radiator cap JEEP GRAND CHEROKEE 2007 WK / 3.G Owners Manual

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, refer
to Exhaust Gas in the Safety Tips section of this
manual.
Cooling System
WARNING!
You or others can be badly burned by hot antifreeze/
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 or coolant bottle is hot.
Engine Coolant Checks
Check antifreeze/coolant protection every 12 months
(before the onset of freezing weather, where applicable).
If antifreeze/coolant is dirty or rusty in appearance, the
system should be drained, flushed and refilled with fresh
antifreeze/coolant. Check the front of the A/C condenser
376 MAINTAINING YOUR VEHICLE

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 engine cooling system hoses for brittle rubber,
cracking, tears, cuts, and tightness of the connection at
the coolant recovery 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 antifreeze/coolant will begin to drain from
the coolant recovery bottle. DO NOT REMOVE THE
COOLANT PRESSURE CAP WHEN THE COOLING
SYSTEM IS HOT.Cooling System — Drain, Flush, And Refill
At the intervals shown in the appropriate “Maintenance
Schedule,” the system should be drained, flushed, and
refilled.
If the solution is dirty and contains a considerable
amount of sediment, clean and flush with reliable cooling
system cleaner. Follow with a thorough rinsing to remove
all deposits and chemicals. Properly dispose of old
antifreeze/coolant solution.
Selection Of Coolant
Use only the manufacturer’s recommended antifreeze/
coolant, refer to Fluids, Lubricants, and Genuine Parts for
correct antifreeze/coolant type.
MAINTAINING YOUR VEHICLE 377
7

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

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 and
children, 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.
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.
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.
380 MAINTAINING YOUR VEHICLE

Autostick............................. 256
Auxiliary Electrical Outlet (Power Outlet)...... 156
Auxiliary Power Outlet................... 156
Battery............................... 370
Emergency Starting..................... 346
Keyless Transmitter Replacement (RKE)....... 23
Saving Feature (Protection)............... 113
Belts,Drive ............................ 366
Belts, Seat.............................. 35
Body Mechanism Lubrication............... 374
B-Pillar Location........................ 283
Brake Assist System...................... 131
Brake Control System, Electronic............. 129
Brake Fluid............................ 384
Brake System........................... 382
Anti-Lock (ABS)....................129,274
Fluid Check.......................... 384
Hoses.............................. 383Master Cylinder....................... 384
Parking............................. 272
Warning Light........................ 175
Brake/Transmission Interlock............... 254
Break-In Recommendations, New Vehicle........ 64
Bulb Replacement.....................401,402
Camera, Rear........................... 144
Capacities, Fluid........................ 407
Caps, Filler
Fuel................................ 313
Radiator (Coolant Pressure)............... 379
Car Washes............................ 390
Carbon Monoxide Warning............ 65,147,309
Cargo Area Cover....................... 160
Cargo Area Features...................... 159
Cargo Compartment...................... 159
Light ............................... 159
Luggage Carrier....................... 166
INDEX 453
10

CargoLight ............................ 159
Cargo Load Floor........................ 163
Cargo Tie-Downs........................ 161
Catalytic Converter...................... 368
Caution, Exhaust Gas..................... 147
CD (Compact Disc) Player...............199,213
Cellular Phone.......................... 77
Center High Mounted Stop Light............ 406
Certification Label....................... 316
Chains, Tire............................ 294
Changing A Flat Tire..................... 339
Chart, Tire Sizing........................ 280
Checks, Safety......................... 65,66
Child Restraint...................... 54,60,62
Child Restraint Tether Anchors............. 58,60
Child Safety Locks........................ 28
Climate Control......................... 233
Clock ...........................201,215,221
Compact Disc (CD) Maintenance............. 232Compass.............................. 191
Compass Variance....................... 196
Computer, Trip/Travel.................... 191
Console, Overhead....................... 145
Contract, Service........................ 446
Converter, Catalytic...................... 368
Cooling System......................... 376
Adding Coolant (Antifreeze).............. 378
Coolant Capacity...................... 407
Coolant Level......................... 380
Disposal of Used Coolant................ 380
Drain, Flush, and Refill.................. 377
Inspection........................... 376
Points to Remember.................... 380
Pressure Cap......................... 379
Radiator Cap......................... 379
Selection of Coolant (Antifreeze).........377,407
Crankcase Emission Control System.......... 369
Cruise Control (Speed Control).............. 126
454 INDEX