Oil Selection ....................... 319,355
Overheating .......................... 302
Starting ............................. 238
Temperature Gauge .................... 162
Engine Oil Viscosity ...................... 320
Engine Oil Viscosity Chart ................. 320
Enhanced Accident Response Feature .......... 55Entry System, Illuminated
.................. 18
Ethanol ............................... 283
Exhaust Gas Caution ................71,286,326
Exhaust System ....................... 71,325
Exterior Finish Care ...................... 337
Exterior Lights .......................... 73
Filters Air Cleaner .......................... 321
Engine Oil ........................... 321
Engine Oil Disposal .................... 321
Finish Care ............................ 337
Flashers .............................. 302
Hazard Warning ....................... 302
Turn Signal ................... 73,157,351,352
Flipper Glass, Liftgate ..................... 33
Flooded Engine Starting ................... 239
Fluid, Brake ........................... 334
Fluid Capacities ......................... 355
392 INDEX

Multi-Function Control Lever............... 100
New Vehicle Break-In Period ................ 70
Occupant Restraints ................... 34,51,55
Occupant Restraints (Sedan) .............48,51,54
Octane Rating, Gasoline (Fuel) .............. 282
Odometer .......................... 163,164
Trip ................................ 163
Oil, Engine ............................ 318
Capacity ............................ 355
Change Interval ....................... 319
Checking ............................ 318
Disposal ............................ 321
Filter ............................... 321
Filter Disposal ........................ 321
Materials Added to ..................... 320
Pressure Warning Light .................. 160
Recommendation ................... 319,355Viscosity
............................ 355
Onboard Diagnostic System ..............314,315
Opener, Garage Door (HomeLink) ........... 128
Operator Manual (Owner’s Manual) ............ 5
Outside Rearview Mirrors .................. 81
Overhead Console ....................... 127
Overheating, Engine ................... 162,302
Owner’s Manual (Operator Manual) .........5,383
Paint Care ............................. 336
Paint Damage .......................... 336
Panic Alarm ............................ 22
Park Sense System, Rear ................... 119
Parking Brake .......................... 250
Passing Light ........................... 106
Pedals, Adjustable ....................... 114
Personal Settings ........................ 179
Pets .................................. 70
Pets, Transporting ........................ 70
398 INDEX