2006 JEEP WRANGLER cooling

CAUTION!
•Mixing of antifreeze/coolant other than the speci-
fied HOAT antifreeze/coolant may result in de-
creased corrosion protection and engine damage.
If a non-HOAT antifreeze/coolant is introduced
into the cooling system in an emergency, it should
be replaced with the specified antifreeze/coolant
as soon as possible.
•Do not use plain water alone or alcohol base
antifreeze/coolant products. Do not use additional
rust inhibitors or antirust products, as they may
not be compatible with the antifreeze/coolant and
may plug the radiator.
•This vehicle has not been designed for use with
Propylene Glycol based antifreeze/coolant. Use of
Propylene Glycol base antifreeze/coolant is not
recommended.
Adding Engine Coolant
Your vehicle has been built with an improved antifreeze/
coolant that allows extended maintenance intervals. This
antifreeze/coolant can be used up to 5 Years or 100,000
miles before replacement. To prevent reducing this ex-
tended maintenance period, it is important that you use
the same antifreeze/coolant throughout the life of your
vehicle. Please review these recommendations for using
Hybrid Organic Additive Technology (HOAT)
antifreeze/coolant.
When adding antifreeze/coolant, a minimum solution of
50% recommended Mopar Antifreeze/ Coolant 5 Year/
100,000 Mile Formula HOAT (Hybrid Organic Additive
Technology), or equivalent, in water should be used. Use
higher concentrations (not to exceed 70%) if temperatures
below -34°F (-37°C) are anticipated.
286 MAINTAINING YOUR VEHICLE

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 reserve 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 antifreeze/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.
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 or
MAINTAINING YOUR VEHICLE 287
7

•Check antifreeze/coolant freeze point in the radiator
and in the coolant recovery bottle. If antifreeze/
coolant needs to be added, contents of coolant recov-
ery bottle must also be protected against freezing.
•If frequent antifreeze/coolant additions are required,
or if the level in the recovery bottle does not drop
when the engine cools, the cooling system should be
pressure tested for leaks.
•Maintain antifreeze/coolant concentration at 50%
HOAT antifreeze/coolant (minimum) and distilled
water for proper corrosion protection of your engine
which contains aluminum components.
•Make sure that the radiator and coolant recovery
bottle 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, also.
•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 cooling 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 the hoses nearest to high heat
sources such as the exhaust manifold. Inspect hose rout-
ing to be sure hoses do not touch any heat source or
moving component that may cause heat damage or
mechanical wear.
Insure nylon tubing in these areas has not melted or
collapsed. Inspect all hose connections such as clamps
and couplings to make sure they are secure and no leaks
MAINTAINING YOUR VEHICLE 289
7

FLUID CAPACITIES
U.S. Metric
Fuel (Approximate) 19 Gallons 71.9 Liters
Engine Oil with Filter
2.4 Liter Engine (SAE 5W-30, API Certified Engine Oil) 5 Qts 4.7 Liters
4.0 Liter Engine (SAE 10W-30, API Certified Engine Oil) 6 Qts 5.7 Liters
Cooling System *
2.4 Liter Engine (Mopar  Antifreeze/Engine Coolant 5 Year/
100,000 Mile Formula) 9 Qts 8.5 Liters
4.0 Liter Engine (Mopar  Antifreeze/Engine Coolant 5 Year/
100,000 Mile Formula) 10.5 Qts 9.9 Liters
* Includes heater and coolant recovery bottle filled to MAX level.
314 MAINTAINING YOUR VEHICLE

Child Restraint Tether Anchors.............38,39
Climate Control ......................... 172
Clock ................................ 152
Clutch Interlocking Ignition System ........182,187
Compact Disc (CD) Maintenance ............. 171
Compass .............................. 52
Compass Calibration ...................... 54
Compass Variance ........................ 55
Console ............................... 74
Console, Floor ........................... 74
Contract, Service ........................ 342
Converter, Catalytic ...................... 275
Cooling System ......................... 284
Adding Coolant (Antifreeze) .............. 286
Coolant Capacity ...................... 314
Coolant Level ......................... 288
Disposal of Used Coolant ................ 287
Drain, Flush, and Refill .................. 285
Inspection ........................... 284 Points to Remember
.................... 288
Pressure Cap ......................... 287
Selection of Coolant (Antifreeze) .........285,314
Temperature Gauge ..................... 149
Corrosion Protection ..................... 297
Crankcase Emission Control System .......... 277
Cruise Control (Speed Control) ............... 69
Cruise Light ........................... 147
Cup Holder ............................ 72
Customer Assistance ..................... 340
Daytime Running Lights ................... 66
Dealer Service .......................... 270
Defroster, Rear Window ................... 139
Defroster, Windshield .................. 174,177
Delay (Intermittent) Wipers ................. 67
Deploying, Airbag ........................ 32
Diagnostic System, Onboard ................ 268
Dimmer Switch, Headlight .................. 65
350 INDEX

Tongue Weight/Trailer Weight.............. 240
Torque Converter Clutch .................. 194
Towing ............................ 236,261
Disabled Vehicle ....................... 261
Guide .............................. 239
Recreational .......................... 248
Weight .............................. 239
Trac-Lok Rear Axle ...................... 198
Trailer Towing .......................... 236
Cooling System Tips .................... 248
Hitches .......................... 229,238
Minimum Requirements ................. 242
Trailer and Tongue Weight ................ 240
Wiring .............................. 245
Trailer Towing Guide ..................... 239
Trailer Weight .......................... 239
Transfer Case ........................... 295
Four-Wheel-Drive Operation .............. 195
Maintenance .......................... 295 Transmission
Automatic ........................... 188
Maintenance ....................... 292,294
Manual ............................. 185
Shifting ............................. 185
Transporting Pets ........................ 44
Tread Wear Indicators .................... 225
Trip Odometer .......................... 150
Trip Odometer Reset Button ................ 150
Turn Signals .................... 66,147,311,313
Underhood Fuses ........................ 307
Uniform Tire Quality Grades ................ 345
Upholstery Care ........................ 300
Vacuum/Vapor Harnesses ................. 289
Variance, Compass ....................... 55
Vehicle Identification Number (VIN) ............ 8
Vehicle Loading ......................... 218
INDEX 361
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