2008 JEEP GRAND CHEROKEE radiator cap

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
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
324 MAINTAINING YOUR VEHICLE

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.
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 coolant
is introduced into the cooling system in an emer-
gency, it should be replaced with the specified cool-
ant 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.
MAINTAINING YOUR VEHICLE 325
7

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 (160
000 km) before replacement. To prevent reducing this
extended maintenance period, it is important that you
use the same coolant throughout the life of your vehicle.
Please review these recommendations for using Hybrid
Organic Additive Technology (HOAT) coolant.
When adding coolant:
²The manufacturer recommends using Mopart
Antifreeze/ Coolant 5 Year/100,000 Mile Formula
HOAT (Hybrid Organic Additive Technology)
²Mix a minimum solution of 50% HOAT engine coolant
and distilled water. Use higher concentrations (not to
exceed 70%) if temperatures below234ÉF (237ÉC ) are
anticipated.
²Use only high purity water such as distilled or deion-
ized water when mixing the water/engine coolant
solution. 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.
326 MAINTAINING YOUR VEHICLE

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 scald-
ing 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 en-
gine 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
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, contact a physician
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 coolant 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
coolant freeze point or replacing coolant. Advise your
MAINTAINING YOUR VEHICLE 327
7

Battery............................... 318
Emergency Starting..................... 300
Keyless Transmitter Replacement (RKE)....... 23
Saving Feature (Protection)............... 119
Bearings.............................. 333
Belts, Drive............................ 315
Belts, Seat.............................. 36
Body Mechanism Lubrication............... 321
B-Pillar Location........................ 263
Brake Assist System...................... 136
Brake Control System, Electronic............. 134
Brake System........................... 329
Anti-Lock (ABS)....................134,254
Fluid Check.......................... 331
Hoses.............................. 330
Parking............................. 253
Warning Light........................ 174
Brake/Transmission Interlock............... 247
Break-In Recommendations, New Vehicle........ 66Bulb Replacement.....................346,347
Calibration, Compass..................... 188
Camera, Rear........................... 146
Capacities, Fluid........................ 352
Caps, Filler
Fuel................................ 282
Radiator (Coolant Pressure)............... 326
Car Washes............................ 334
Carbon Monoxide Warning...............66,281
Cargo Area Cover....................... 163
Cargo Area Features...................... 162
Cargo Compartment...................... 162
Light............................... 162
Cargo Light............................ 162
Cargo Load Floor........................ 166
Cargo Tie-Downs........................ 164
Catalytic Converter...................... 317
CD (Compact Disc) Player................. 212
INDEX 387
10

Cellular Phone.......................... 77
Center High Mounted Stop Light............ 351
Chart, Tire Sizing........................ 260
Checks, Safety.........................67,68
Child Restraint....................56,57,61,63
Child Restraint Tether Anchors.............60,61
Child Safety Locks........................ 28
Clean Air Gasoline....................... 279
Climate Control......................... 229
Clock...........................198,213,215
Cold Weather Operation................... 243
Compact Disc (CD) Maintenance............. 228
Compass.............................. 188
Compass Calibration..................... 188
Compass Variance....................... 189
Computer, Trip/Travel.................... 186
Connector
UCI ................................ 217
Universal Consumer Interface (UCI)......... 217Console, Overhead....................... 147
Contract, Service........................ 378
Coolant Pressure Cap (Radiator Cap).......... 326
Cooling System......................... 324
Adding Coolant (Antifreeze).............. 326
Coolant Capacity...................... 352
Coolant Level......................324,327
Disposal of Used Coolant................ 327
Drain, Flush, and Refill.................. 325
Inspection........................... 327
Points to Remember.................... 328
Pressure Cap......................... 326
Radiator Cap......................... 326
Selection of Coolant (Antifreeze).........325,352
Cruise Light........................... 180
Cup Holder............................ 161
Customer Assistance..................... 376
Data Recorder, Event...................... 54
388 INDEX

Pets.................................. 65
Pets, Transporting........................ 65
Phone, Cellular.......................... 77
Phone, Hands-Free (UConnectŸ)............. 77
Placard, Tire and Loading Information......... 263
Polishing and Waxing..................... 334
Port
Universal Serial Bus (USB)................ 212
USB ................................ 212
Power
Distribution Center (Fuses)............... 341
Door Locks........................... 27
Inverter............................. 159
Mirrors.............................. 76
Outlet (Auxiliary Electrical Outlet).......... 158
Seats............................106,107
Steering..........................258,320
Sunroof............................. 155
Windows............................. 29Pregnant Women and Seat Belts.............. 44
Pretensioners
Seat Belts............................. 42
Programmable Electronic Features............ 190
Programming Transmitters (Remote Keyless
Entry)................................. 19
Radial Ply Tires......................... 271
Radiator Cap (Coolant Pressure Cap).......... 326
Radio Broadcast Signals................... 195
Radio, Navigation....................... 215
Radio Operation......................213,229
Radio, Satellite.................212,213,215,221
Radio (Sound Systems).................... 212
Rain Sensitive Wiper System................ 128
Rear Camera........................... 146
Rear Cup Holder........................ 161
Rear Heated Seats....................... 109
Rear Park Sense System................... 142
INDEX 397
10