2013 JEEP GRAND CHEROKEE radiator

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.
Engine 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 or
rusty in appearance, the system should be drained,
flushed and refilled with fresh engine coolant (anti-
freeze). Check the front of the A/C condenser for anyaccumulation 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
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.
7
MAINTAINING YOUR VEHICLE 627

CAUTION!(Continued)
•Do not use water alone or alcohol-based 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 engine coolant (antifreeze).
Use of propylene glycol-based engine coolant (an-
tifreeze) is not recommended.
Adding Coolant
Your vehicle has been built with an improved engine
coolant (antifreeze) that allows extended maintenance
intervals. This engine coolant (antifreeze) can be used up
to ten years or 150,000 miles (240,000 km) before replace-
ment. To prevent reducing this extended maintenance
period, it is important that you use the same engine
coolant (antifreeze) throughout the life of your vehicle.Please review these recommendations for using Organic
Additive Technology (OAT) engine coolant (antifreeze).
When adding engine coolant (antifreeze):
•We recommend using MOPAR® Antifreeze/Coolant
10 Year/150,000 Mile Formula OAT (Organic Additive
Technology).
•Mix a minimum solution of 50% OAT engine coolant
and distilled water. 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 deion-
ized water when mixing the water/engine coolant
(antifreeze) solution. The use of lower quality water
will reduce the amount of corrosion protection in the
engine cooling system.7
MAINTAINING YOUR VEHICLE 629

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 engine coolant (antifreeze) types is not
recommended and can result in cooling system damage.
Drain, flush, and refill as soon as possible to avoid
damage if coolant types are mixed in an emergency.
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 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 precaution.
Never add engine coolant (antifreeze) 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.
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
630 MAINTAINING YOUR VEHICLE

rules for your community. To prevent ingestion by ani-
mals or children, do not store ethylene glycol-based
engine coolant 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 coolant. Adviseyour service attendant of this. As long as the engine oper-
ating 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/
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 engine
coolant (antifreeze) to enter the radiator.
7
MAINTAINING YOUR VEHICLE 631

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 expansion bottle.
•Check the coolant freeze point in the radiator and in
the coolant expansion bottle. If engine coolant (anti-
freeze) needs to be added, the contents of the coolant
expansion bottle must also be protected against
freezing.
•If frequent engine coolant (antifreeze) additions are
required, the cooling system should be pressure tested
for leaks.
•Maintain engine coolant (antifreeze) concentration at
50% OAT engine coolant (antifreeze) (minimum) and
distilled water for proper corrosion protection of your
engine which contains aluminum components.•Make sure that the coolant expansion bottle overflow
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.
•Do not change the thermostat for Summer or Winter
operation. If replacement is ever necessary, install
ONLY the correct type thermostat. Other designs may
result in unsatisfactory engine coolant (antifreeze)
performance, poor gas mileage, and increased
emissions.
Brake System
In order to assure brake system performance, all brake
system components should be inspected periodically.
Refer to the “Maintenance Schedule” for the proper
maintenance intervals.
632 MAINTAINING YOUR VEHICLE

Cavity Car-
tridge
FuseMini
FuseDescription
J13 60 Amp
YellowMain Ignition Off
Draw (IOD)
J14 20 Amp
BlueTrailer Tow
Lamps/Park Lamps
J15 40 Amp
GreenFront Cabin Fan/
Blower
J17 40 Amp
GreenStarter Motor
Solenoid
J18 20 Amp
BluePowertrain Control
Module/Powertrain
Control Module/
Transmission RangeCavity Car-
tridge
FuseMini
FuseDescription
J19 60 Amp
YellowRadiator Fan Motor
HI/Radiator Fan
Motor Low
J20 30 Amp
PinkFront Wiper
J21 20 Amp
BlueFront/Rear Washer
Control
J22 25 Amp
NaturalSunroof Module
M1 15 Amp
BlueStop Lamps
M2 20 Amp
YellowElectronic Limit
Slip Differential/
Air Suspension
7
MAINTAINING YOUR VEHICLE 647

Fluid and Filter Changes.................639
Fluid Change.........................639
Fluid Level Check......................636
Fluid Type...........................636
Special Additives.......................637
Autostick...............................455
Auxiliary Electrical Outlet (Power Outlet)........277
Auxiliary Power Outlet.....................277
Battery.................................617
Keyless Transmitter Replacement (RKE)........27
Belts, Seat...............................55
Blind Spot Monitoring......................127
Body Mechanism Lubrication.................621
B-Pillar Location..........................513
Brake Assist System.......................495
Brake Control System, Electronic..............494
Brake Fluid.............................633Brake System............................632
Anti-Lock (ABS).......................494
Fluid Check...........................633
Master Cylinder........................633
Parking..............................491
Warning Light.........................308
Brake/Transmission Interlock.................448
Bulb Replacement.........................652
Bulbs, Light.............................113
Calibration, Compass......................337
Camera, Rear............................255
Capacities, Fluid..........................659
Caps, Filler
Fuel................................550
Oil (Engine)..........................615
Power Steering........................490
Radiator (Coolant Pressure)...............630
Carbon Monoxide Warning..................110
10
INDEX 683

Cargo Area Cover.........................290
Cargo Area Features.......................287
Cargo Compartment.......................287
Light...............................288
Cargo Light.............................288
Cargo Tie-Downs.........................291
Car Washes.............................640
Cellular Phone...........................417
Center High Mounted Stop Light..............658
Certification Label.........................553
Chains, Tire.............................528
Chart, Tire Sizing.........................509
Check Engine Light (Malfunction Indicator Light) . .610
Checking Your Vehicle For Safety..............109
Checks, Safety...........................109
Child Restraint............................83
Child Safety Locks.........................36
Clean Air Gasoline........................542Cleaning
Wheels..............................642
Climate Control..........................418
Clock..................................348
Cold Weather Operation....................443
Compact Disc (CD) Maintenance..............417
Compact Spare Tire........................523
Compass...............................336
Compass Calibration.......................337
Compass Variance.........................336
Computer, Trip/Travel......................332
Connector
UCI ................................373
Universal Consumer Interface (UCI).........373
Conserving Fuel..........................330
Console, Overhead........................258
Contract, Service..........................675
Coolant Pressure Cap (Radiator Cap)...........630
684 INDEX