2004 JEEP GRAND CHEROKEE engine

IF YOUR ENGINE OVERHEATS
In any of the following situations, you can reduce the
potential for overheating by taking the appropriate ac-
tion.
²On the highways Ð Slow down.
²In city traffic Ð While stopped, put transmission in N
(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 ªHº,
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
the ªHº, and you hear continuous chimes, turn the
engine off immediately, and call for service.
WHAT TO DO IN EMERGENCIES 237
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Tire Changing Procedure
Preparation
WARNING!
You can be injured or killed if you try to change a
wheel too close to moving traffic. Pull far enough off
the road to avoid being hit when operating the jack
or changing the wheel.
²Park on a firm, level surface well off the road to
provide ample work space. Put the transmission in P
(Park) and stop the engine. Set the parking brake
firmly and activate the hazard warning flasher.
Avoid jacking up the vehicle with occupants inside. If
the jack should fall, someone in the vehicle could be
hurt.
²Block the front and rear of the
diagonally opposite tire. For
example, if the right front tire
is being changed, block the
left rear wheel.
Instructions
1. Remove the spare tire from under the cargo floor, jack
and jack tools from under the left and right rear seat.
2. Loosen the lug nuts one-half turn counterclockwise.
3. Assemble the jack and jacking tools as shown. Connect
jack handle driver (A) to extension (B), then to the lug
wrench (C).
242 WHAT TO DO IN EMERGENCIES

9. Tighten the lug nuts securely in a crisscross pattern.
Have an authorized service technician check that the
torque is 85-115 ft.lbs. (115-156 N´m) as soon as possible.
10. Secure the jack, lug wrench, jack handle and tire in
the proper locations.WARNING!
²A loose tire or jack thrown forward in a collision
or hard stop could injure someone in the vehicle.
Always stow the jack parts and the extra tire and
wheel in the places provided.
²Carefully follow these tire changing warnings to
help prevent personal injury or damage to your
vehicle:
²Always park on a firm, level surface as far from the
edge of the roadway as possible before raising the
vehicle.
²Block the wheel diagonally opposite the wheel to be
raised.
²Apply the parking brake firmly before jacking.
²Never start the engine with the vehicle on a jack.
WHAT TO DO IN EMERGENCIES 245
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²Do not let anyone sit in the vehicle when it is on a jack.
²Do not get under the vehicle when it is on a jack.
²Only use the jack in the positions indicated.
²If working on or near a roadway, be extremely careful
of motor traffic.
JUMP STARTING PROCEDURE
NOTE:Check the charge indicator on top of the battery.
If the indicator is light or yellow, replace the battery.
1. Wear eye protection and remove any metal jewelry
such as watch bands or bracelets that might make an
unintended electrical contact.
2. When boost is provided by a battery in another
vehicle, park that vehicle within booster cable reach but
without letting the vehicles touch. Set the parking brake,
place the transmission in P (Park), and turn the ignition
to OFF for both vehicles.3. Turn off the heater, radio and all unnecessary electrical
loads.
4. Connect one end of a jumper cable to the positive
terminal of the discharged battery. Connect the other end
of the same cable to the positive terminal of the booster
battery.
5. Connect the other cable, first to the negative terminal
of the booster battery and then connect the other end to
a non-paint metal surface on the engine of the vehicle
with the discharged battery. Make sure you have a good
contact on the engine.
6. Start the engine in the vehicle which has the booster
battery, let the engine idle a few minutes, then start the
engine in the vehicle with the discharged battery.
7. When removing the jumper cables, reverse the above
sequence exactly. Be careful of the moving belts and fan.
246 WHAT TO DO IN EMERGENCIES

WARNING!
Do not attempt to push or tow your vehicle to get it
started. Unburned fuel could enter the catalytic
converter and, once the engine has started, ignite and
damage the converter and vehicle.
EMERGENCY TOW HOOKS Ð IF EQUIPPED
If your vehicle is equipped with tow hooks, they will be
mounted in the front of the vehicle.
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.
WARNING!
Stand clear of vehicles when pulling with tow
hooks. Tow straps and chains may break, causing
serious injury.
TOWING A DISABLED VEHICLE
The manufacturer recommends towing with all four
wheels off the ground. Acceptable methods are to tow the
vehicle on a flatbed or with one end of the vehicle raised
and the other end on a towing dolly.
248 WHAT TO DO IN EMERGENCIES

MAINTAINING YOUR VEHICLE
CONTENTS
m4.0L Engine...........................251
m4.7L/4.7 HO Engine.....................252
mOnboard Diagnostic System Ð OBD II........253
mEmissions Inspection And Maintenance
Programs............................254
mReplacement Parts......................255
mDealer Service.........................255
mMaintenance Procedures..................256
NEngine Oil..........................256NDrive Belts - Check Condition And Tension . . . 261
NSpark Plugs.........................261
NCatalytic Converter....................261
NCrankcase Emission Control System........263
NFuel Filter..........................263
NAir Cleaner Filter.....................264
NMaintenance-Free Battery................264
NAir Conditioner Maintenance.............265
NPower Steering Fluid Check..............266
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NDriveline And Steering Component
Lubrication..........................267
NBody Lubrication.....................267
NWindshield Wiper Blades................268
NWindshield Washers Ð Front And Rear.....268
NExhaust System......................269
NCooling System.......................269
NHoses And Vacuum/Vapor Harnesses.......274
NBrake System........................274
NAutomatic Transmission................277
NTransfer Case........................280
NFront/Rear Axle Fluid..................281NAppearance Care And Protection From
Corrosion...........................281
mFuse Panel...........................286
NInterior Fuses........................286
NUnderhood Fuses
(Power Distribution Center)..............288
mVehicle Storage........................289
mReplacement Bulbs......................289
mFluid Capacities........................291
mRecommended Fluids, Lubricants And Genuine
Parts................................292
NEngine.............................292
NChassis............................293
250 MAINTAINING YOUR VEHICLE

4.0L ENGINE
MAINTAINING YOUR VEHICLE 251
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