2006 JEEP GRAND CHEROKEE cooling

Adding Engine Coolant
Your vehicle has been built with an improved antifreeze/
coolant that allows extended maintenance intervals. This
antifreeze/coolant can be used up to 5 Years or 100,000
miles before replacement. To prevent reducing this ex-
tended maintenance period, it is important that you use
the same antifreeze/coolant throughout the life of your
vehicle. Please review these recommendations for using
Hybrid Organic Additive Technology (HOAT)
antifreeze/coolant.
When adding antifreeze/coolant, a minimum solution of
50% recommended MoparAntifreeze/ Coolant 5 Year/
100,000 Mile Formula HOAT (Hybrid Organic Additive
Technology), or equivalent, in water should be used. Use
higher concentrations (not to exceed 70%) if temperatures
below -34°F (-37°C) are anticipated.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.
366 MAINTAINING YOUR VEHICLE

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 precaution.
Never add antifreeze/coolant 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.
Disposal of Used Engine Coolant
Used ethylene glycol-based antifreeze/coolant is a regu-
lated substance requiring proper disposal. Check with
your local authorities to determine the disposal rules for
your community. To prevent ingestion by animals andchildren, do not store ethylene glycol-based antifreeze/
coolant in open containers or allow it to remain in
puddles on the ground. If ingested by a child, contact a
physician immediately. Clean up any ground spills im-
mediately.
Engine Coolant Level
The coolant bottle provides a quick visual method for
determining that the antifreeze/coolant level is adequate.
With the engine idling, and warm to normal operating
temperature, the level of the antifreeze/coolant in the
bottle should be between the ranges indicated on the
bottle.
The radiator normally remains completely full, so there is
not need to remove the radiator cap unless checking for
antifreeze/coolant freeze point or replacing antifreeze/
coolant. Advise your service attendant of this. As long as
the engine operating temperature is satisfactory, the
coolant bottle need only be checked once a month.
MAINTAINING YOUR VEHICLE 367
7

When additional antifreeze/coolant is needed to main-
tain the proper level, it should be added to the coolant
bottle. Do not overfill.
Points To Remember
NOTE:When the vehicle is stopped after a few miles
(kilometers) of operation, you may observe vapor coming
from the front of the engine compartment. This is nor-
mally a result of moisture from rain, snow, or high
humidity accumulating on the radiator and being vapor-
ized when the thermostat opens, allowing hot antifreeze/
coolant to enter the radiator.
If an examination of your engine compartment shows no
evidence of radiator or hose leaks, the vehicle may be
safely driven. The vapor will soon dissipate.
•Do not overfill the coolant recovery bottle.
•Check antifreeze/coolant freeze point in the radiator
and in the coolant recovery bottle. If antifreeze/coolant needs to be added, contents of coolant recov-
ery bottle must also be protected against freezing.
•If frequent antifreeze/coolant additions are required,
or if the level in the coolant recovery bottle does not
drop when the engine cools, the cooling system should
be pressure tested for leaks.
•Maintain antifreeze/coolant concentration at 50%
HOAT antifreeze/coolant (minimum) and distilled
water for proper corrosion protection of your engine
which contains aluminum components.
•Make sure that the radiator and coolant recovery
bottle hoses are not kinked or obstructed.
•Keep the front of the radiator clean. If your vehicle is
equipped with air conditioning, keep the front of the
condenser clean, also.
•Do not change the thermostat for summer or winter
operation. If replacement is ever necessary, install
368 MAINTAINING YOUR VEHICLE

ONLY the correct type thermostat. Other designs may
result in unsatisfactory cooling performance, poor gas
mileage, and increased emissions.
Hoses and Vacuum/Vapor Harnesses
Inspect surfaces of hoses and nylon tubing for evidence
of heat and mechanical damage. Hard or soft spots,
brittle rubber, cracking, tears, cuts, abrasions, and exces-
sive swelling indicate deterioration of the rubber.
Pay particular attention to the hoses nearest to high heat
sources such as the exhaust manifold. Inspect hose rout-
ing to be sure hoses do not touch any heat source or
moving component that may cause heat damage or
mechanical wear.
Insure nylon tubing in these areas has not melted or
collapsed. Inspect all hose connections such as clamps
and couplings to make sure they are secure and no leaksare present. Components should be replaced immedi-
ately if there is any evidence of degradation that could
cause failure.
Brake System
In order to assure brake system performance, all brake
system components should be inspected periodically.
Refer to the appropriate“Maintenance Schedule”in
Section 8 for suggested service intervals.
WARNING!
Riding the brakes can lead to brake failure and
possibly an accident. Driving with your foot resting
or riding on the brake pedal can result in abnormally
high brake temperatures, excessive lining wear, and
possible brake damage. You wouldn’t have your full
braking capacity in an emergency.
MAINTAINING YOUR VEHICLE 369
7

FLUID CAPACITIES
U.S. Metric
Fuel (Approximate)20.6 Gallons 78 Liters
Engine Oil with Filter
3.7 Liter Engine (5W-30, API Certified) 5 Qts 4.7 Liters
4.7 Liter Engine (5W-30, API Certified) 6 Qts 5.7 Liters
5.7 Liter Engine (5W-20, API Certified) 7 Qts 6.6 Liters
Cooling System *
3.7 Liter Engine (MoparEngine Coolant/Antifreeze 5 Year/
100,000 Mile Formula)9 Qts 10 Liters
4.7 Liter Engine (MoparEngine Coolant/Antifreeze 5 Year/
100,000 Mile Formula)14.5 Qts 13.7 Liters
5.7 Liter Engine (MoparEngine Coolant/Antifreeze 5 Year/
100,000 Mile Formula)14.5 Qts 13.7 Liters
* Includes heater and coolant recovery bottle filled to MAX level.
392 MAINTAINING YOUR VEHICLE

Caution, Exhaust Gas..................... 153
CD (Compact Disc) Player...............202,216
Cellular Phone.......................... 83
Center High Mounted Stop Light............ 391
Chains, Tire............................ 300
Changing A Flat Tire..................... 330
Chart, Tire Sizing........................ 280
Checks, Safety........................... 70
Child Restraint......................58,64,66
Child Restraint Tether Anchors.............62,64
Child Safety Locks........................ 17
Climate Control......................... 233
Clock...........................204,218,225
Compact Disc (CD) Maintenance............. 232
Compass.............................. 195
Compass Variance....................... 200
Computer, Trip/Travel.................... 195
Console, Overhead....................... 151
Contract, Service........................ 418Converter, Catalytic...................... 355
Cooling System......................... 364
Adding Coolant (Antifreeze).............. 366
Coolant Capacity...................... 392
Coolant Level......................... 367
Disposal of Used Coolant................ 367
Drain, Flush, and Refill.................. 365
Inspection........................... 364
Points to Remember.................... 368
Pressure Cap......................... 366
Radiator Cap......................... 366
Selection of Coolant (Antifreeze).........365,392
Crankcase Emission Control System.......... 357
Cruise Control (Speed Control).............. 148
Cruise Light........................... 185
Cup Holder............................ 164
Customer Assistance..................... 416
Data Recorder, Event...................... 56
426 INDEX

Engine
Air Cleaner.......................... 358
Block Heater......................... 253
Break-In Recommendations................ 68
Compartment......................... 345
Cooling............................. 364
Exhaust Gas Caution..................69,305
Fails to Start.......................... 252
Flooded, Starting...................... 252
Fuel Requirements..................302,392
Jump Starting......................... 336
Oil ..............................351,392
Oil Change Interval.................... 351
Oil Disposal.......................... 354
Oil Filter............................ 354
Oil Filter Disposal...................... 354
Oil Selection.......................... 392
Overheating.......................... 329
Starting............................. 251Temperature Gauge..................... 184
Engine Oil Viscosity...................... 353
Engine Oil Viscosity Chart................. 353
Enhanced Accident Response Feature.......... 55
Entry System, Illuminated.................. 16
Event Data Recorder...................... 56
Exhaust Gas Caution...................69,305
Exhaust System......................... 363
Exterior Finish Care...................... 376
Filters
Air Cleaner.......................... 358
Engine Oil........................... 354
Finish Care............................ 376
Flashers.............................. 328
Hazard Warning....................... 328
Turn Signal.....................180,388,390
Flipper Glass, Liftgate..................... 26
Flooded Engine Starting................... 252
428 INDEX

Cooling System Tips.................... 320
Hitches............................. 311
Minimum Requirements................. 314
Trailer and Tongue Weight................ 313
Wiring.............................. 317
Trailer Towing Guide..................... 312
Trailer Weight.......................... 312
Transfer Case........................... 374
Maintenance.......................... 374
Transmission
Automatic........................254,371
Maintenance.......................... 371
Range Indicator....................... 186
Shifting............................. 254
Transmitter Battery Service (Remote Keyless Entry) . 23
Transmitter, Garage Door Opener (HomeLink) . . 152
Transmitter, Remote Keyless Entry (RKE)........ 20
Tread Wear Indicators.................... 291
Turn Signals...................126,180,388,390Underhood Fuses.....................382,384
Uniform Tire Quality Grades................ 421
Universal Transmitter..................... 152
Upholstery Care........................ 378
Vacuum/Vapor Harnesses................. 369
Vanity Mirrors........................... 82
Variance, Compass....................... 200
Vehicle Identification Number (VIN)............ 7
Vehicle Loading......................... 284
Vehicle Modifications/Alterations.............. 8
Vehicle Storage.......................245,385
Video Entertainment System
(Rear Seat Video System).................. 225
Viscosity, Engine Oil...................... 353
Warning Flasher, Hazard.................. 328
Warnings and Cautions..................... 7
Warranty Information..................... 419
440 INDEX