2010 JEEP GRAND CHEROKEE radiator cap

CAUTION!
Driving with a hot cooling system could damage
your vehicle. If the temperature gauge reads HOT
(H), 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 HOT (H), and you hear continuous
chimes, turn the engine off immediately and call for
service.
NOTE: There are steps that you can take to slow down
an impending overheat condition:
•If your air conditioner (A/C) is on, turn it off. The A/C
system adds heat to the engine cooling system and
turning the A/C off can help remove this heat.
•You can also turn the temperature control to maximum
heat, the mode control to floor and the blower 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.
WARNING!
You or others can be badly burned by hot engine
coolant (antifreeze) or steam from your radiator. If
you see or hear steam coming from under the hood,
do not 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.
6
WHAT TO DO IN EMERGENCIES 303

Cooling System
WARNING!
•When 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.
•You or others can be badly burned by hot engine
coolant (antifreeze) or steam from your radiator. If
you see or hear steam coming from under the
hood, do not 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 the engine coolant (antifreeze) protection every
12 months (before the onset of freezing weather, where
applicable). If the engine coolant (antifreeze) is dirty orrusty 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
engine coolant (antifreeze) from the radiator drain cock.
If the cap is sealing properly, the engine coolant (anti-
freeze) will begin to drain from the coolant recovery
bottle. DO NOT REMOVE THE COOLANT PRESSURE
CAP WHEN THE COOLING SYSTEM IS HOT.
328 MAINTAINING YOUR VEHICLE

NOTE:Mixing engine coolant (antifreeze) types will
decrease the life of the engine coolant (antifreeze) and
will require more frequent engine coolant (antifreeze)
changes.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of engine
coolant (antifreeze), and to ensure that engine coolant
(antifreeze) 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!
•The warning words “DO NOT OPEN HOT” on
the cooling system pressure cap are a safety pre-
caution. Never add engine coolant (antifreeze)
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.
•Do not use a pressure cap other than the one
specified for your vehicle. Personal injury or en-
gine damage may result.
7
MAINTAINING YOUR VEHICLE 331

Disposal of Used Engine Coolant
Used ethylene glycol based engine coolant (antifreeze) is
a regulated substance requiring proper disposal. Check
with your local authorities to determine the disposal
rules for your community. To prevent ingestion by ani-
mals or children, do not store ethylene glycol based
engine coolant (antifreeze) in open containers or allow it
to remain in puddles on the ground. If ingested by a child
or pet, seek emergency assistance immediately. Clean up
any ground spills immediately.
Coolant Level
The coolant bottle provides a quick visual method for
determining that the coolant level is adequate. With the
engine off and cold, the level of the engine coolant
(antifreeze) in the bottle should be between the ranges
indicated on the bottle.The radiator normally remains completely full, so there is
no need to remove the radiator cap unless checking for
engine coolant (antifreeze) freeze point or replacing en-
gine coolant (antifreeze). 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 engine coolant (antifreeze) is needed to
maintain 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 (a
few kilometers) of operation, you may observe vapor
coming from the front of the engine compartment. This is
normally a result of moisture from rain, snow, or high
humidity accumulating on the radiator and being vapor-
ized when the thermostat opens, allowing hot engine
coolant (antifreeze) to enter the radiator.
332 MAINTAINING YOUR VEHICLE

Keyless Transmitter Replacement (RKE)....... 22
Saving Feature (Protection) ............... 104
Belts, Seat ............................ 36,72
Body Mechanism Lubrication ............... 323
B-Pillar Location ........................ 268
Brake Assist System ...................... 256
Brake Control System, Electronic ............. 255
Brake System ........................... 334
Anti-Lock (ABS) .................... 252,255
Fluid Check .......................... 334
Master Cylinder ....................... 334
Parking ............................. 250
Warning Light ........................ 156
Brake/Transmission Interlock ............... 241
Break-In Recommendations, New Vehicle ........ 70
Bulb Replacement ....................... 349
Bulbs, Light ............................ 73
Calibration, Compass ..................... 177 Camera, Rear
........................... 125
Capacities, Fluid ........................ 355
Caps, Filler Fuel ............................... 287
Power Steering ........................ 249
Radiator (Coolant Pressure) ............... 331
Car Washes ............................ 337
Carbon Monoxide Warning ...............71,286
Cargo Area Cover ....................... 144
Cargo Area Features ...................... 143
Cargo Compartment ...................... 143
Light ............................... 143
Cargo Light ............................ 143
Cargo Load Floor ........................ 147
Cargo Tie-Downs ........................ 146
Cellular Phone ........................ 83,225
Center High Mounted Stop Light ............ 354
Chart, Tire Sizing ........................ 264
10
INDEX 389

Check Engine Light
(Malfunction Indicator Light)............... 315
Checking Your Vehicle For Safety ............. 71
Checks, Safety ........................... 71
Child Restraint .................... 60,61,66,68
Child Restraint Tether Anchors .............65,66
Child Safety Locks ........................ 28
Clean Air Gasoline ....................... 283
Climate Control ......................... 225
Clock ........................ 185,187,190,199
Cold Weather Operation ................... 239
Compact Disc (CD) Maintenance ............. 224
Compass .............................. 177
Compass Calibration ..................... 177
Compass Variance ....................... 178
Computer, Trip/Travel .................... 171
Connector UCI ................................ 210
Universal Consumer Interface (UCI) ......... 210Console, Overhead
....................... 127
Contract, Service ........................ 381
Coolant Pressure Cap (Radiator Cap) .......... 331
Cooling System ......................... 328
Adding Coolant (Antifreeze) .............. 330
Coolant Capacity ...................... 355
Coolant Level ...................... 328,332
Disposal of Used Coolant ................ 332
Drain, Flush, and Refill .................. 329
Inspection ........................... 332
Points to Remember .................... 332
Pressure Cap ......................... 331
Radiator Cap ......................... 331
Selection of Coolant (Antifreeze) .........329,355
Cruise Light ........................... 164
Cupholders ............................ 143
Customer Assistance ..................... 379
Daytime Running Lights ................... 103
390 INDEX

Phone, Cellular.......................... 83
Phone, Hands-Free (Uconnect™) .............. 83
Placard, Tire and Loading Information ......... 268
Polishing and Waxing ..................... 337
Power Distribution Center (Fuses) ............... 343
Door Locks ........................... 27
Inverter ............................. 140
Mirrors .............................. 82
Outlet (Auxiliary Electrical Outlet) .......... 137
Seats .............................. 85,86
Steering .......................... 248,249
Sunroof ............................. 135
Windows ............................. 29
Pregnant Women and Seat Belts .............. 44
Pretensioners Seat Belts ............................ 43
Programmable Electronic Features ............ 179Programming Transmitters
(Remote Keyless Entry)
.................... 19
Radial Ply Tires ......................... 275
Radiator Cap (Coolant Pressure Cap) .......... 331
Radio Operation ........................ 225
Radio, Satellite (Uconnect studios)........... 215
Rain Sensitive Wiper System ................ 112
Rear Camera ........................... 125
Rear Cupholder ......................... 143
Rear Heated Seats ........................ 90
Rear Park Sense System ................... 119
Rear Seat, Folding ........................ 91
Rear Window Defroster ................... 149
Rear Window Features .................... 148
Rear Wiper/Washer ...................... 148
Reclining Front Seats ...................... 84
Recreational Towing ...................... 299
Reformulated Gasoline .................... 283
10
INDEX 399