fuel type JEEP GRAND CHEROKEE 2007 WK / 3.G Owners Manual

Starting and Operating Cautions — Diesel Engines
WARNING!
NEVER pour fuel or other flammable liquid into the
air inlet opening in an attempt to start the vehicle.
This could result in a flash fire causing serious
personal injury.
•Running a cold engine at high speeds during driving
or idling may damage engine components.
•Before turning off your turbo diesel engine, always
allow the engine to return to normal idle speed andrun for several seconds. This assures proper lubrica-
tion of the turbocharger. This is particularly neces-
sary after any period of hard driving.
Turbocharger “Cool Down”
NOTE:Letting the engine idle after extended operation
allows the turbine housing to cool to normal operating
temperature.
The following chart should be used as a guide in deter-
mining the amount of engine idle time required to
sufficiently cool down the turbocharger before shut
down, depending upon the type of driving and the
amount of cargo.
STARTING AND OPERATING 251
5

2. Economy—
Improper inflation pressures can cause uneven wear
patterns to develop across the tire tread. These abnormal
wear patterns will reduce tread life resulting in a need for
earlier tire replacement. Under inflation also increases
tire rolling resistance and results in higher fuel consump-
tion.
3. Ride Comfort and Vehicle Stability—
Proper tire inflation contributes to a comfortable ride.
Over inflation produces a jarring and uncomfortable ride.
Both under inflation and over inflation affect the stability
of the vehicle and can produce a feeling of sluggish
response or over responsiveness in the steering.
Unequal tire pressures can cause erratic and unpredict-
able steering response.
Unequal tire pressure from side to side may cause the
vehicle to drift left or right.Tire Inflation Pressures
The proper cold tire inflation pressure is listed on either
the face of the driver’s door, or the driver’s side “B” pillar.
The pressure should be checked and adjusted as well as
inspecting for signs of tire wear or visible damage at least
once a month. Use a good quality pocket-type gauge to
Tire Placard Location
288 STARTING AND OPERATING

Change Engine Oil
Road conditions as well as your kind of driving affect the
interval at which your oil should be changed. Check the
following to determine if any apply to you:
•Day or night temperatures are below 32°F (0°C)
•Stop and go driving
•Extensive engine idling
•Driving in dusty conditions
•Short trips of less than 10 miles (16.2 km)
•More than 50% of your driving is at sustained high
speeds during hot weather, above 90°F (32°C)
•Trailer towing
•Taxi, Police, or delivery service (Commercial Service)
•Off road or desert operation
•If equipped for and operating with E-85 (ethanol)
fuel.
IfANYof these apply to you, then change your engine oil
every 3,000 miles (5 000 km) or 3 months, whichever
comes first, and follow the maintenance recommenda-
tions in “Maintenance Schedule B.”
If none of these apply to you, then change your engine oil
every 6,000 miles (10 000 km) or 6 months, whichever
comes first.
NOTE:Under no circumstances should oil change in-
tervals exceed 6,000 miles (10 000 km) or 6 months
whichever comes first.
Engine Oil Selection — Gasoline Engines
For best performance and maximum protection for all
engines under all types of operating conditions, the
manufacturer recommends engine oils that are API Cer-
tified and meet the requirements of DaimlerChrysler
MAINTAINING YOUR VEHICLE 363
7

Material Standard MS-6395. Use Moparor an equiva-
lent oil meeting the specification MS-6395.
Engine Oil Selection - Diesel Engines
For best performance and maximum protection for all
engines under all types of operating conditions, the
manufacturer recommends engine oils that are API Cer-
tified and meet the requirements of DaimlerChrysler
Material Standard MS-11106 or Mercedes Benz MB 229.51
and ACEA C3 qualified engine oils
American Petroleum Institute (API) Engine Oil
Identification Symbol
This symbol means that the oil has
been certified by the American
Petroleum Institute (API). The
manufacturer only recommends
API Certified engine oils that
meet the requirements of
DaimlerChrysler Material Stan-
dard MS-6395. Use Moparor an
equivalent oil meeting the specifi-
cation MS-6395.
Engine Oil Viscosity (3.7L/4.7L/5.7L Engines)
SAE 5W-20 engine oil is recommended for all operating
temperatures. This engine oil improves low tempera-
ture starting and vehicle fuel economy. Your engine oil
filler cap also shows the recommended engine oil
viscosity for your vehicle.
364 MAINTAINING YOUR VEHICLE

ABS (Anti-Lock Brake System)............176,274
Adding Fuel........................... 313
Adding Washer Fluid..................... 165
Adjustable Pedals....................... 124
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 367
Air Conditioner Maintenance............... 371
Air Conditioning........................ 235
Air Conditioning, Operating Tips............ 242
Air Conditioning Refrigerant............... 372
Air Conditioning System.................. 235
AirFilter .............................. 367
Air Pressure, Tires....................... 288
Airbag................................ 43
Airbag Deployment....................... 50
Airbag Light....................... 52,66,176
Airbag Maintenance....................... 51
Alarm (Security Alarm)................. 18,177
Alarm System (Security Alarm)............... 18
Alignment and Balance................... 293Alterations/Modifications, Vehicle............. 9
Antenna, Satellite Radio................... 230
Antifreeze (Engine Coolant)................ 407
Anti-Lock Brake System (ABS)............129,274
Anti-Lock Warning Light.................. 176
Anti-Theft System..................... 18,177
Appearance Care........................ 389
Auto Down Power Windows................ 30
AutomaticDimmingMirror ................. 72
Automatic Door Locks..................... 27
Automatic Headlights..................... 114
Automatic Temperature Control (ATC)......... 236
Automatic Transmission................254,386
Adding Fluid......................... 387
Fluid and Filter Changes................. 386
Fluid Level Check...................... 386
FluidType ........................... 386
Special Additives...................... 388
Torque Converter...................... 260
452 INDEX