2007 JEEP GRAND CHEROKEE cooling

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.
Cooling System
WARNING!
²When working near the radiator cooling fan, dis-
connect the fan motor lead or turn the ignition
switch to the OFF position. The fan is temperature
controlled and can start at any time the ignition
switch is in the ON position.
²You or others can be badly burned by hot coolant
or steam from your radiator. If you see or hear
steam coming from under the hood, don't open
the hood until the radiator has had time to cool.
Never try to open a cooling system pressure cap
when the radiator is hot.
Coolant Checks
Check engine coolant (antifreeze) protection every 12
months (before the onset of freezing weather, where
318 MAINTAINING YOUR VEHICLE

applicable). If coolant is dirty or rusty in appearance, the
system should be drained, flushed and refilled with fresh
coolant. Check the front of the A/C condenser for any
accumulation of bugs, leaves, etc. If dirty, clean by gently
spraying water from a garden hose vertically down the
face of the condenser.
Check the coolant recovery bottle tubing for brittle rub-
ber, cracking, tears, cuts and tightness of the connection
at the bottle and radiator. Inspect the entire system for
leaks.
With the engine at normal operating temperature (but
not running), check the cooling system pressure cap for
proper vacuum sealing by draining a small amount of
coolant from the radiator drain cock. If the cap is sealing
properly, the engine coolant (antifreeze) will begin to
drain from the coolant recovery bottle. DO NOT RE-
MOVE THE COOLANT PRESSURE CAP WHEN THE
COOLING SYSTEM IS HOT.Cooling System Ð Drain, Flush and Refill
At the intervals shown on the appropriate ªMaintenance
Schedule,º the system should be drained, flushed and
refilled.
If the solution is dirty or contains a considerable amount
of sediment, clean and flush with a reliable cooling
system cleaner. Follow with a thorough rinsing to remove
all deposits and chemicals. Properly dispose of old
antifreeze solution.
Selection Of Coolant
Use only the manufacturer's recommended coolant, refer
to Fluids, Lubricants and Genuine Parts for correct
coolant type.
MAINTAINING YOUR VEHICLE 319
7

CAUTION!
Mixing of coolants other than specified HOAT en-
gine coolants, may result in engine damage and may
decrease corrosion protection. If a non-HOAT cool-
ant is introduced into the cooling system in an
emergency, it should be replaced with the specified
coolant as soon as possible.
Do not use plain water alone or alcohol base engine
coolant (antifreeze) products. Do not use additional
rust inhibitors or antirust products, as they may not
be compatible with the radiator engine coolant and
may plug the radiator.
This vehicle has not been designed for use with
Propylene Glycol based coolants. Use of Propylene
Glycol based coolants is not recommended.
Adding Coolant
Your vehicle has been built with an improved engine
coolant that allows extended maintenance intervals. This
coolant can be used up to 5 Years or 100,000 miles before
replacement. To prevent reducing this extended mainte-
nance period, it is important that you use the same
coolant throughout the life of your vehicle. Please review
these recommendations for using Hybrid Organic Addi-
tive Technology (HOAT) coolant.
When adding coolant, a minimum solution of 50% rec-
ommended Mopar Antifreeze/ Coolant 5 Year/100,000
Mile Formula HOAT (Hybrid Organic Additive Technol-
ogy), or equivalent, in water should be used. Use higher
concentrations (not to exceed 70%) if temperatures below
234ÉF (237ÉC ) are anticipated.
Use only high purity water such as distilled or deionized
water when mixing the water/engine coolant solution.
320 MAINTAINING YOUR VEHICLE

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 coolant types will decrease the life of the
engine coolant and will require more frequent coolant
changes.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of
coolant, and to insure that coolant 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!
²The warning words ªDO NOT OPEN HOTº on
the cooling system pressure cap are a safety pre-
caution. Never add 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.
²Do not use a pressure cap other than the one
specified for your vehicle. Personal injury or
engine damage may result.
Disposal of Used Engine Coolant
Used ethylene glycol based engine coolant is a regulated
substance requiring proper disposal. Check with your
local authorities to determine the disposal rules for your
community. To prevent ingestion by animals or children
MAINTAINING YOUR VEHICLE 321
7

²If frequent 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 pres-
sure tested for leaks.
²Maintain coolant concentration at 50% HOAT engine
coolant (minimum) and distilled water for proper
corrosion protection of your engine which contains
aluminum components.
²Make sure that the radiator and coolant recovery
bottle overflow hoses are not kinked or obstructed.
²Keep the front of the radiator clean. If your vehicle is
equipped with air conditioning, keep the front of the
condenser clean, also.
²Do not change the thermostat for summer or winter
operation. If replacement is ever necessary, installONLY the correct type thermostat. Other designs may
result in unsatisfactory coolant 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 those hoses nearest to high
heat sources such as the exhaust manifold. Inspect hose
routing to be sure hoses do not come in contact with any
heat source or moving component which may cause heat
damage or mechanical wear.
Insure nylon tubing in these areas has not melted or
collapsed.
MAINTAINING YOUR VEHICLE 323
7

FLUID CAPACITIES
U.S. Metric
Fuel (Approximate)21 Gallons 79 Liters
Engine Oil with Filter
6.1 Liter Engine (SAE 0W-40, API Certified) 7 Qts 6.6 Liters
Cooling System *
6.1 Liter Engine (MopartEngine Coolant/Antifreeze 5 Year/
100,000 Mile Formula)14.8 Qts 14 Liters
* Includes heater and coolant recovery bottle filled to MAX level.
346 MAINTAINING YOUR VEHICLE

Cellular Phone.......................... 78
Center High Mounted Stop Light............ 345
Chart, Tire Sizing........................ 251
Checks, Safety.........................66,67
Child Restraint......................54,60,62
Child Restraint Tether Anchors.............58,60
Child Safety Locks........................ 28
Clean Air Gasoline....................... 271
Climate Control......................... 222
Clock.............................197,210
Compact Disc (CD) Maintenance............. 221
Compass.............................. 186
Compass Variance....................... 193
Computer, Trip/Travel.................... 186
Console, Overhead....................... 144
Contract, Service........................ 372
Coolant Pressure Cap (Radiator Cap).......... 321
Cooling System......................... 318
Adding Coolant (Antifreeze).............. 320Coolant Capacity...................... 346
Coolant Level......................318,322
Disposal of Used Coolant................ 321
Drain, Flush, and Refill.................. 319
Inspection........................... 322
Points to Remember.................... 322
Pressure Cap......................... 321
Radiator Cap......................... 321
Selection of Coolant (Antifreeze).........319,346
Cruise Control (Speed Control).............. 128
Cruise Light........................... 177
Cup Holder............................ 157
Customer Assistance..................... 370
Data Recorder, Event...................... 52
Daytime Running Lights................... 117
Dealer Service.......................... 304
Defroster, Rear Window................... 165
Defroster, Windshield...................66,226
380 INDEX

Diagnostic System, Onboard................ 301
Dimmer Switch, Headlight................. 119
Dipsticks
Power Steering........................ 314
Disposal
Antifreeze (Engine Coolant)............... 321
Door Locks............................. 26
Door Locks, Automatic.................... 27
Door Opener, Garage..................... 145
Drive Belts............................ 309
DVD Player (Video Entertainment System)...... 214
Electric Remote Mirrors.................... 76
Electrical Outlet, Auxiliary (Power Outlet)...... 155
Electronic Brake Control System............. 131
Electronic Speed Control (Cruise Control)...... 128
Electronic Stability Program (ESP)............ 134
Electronic Throttle Control Warning Light...... 178
Electronic Vehicle Information Center (EVIC) . 176,179Emergency, In Case of
Freeing Vehicle When Stuck............... 241
Hazard Warning Flasher................. 292
Jump Starting......................... 293
Emission Control System Maintenance......302,350
Engine
Air Cleaner.......................... 310
Air Cleaner Filter...................... 310
Break-In Recommendations................ 64
Checking Oil Level..................... 305
Compartment......................... 300
Compartment Identification............... 300
Coolant (Antifreeze).................... 318
Cooling............................. 318
Exhaust Gas Caution..................65,273
Fails to Start.......................... 235
Flooded, Starting...................... 235
Fuel Requirements..................270,346
Oil ..............................305,346
INDEX 381
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