2008 JEEP LIBERTY spark plugs

MAINTAINING YOUR VEHICLE
CONTENTS
m3.7L Engine Compartment................398
mOnboard Diagnostic System Ð OBD II........399
NLoose Fuel Filler Cap Message............400
mEmissions Inspection And Maintenance
Programs............................400
mReplacement Parts......................402
mDealer Service.........................402
mMaintenance Procedures..................402
NEngine Oil..........................403NEngine Oil Filter......................405
NDrive Belts Ð Check Condition And Tension . . 406
NSpark Plugs.........................406
NEngine Air Cleaner Filter................406
NFuel Filter..........................407
NCatalytic Converter....................407
NCrankcase Emission Control System........409
NMaintenance-Free Battery................409
NAir Conditioner Maintenance.............411
7

Drive Belts Ð Check Condition and Tension
Belt tension is controlled by means of an automatic
tensioner. Therefore, no belt tension adjustments are
required. However, belt and belt tensioner condition
should be inspected periodically and replaced if re-
quired. Improper belt tension can cause belt slippage and
failure. Low generator belt tension can cause battery
failure.
Inspect belts for evidence of cuts, cracks, glazing, or
frayed cords and replaced if there is indication of dam-
age, which could result in belt failure. Also, check belt
routing to make sure there is no interference between the
belts and other engine components. See your authorized
dealer for service.
Spark Plugs
Spark plugs must fire properly to assure engine perfor-
mance and emission control. New plugs should be in-
stalled at the specified mileage. The entire set should be
replaced if there is any malfunction due to a faulty spark
plug. Malfunctioning spark plugs can damage the cata-
lytic converter. Refer to ªFluids, Lubricants, and Genuine
Partsº in this section for the proper type of spark plug for
use in your vehicle.
Engine Air Cleaner Filter
Refer to the ªMaintenance Scheduleº in Section 8 of this
manual for engine air cleaner filter maintenance inter-
vals.
NOTE:Be sure to follow the ªdusty or off-road condi-
tionsº maintenance interval if applicable.
406 MAINTAINING YOUR VEHICLE

FLUIDS, LUBRICANTS, AND GENUINE PARTS
Engine
Component Fluids, Lubricants, and Genuine Parts
Engine Coolant MopartAntifreeze/Coolant 5 Year/100,000 Mile Formula HOAT (Hybrid Or-
ganic Additive Technology) or equivalent.
Engine Oil Use API Certified SAE 5W-20 Engine Oil meeting the requirements of
DaimlerChrysler Material Standard MS-6395. Refer to the engine oil fill cap
for correct SAE grade.
Spark Plugs ZFR6F-11 (Gap.043 in [1.1 mm])
Oil Filter Mopart5281090 or equivalent.
Fuel Selection 87 Octane
448 MAINTAINING YOUR VEHICLE

Perform Maintenance Every(Where time and mileage
are listed, follow the interval that occurs first.)
Maintenance Items Miles Kilometers or Months
Inspect the front suspension, tie rod ends and boot
seals, and replace if necessary.24,000 40 000 24
Replace the engine air cleaner filter.30,000 50 000 30
Change the manual transmission fluid if using your
vehicle for any of the following: trailer towing, snow
plowing, heavy loading, taxi, police, delivery service
(commercial service), off-road, desert operation, or
more then 50% of your driving is at sustained high
speeds during hot weather, above 90ÉF (32ÉC).30,000 50 000 30
Inspect the transfer case fluid. 30,000 50 000 30
Replace the spark plugs.30,000 50 000 30
Change the automatic transmission fluid & filter if
using your vehicle for police, taxi, fleet, off-road, or
frequent trailer towing.60,000 100 000 60
456 MAINTENANCE SCHEDULES
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Side View Mirror Adjustment................ 89
Side Window Demisters (Defrosters).......... 271
Signals, Turn.................82,136,194,444,445
Sky Slider Power Roof.................164,434
Snow Chains (Tire Chains)................. 344
Sound Systems (Radio).................... 237
Spare Tire............................. 386
Spark Plugs.........................406,448
Specifications
Fuel (Gasoline)........................ 448
Oil ..............................404,448
Speed Control (Cruise Control).............. 147
Speedometer........................... 194
Starting.............................27,277
Automatic Transmission................. 277
Cold Weather......................... 278
Emergency (Jump Starting)............... 390
Engine Block Heater.................... 280
Engine Fails to Start.................... 278Manual Transmission................... 277
Remote.............................. 27
Starting and Operating.................... 277
Starting Procedures...................... 277
Steering
Power...........................313,412
Tilt Column.......................... 146
Wheel Lock........................... 18
Wheel, Tilt........................... 146
Steering Wheel Mounted Sound System
Controls.............................. 258
Storage............................... 173
Storage Bin............................ 173
Storage, Vehicle......................... 270
Sun Roof.............................. 161
Sun Roof (Sky Slider Power).............164,434
Sun Visor Extension....................... 92
Sunroof Maintenance..................... 164
Supplemental Restraint System - Airbag........ 52
488 INDEX

INTRODUCTION INTRODUCTION ROLLOVER WARNING HOW TO USE THIS MANUAL WARNINGS AND CAUTIONS VEHICLE IDENTIFICATION NUMBER VEHICLE MODIFICATIONS / ALTERATIONS THINGS TO KNOW BEFORE STARTING YOUR VEHICLE A
WORD ABOUT YOUR KEYS Ignition Key RemovalKey-In-Ignition ReminderSENTRY KEY Replacement KeysCustomer Key ProgrammingGeneral InformationSTEERING WHEEL LOCK - IF EQUIPPED To Manually Lock the Steering WheelTo Release the Steering Wheel
LockSECURITY ALARM SYSTEM - IF EQUIPPED Rearming of the SystemTo Arm the SystemTo Disarm the SystemILLUMINATED ENTRY SYSTEM REMOTE KEYLESS ENTRY To Unlock the Doors and LiftgateTo Lock the Doors and LiftgateTo Unlatch the Liftgate Flip-Up
WindowUsing the Panic AlarmProgramming Additional TransmittersBattery ReplacementGeneral InformationREMOTE STARTING SYSTEM - IF EQUIPPED HowTo Use Remote StartDOOR LOCKS Manual Door LocksPower Door LocksChild-Protection Door Lock System
(Rear Doors)WINDOWS Power WindowsWind BuffetingLIFTGATE OCCUPANT RESTRAINTS Lap/Shoulder BeltsLap/Shoulder Belt Untwisting ProcedureSeat Belt PretensionersEnhanced Seat Belt Use Reminder System (BeltAlert)Automatic Locking Mode - If Equipped
Energy Management FeatureSeat Belts and Pregnant WomenSeat Belt ExtenderDriver and Front Passenger Supplemental Restraint System (SRS) - AirbagChild RestraintENGINE BREAK-IN RECOMMENDATIONS SAFETY TIPS Transporting PassengersLock Your Vehicle
Exhaust GasSafety Checks You Should Make Inside The VehiclePeriodic Safety Checks You Should Make Outside The VehicleUNDERSTANDING THE FEATURES OFYOUR VEHICLE MIRRORS Inside Day/Night MirrorAutomatic Dimming Mirror - If EquippedOutside
MirrorsExterior Mirrors Folding Feature - If EquippedPower Remote Control MirrorsHeated Remote Control Mirrors - If EquippedIlluminated Vanity Mirrors - If EquippedHANDS-FREE COMMUNICATION (UConnect) - IF EQUIPPED OperationPhone Call FeaturesUConnect
System FeaturesAdvanced Phone ConnectivityThings You Should Know About Your UConnect SystemGeneral InformationSEATS Manual Front Seat AdjustmentsPower Seat - If EquippedHead RestraintsHeated Seats - If Equipped60/40 Split Folding Rear Seat with Fold
Flat FeatureDRIVER MEMORY SEAT - IF EQUIPPED Programming The Memory FeatureLinking and Unlinking the Remote Keyless (RKE) Transmitter to the MemoryFeatureMemory Position RecallEasy Entry/Exit Seat (Available with Memory Seat Only)TO OPEN AND
CLOSE THE HOOD LIGHTS Exterior and Interior Lighting ControlHeadlights and Parking LightsAutomatic Headlights - If EquippedHeadlights with Wipers (Available with Auto Headlights Only)Headlight Time Delay - If EquippedDaytime Running Lights (DRL) - If Equipped
Lights-On ReminderFog Lights - If EquippedTurn SignalsHighbeam/Lowbeam Select SwitchFlash to PassInterior LightsWINDSHIELD WIPERS AND WASHERSIntermittent Wiper SystemMist FeatureHeadlights with Wipers (Available with Auto Headlights Only)Rain Sensing
Wipers - If EquippedWindshield WashersAdding Washer FluidTILT STEERING COLUMN ELECTRONIC SPEED CONTROL - IF EQUIPPED Electronic Speed Control OperationTo ActivateTo Set At A Desired SpeedTo DeactivateTo Resume SpeedTo Vary The Speed Setting
To Accelerate For PassingREAR PARK ASSIST SYSTEM - IF EQUIPPED System Usage PrecautionsEnabling and Disabling the SystemSystem OperationGARAGE DOOR OPENER - IF EQUIPPED Programming HomeLinkGate Operator/Canadian ProgrammingUsing
HomeLinkReprogramming a Single HomeLink ButtonSecurityTroubleshooting TipsGeneral InformationPOWER SUNROOF - IF EQUIPPED Opening Sunroof - ExpressClosing Sunroof - ExpressPinch Protect FeaturePinch Protect OverrideVenting Sunroof - ExpressSunshade
OperationWind BuffetingSunroof MaintenanceIgnition Off OperationSKY SLIDER FULL LENGTH OPEN ROOF Sky Slider Usage PrecautionsPower Top ControlOpening the Sky SliderClosing the Sky SliderAnti-Pinch Protect FeatureWind BuffetingSky Slider Maintenance
ELECTRICAL POWER OUTLET Electrical Outlet Use With Engine OffPOWER INVERTER - If EQUIPPED CUP HOLDERS STORAGE Front Storage CompartmentConsole Storage CompartmentCARGO AREA FEATURES Cargo Load FloorREAR WINDOW FEATURES
Rear Window Wiper/Washer - If EquippedRear Window Defroster - If EquippedROOF LUGGAGE RACK - IF EQUIPPED INSTRUMENT PANEL AND CONTROLS INSTRUMENT PANEL FEATURES INSTRUMENT CLUSTER INSTRUMENT CLUSTER DESCRIPTIONS
ELECTRONIC VEHICLE INFORMATION CENTER (EVIC) - IF EQUIPPED Electronic Vehicle Information Center (EVIC) DisplaysOil Change RequiredTrip FunctionsCompass DisplayTelephone (UConnect) - If EquippedPersonal Settings (Customer Programmable Features)
RADIO GENERAL INFORMATION Radio Broadcast SignalsTwo Types of SignalsElectrical DisturbancesAM ReceptionFM ReceptionSALES CODE REQ - AM/FM STEREO RADIO AND 6-DISC CD/DVD CHANGER (MP3/WMA AUX JACK) Operating Instructions - Radio
ModeOperation Instructions - (DISC MODE for CD and MP3/WMA Audio Play, DVD-VIDEO)Notes On Playing MP3/WMA FilesLIST Button (DISC Mode for MP3/WMA Play)INFO Button (DISC Mode for MP3/WMA Play)SALES CODE RER - MULTIMEDIA SYSTEM - IF
EQUIPPED Operating Instructions - Satellite RadioOperating Instructions - Hands-Free Communication (UConnect) (If Equipped)Clock Setting ProcedureSALES CODE RES - AM/FM STEREO RADIO WITH CD PLAYER (MP3 AUX JACK) Operating Instructions - Radio
ModeOperation Instructions - CD MODE for CD and MP3 Audio PlayNotes On Playing MP3 FilesLIST Button (CD Mode for MP3 Play)INFO Button (CD Mode for MP3 Play)SATELLITE RADIO (RSC) - IF EQUIPPED (RER/REQ/REN RADIOS ONLY) System Activation
Electronic Serial Number/Sirius Identification Number (ENS/SID)Selecting Satellite ModeSatellite AntennaReception QualityOperating Instructions - Satellite ModeOperating Instructions - Hands Free Phone (If Equipped)Operating Instructions - Video Entertainment System
(VES) (If Equipped)REMOTE SOUND SYSTEM CONTROLS - IF EQUIPPED Right-Hand Switch FunctionsLeft-Hand Switch Functions for Radio OperationLeft-Hand Switch Functions for Media (i.e. CD) OperationCD/DVD DISC MAINTENANCE CLIMATE CONTROLS
Manual Air Conditioning and Heating System Automatic Temperature Control (ATC) - If Equipped Operating TipsSTARTING AND OPERATING STARTING PROCEDURES Automatic TransmissionManual Transmission - If EquippedNormal StartingExtreme Cold Weather
(below -20 degrees F or -29 degrees C)If Engine Fails to StartAfter StartingENGINE BLOCK HEATER - IF EQUIPPED AUTOMATIC TRANSMISSION Shift Lock Manual Override - If EquippedBrake/Transmission Interlock System4-Speed Automatic TransmissionMANUAL
TRANSMISSION - IF EQUIPPED Clutch Interlocking Ignition System6-Speed Manual TransmissionFOUR-WHEEL DRIVE OPERATION MP1522 Command-Trac Transfer Case - If EquippedMP3022 Selec-Trac II Transfer Case - If EquippedON-ROAD DRIVING TIPS
OFF-ROAD DRIVING TIPS When To Use 4WD Low RangeDriving Through WaterDriving In Snow, Mud and SandHill ClimbingTraction DownhillAfter Driving Off-RoadPARKING BRAKE ANTI-LOCK BRAKE SYSTEM POWER STEERING ELECTRONIC BRAKE CONTROL
SYSTEM ABS (Anti-Lock Brake System)TCS (Traction Control System)BAS (Brake Assist System)ERM (Electronic Roll Mitigation)TSC (Trailer Sway Control) - If EquippedHSA (Hill Start Assist)HDC (Hill Descent Control) - If EquippedESP (Electronic Stability Program)
ESP/BAS Warning Light and ESP/TCS Indicator LightTIRE SAFETY INFORMATION Tire Markings Tire Identification Number (TIN)Tire Loading and Tire PressureTIRES - GENERAL INFORMATION Tire PressureTire Inflation PressuresTire Pressures for High Speed
OperationRadial-Ply TiresTire SpinningTread Wear IndicatorsLife of TireReplacement TiresAlignment and BalanceTIRE CHAINS TIRE ROTATION RECOMMENDATIONS TIRE PRESSURE MONITOR SYSTEM (TPMS) - IF EQUIPPED Base System - If EquippedPremium
System - If EquippedGeneral InformationFUEL REQUIREMENTS Reformulated GasolineGasoline/Oxygenate BlendsMMT In GasolineMaterials Added to FuelFuel System CautionsCarbon Monoxide WarningsADDING FUEL Fuel Filler Cap (Gas Cap)Loose Fuel Filler Cap
MessageVEHICLE LOADING Certification LabelTRAILER TOWING Common Towing DefinitionsTrailer Hitch ClassificationTrailer Towing Weights (Maximum Trailer Weight Ratings)Trailer and Tongue WeightTowing RequirementsTowing TipsRECREATIONAL TOWING
(BEHIND MOTORHOME, ETC.) Towing - 2WD ModelsTowing - 4WD ModelsWHAT TO DO IN EMERGENCIES IF YOUR ENGINE OVERHEATS JACKING AND TIRE CHANGING Jack LocationSpare Tire StowageSpare Tire RemovalPreparations For JackingJacking
InstructionsJUMP STARTING TOWING A DISABLED VEHICLE MAINTAINING YOUR VEHICLE 3.7L ENGINE COMPARTMENT ONBOARD DIAGNOSTIC SYSTEM - OBD II Loose FuelFiller Cap MessageEMISSIONS INSPECTION AND MAINTENANCE PROGRAMS
REPLACEMENT PARTS DEALER SERVICE MAINTENANCE PROCEDURES Engine OilEngine Oil FilterDrive Belts - Check Condition and TensionSpark PlugsEngine Air Cleaner FilterFuel FilterCatalytic ConverterCrankcase Emission Control SystemMaintenance-Free
BatteryAir Conditioner MaintenanceA/C Air Filter - If EquippedPower Steering - Fluid CheckDriveline and Steering Component LubricationBody LubricationWindshield Wiper BladesWindshield and Rear Window WashersExhaust SystemCooling SystemHoses and
Vacuum/Vapor HarnessesFuel SystemBrake SystemClutch Hydraulic System - Manual Transmission (If Equipped)Automatic TransmissionManual Transmission - If EquippedTransfer CaseFront/Rear Axle FluidAppearance Care And Protection From CorrosionSKY SLIDER
TOP CARE WashingGeneral CleaningAdditional Cleaning ProcedureProtectionWeather Strip CareFUSES (INTEGRATED POWER MODULE) REPLACEMENT LIGHT BULBS BULB REPLACEMENT HeadlightFront Turn Signal and Front Side Marker LightsFront Fog Light
Rear Tail/Stop, Turn Signal, and Back-Up LightsFLUID CAPACITIES FLUIDS, LUBRICANTS, AND GENUINE PARTS EngineChassisMAINTENANCE SCHEDULES EMISSION CONTROL SYSTEM MAINTENANCE MAINTENANCE SCHEDULE Required Maintenance
IntervalsIF YOU NEED CONSUMER ASSISTANCE SUGGESTIONS FOR OBTAINING SERVICE FOR YOUR VEHICLE Prepare For The AppointmentPrepare A ListBe Reasonable With RequestsIF YOU NEED ASSISTANCE WARRANTY INFORMATION (U.S. Vehicles
Only) MOPAR PARTS REPORTING SAFETY DEFECTS In CanadaPUBLICATION ORDER FORMS DEPARTMENT OF TRANSPORTATION UNIFORM TIRE QUALITY GRADES TreadwearTraction GradesTemperature GradesINDEX