2007 JEEP GRAND CHEROKEE engine overheat

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 ex-
haust system. Do not park or operate your vehicle in
areas where your exhaust system can contact any-
thing 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.
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.
Crankcase Emission Control System
Proper operation of this system depends on freedom
from sticking or plugging due to deposits. As vehicle
mileage builds up, the PCV valve and passages may
accumulate deposits. If a valve is not working properly,
replace it with a new valve. DO NOT ATTEMPT TO
CLEAN THE OLD PCV VALVE!
MAINTAINING YOUR VEHICLE 369
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Use only high purity water such as distilled or deionized
water when mixing the water/antifreeze (coolant) solu-
tion. The use of lower quality water will reduce the
amount of corrosion protection in the engine cooling
system.
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 antifreeze/coolant types will decrease
the life of the antifreeze/coolant and will require more
frequent antifreeze/coolant changes.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of
antifreeze/coolant, and to insure that antifreeze/coolant
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!
•The warning words DO NOT OPEN HOT on the
cooling system pressure cap are a safety precau-
tion. Never add antifreeze/coolant 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.
•Do not use a pressure cap other than the one
specified for your vehicle. Personal injury or
engine damage may result.
MAINTAINING YOUR VEHICLE 379
7

Electronic Vehicle Information
Center (EVIC).......................180,183
Emergency, In Case of
Freeing Vehicle When Stuck............... 261
Hazard Warning Flasher................. 338
Jacking............................. 339
Jump Starting......................... 346
Tow Hooks.......................... 349
Emission Control System Maintenance......359,412
Engine
Air Cleaner.......................... 367
Block Heater......................... 253
Break-In Recommendations................ 64
Compartment................354,355,356,357
Compartment Identification......354,355,356,357
Cooling ............................. 376
Exhaust Gas Caution.................. 65,309
Fails to Start.......................... 249
Fuel Requirements..................305,407Oil ..............................362,407
Oil Change Interval.................... 363
Oil Disposal.......................... 365
OilFilter ............................ 366
Oil Filter Disposal...................... 365
Oil Selection....................363,364,407
Oil Synthetic......................... 365
Overheating.......................... 338
Starting............................. 249
Temperature Gauge..................... 179
Engine Oil Viscosity...................364,365
Engine Oil Viscosity Chart..............364,365
Enhanced Accident Response Feature.......... 51
Entry System, Illuminated.................. 19
Event Data Recorder...................... 52
Exhaust Gas Caution................ 65,309,376
Exhaust System......................... 375
ExteriorFinishCare ...................... 390
456 INDEX

New Vehicle Break-In Period................ 64
Occupant Restraints....................... 34
Octane Rating, Gasoline (Fuel)............305,306
Odometer..........................180,181
Trip ................................ 180
Off-Pavement Driving (Off-Road)..........268,388
Off-Road Driving (Off-Pavement)..........268,388
Oil, Engine............................ 362
Capacity............................ 407
Change Interval....................... 363
Dipstick............................. 362
Disposal............................ 365
Filter ............................... 366
Filter Disposal........................ 365
Identification Logo..................... 364
Materials Added to..................... 365
Pressure Warning Light.................. 177
Recommendation.................363,364,407Synthetic............................ 365
Viscosity.......................364,365,407
Onboard Diagnostic System..............358,359
Opener, Garage Door (HomeLink) ........... 146
Outside Rearview Mirrors.................. 73
Overdrive............................. 258
Overdrive OFF Switch.................... 258
Overhead Console....................... 145
Overheating, Engine...................179,338
Owner’s Manual (Operator Manual).......... 448
PaintCare ............................. 389
Paint Damage.......................... 389
Panic Alarm............................ 22
Park Assist System, Rear.................. 138
Parking Brake.......................... 272
Passing Light........................... 118
Pedals, Adjustable....................... 124
Pets.................................. 64
INDEX 463
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