2003 PORSCHE 911 CARRERA tire pressure

Wheelalignment,wheelbalancing

Alsoreferto"Four-Wheeldrive".
Asaprecaution,havewheelswithsummertires
balancedinthespring,andthosewithmudand
snowtiresbeforewinter.
Unbalancedwheelsmayaffectcarhandlingand
tirelife.
Onlythespecifiedweightsmaybeusedfor
wheelbalancing.
Self-adhesiveweightsmustnotcomeintocon-
tactwithcleaningagents,sincetheycoulddrop
off.
Awheelshouldalwaysbebalancedafteratire
repair.
Uneventreadwearindicateswheelimbalance.In
thisevent,thevehicleshouldbecheckedatan
authorizedPorschedealer.
/!\.Warning!
If,duringajourney,unevenrunningorvi-
brationsoccurthatcouldbecausedby
damagetotiresorthecar,thespeedmust
bereducedimmediately,butwithoutbrak-
ingsharply.
Ifyoucontinueyourtripwithouthavingthe
causeofthefaultremedied,youmightlose
controlofyourvehiclewhichcouldcause
severepersonalinjury.
I>Stopthevehicleandcheckthetires.
202PracticalTips,EmergencyService
I>Ifnocauseforthefaultcanbefound,drive
carefullytothenearestauthorizedPorsche
dealer.

Removingandstoringtires

I>Afterchanging,adjusttirepressureand
torquewheelboltsdiagonallyto94ftlb
(130

Nm).
See"Changingwheels".

Tiresmustalwaysremainonthesameside
ofthevehicle.

Whenwheelsareremoved,thedirectionofrota-
tionandpositionofeachwheelshouldbe
marked.
Example
FR(frontright),FL,RRandRL.
Wheelsmustalwaysbefittedinaccordancewith
theirmarking.
Thepreceptionthattiredurabilityandperfor-
manceareimmunetotheeffectsofstorageand
ageisunfounded.
Chemicaladditives,whichmaketherubberelastic,
losetheireffectivenessinthecourseoftimeand
therubberbecomesbrittleandcracks.

Therefore,thetires,especiallythespare
tire,shouldbeinspectedfromtimetotime.
Note

Undernocircumstancesshouldtiresolderthan
6yearsbeusedonyourPorsche.
Theageofthetirecanbeobtainedfromthe
"DOT"codenumber.If,forexample,thelast
threenumbersread1202,thenthetirewaspro-
ducedinthe12thweekof2002.

Storetiresinacoolanddryplace.
Snowtires

Forabettergriponsnowandice,useradialM+S
tireswithstuds.
CheckwithyourlocalMotorVehicleBureaufor
possiblerestricTIons.

/!\.Warning!
Riskoflossofcontrolanddamagetothe
vehicleaswellasseverepersonalinjury.
Thestandardtiresprofileandrubbermix-
tureareoptimizedforwetanddrydriving
conditions,andmaynotprovefavorablefor
snowconditions.

I>ThereforeinstallM+Stiresbeforedrivingin
suchconditions.

Spare
Wheel
Thesparewheelissecuredintheluggagecom-
partmentwithwingnuVwingscrewA.
Thereisaplasticsheetinthetoolpocketto
storethedamagedwheel.

Importantnote

Followallwarningsandinstructionsfoundinthis
manualforchangingawheel.
206PracticalTips,EmergencyService
911Carrera,Targa911Carrera4,Carrera45
911
CalTera,
Targa911Carrera
4,
CalTera4S
The911Carrera4isequippedwithacollapsible
sparewheelthatmustbeinflatedwiththeelec-
tricalcompressorwhenneeded.

Tirepressure:36psi(2.5bar).

I>Checkthepressureofthesparewheelregu-
larly:60psi(4.2bar).

A.Warning!
Riskofanaccident.
Forsafetyreasons,thefollowinginstruc-
tionsfortheuseofthesparewheelmust
befollowedexactly.
I>Refertothechapter"Spacerrings"before
fittingthesparewheel.
Ifincorrectlyfitted,thesparewheelmay
comeoffwhilstdriving.
I>Checkthetirefillingpressureimmediately
afterfittingthesparewheel.
I>Thesparewheelmustbeusedonlyover
shortdistancesincasesofemergency.
Afterrepairorreplacement,re-mountthe
roadwheelandtireassoonaspossible.
I>Avoidrapidacceleration,hardbrakingand
highcorneringspeedstopreventlossofve-
hiclecontrol.
Themaximumpermittedspeedis50mphj
80km/handmustnotbeexceededbecause
ofaltereddrivingcharacteristicsandforrea-
sonsofwear.
Thetreaddepthofthesparewheelissubject
tothesamelawsastheoriginaltires.
I>Thevehiclemustbefittedwithonlyone
sparewheel.
I>Donotuseasparewheelfromothervehicles
onyourcar.
Likewise,thesparewheelfromyourvehicle
mustnotbeusedonothercars.
I>Toavoiddamage,donotuseautomaticcar
washeswhenthesparewheelisinstalled.

Spacer
Rings
A.Warning!
Risk
of
accident.
Ifincorrectlyfitted,the
sparewheelmaycomeoffwhiledriving
whichcouldresultinseriouspersonalinjury
ordeath.
I>5mmspacerringsonfrontandrear
axles:
If5mmspacer
ringsarefittedtothewheel
hubs,
donotremove
thesebeforefittingthe
sparewheel.

I>17mmspacerringsonrearaxle:
If17mmspacer
ringsarefittedtothewheel
hubs,theappropriatespacerringmustbe
removedbeforethesparewheelisfitted.
Tomountthesparewheel,usethewheel
boltswhichwereusedtofastenthespacer
ring.
PracticalTips,EmergencyService
207

Jackingpointforfrontwheelchange
1.Slightlyloosenthewheelboltsofthewheel
tobechanged.
2.Setupjackonlyatthepointsprovided.
Thejackfootmustbeincontactoverits
wholearea.
Useasuitablesupportifnecessary.
3.Holdjackstillandwinditupuntilitshead
entersthejackingpointonthecar.
Onlyjackcarupuntilthewheeltobe
changediscompletelyofftheground.
210PracticalTips,EmergencyService
Jackingpointforrearwheelchange
4.Removetopwheelboltandscrewinassem-
blyaidfromthetoolkit.
Removetheremainingwheelbolts.
5.Changewheel.
6.Pleasenotechapter"Wheelbolts".
Insertfourwheelboltsandtightenbyhand.
Removeassemblyaid,screwinremaining
bolt.
Initiallytightenscrewsindiagonallyopposite
sequencesothatthewheeliscentered.
Referto"Spacerrings"and"Collapsiblespare
wheel"ifnecessary.
Screwinginassemblyaid
7.Lowercarandremovejack.
8.Tightenwheelboltsindiagonallyopposite
sequence.
Importantnote
Immediatelyafterchangingawheel,adjustthe
tirefillingpressure(refertoPage5)andusea
torquewrenchtochecktheprescribedtighte-
ningtorqueofthewheelbolts(130Nm).

Collapsiblesparewheel
Refertothechapter"Spacerrings"beforefitting
thesparewheel.
Ifincorrectlyfitted,thesparewheelmaycome
offwhilstdriving.
1.Mountthecollapsiblesparewheelonthe
vehiclebeforeinflatingit.
2.Screwfillerhoseofthecompressorontothe
tirevalve.
3.Insertplugofthecompressorintotheciga-
rettelighter.
Therequiredfillingpressurewillbereached
afterafewminutes.
4.Checkfillingpressurewiththepressuretes-
ter.
Requiredfillingpressure:
36psi(2.5bar).
Ifthepressureistoohigh,releasesomeair
bypressingthevalveinsert.
Afterusingthecollapsiblesparewheel
I>Releaseairbyunscrewingthevalveinsert.
Thetirewillreverttoitsoriginalshapeonly
afterseveralhours.Onlythencanitbe
stowedinthesparewheelrecessinthe
luggagecompartment.
Repair
I>Thecollapsiblesparewheelmustberepaired
onlybythemanufacturer.Pleaseconsultyour
authorizedPorschedealerifthecollapsible
sparewheelisdefective.
PracticalTips,EmergencyService
211

AdjustingHeadlights

Seecautionon"ReplacingBulbs..
Adjustment

Theadjustmentismadewiththevehicleready
todriveandthefueltankcompletelyfilled.
Thedriver'sseatmustbeloadedbyapersonor
a165Ibs.(75kg)weightandthetirepressures
mustmeettheprescribedvalues.
Afterbeingloaded,thecarmustberolledafew
meterssothatthesuspensioncansettle.
236PracticalTips,EmergencyService
Forcheckingtheheadlightadjustment,theverti-
calpositionofthecutoffofthelowbeam(see
fig.)hastobeprojectedonaverticalscreen
(wall)indistanceof7.5mfromthefrontlensof
theheadlamp.
Thecorrectpositionofthecutoffis5cmat
7.5m(0.4°)belowahorizontalline,xcmfrom
groundtothecenteroftheheadlamplens.
Lateraladjustmentoftheheadlightsshouldbe
carriedoutataspecialistworkshopwithanopti-
caladjustmentunit.
Distance
Visualaimshallbeperformedatnotlessthan
7.5m(thisvalueisaroundeddownconversion
fromthe25-footdistancetypicaloffieldaim
usingascreen).The7.5mdistanceis
measuredfromtheheadlamplenstotheviewing
screen.

Tire
andrimsizesExtensivetestsareperformedbeforespecifictiresandwheelsareapprovedbyPorsche.
YourPorschedealerhasinformationaboutapprovedtiresandwheelsandishappytoassistyou.
Ifaftermarkettiresand/orwheelsareinstalledwhicharenotapprovedbyPorsche,thevehicle'sroadabilityandhandling
characteristicsmightbeimpaired.SincePorschehasnodataonsuchcombinations,Porschecannotstandbehind
thesafetyordurabilityoftheseaftermarketcombinations.
SnowchainsCanbemountedonlyontherearwheels;maximumspeed30mph/50km/h,
UseonlyPorscheauthorizedfine-linkcross-typeoredgechains.
Snowchainclearancecanbeguaranteedonlyonthetire+rimcombinationmarked*,
Sparewheel911Carrera:T105/95R17high-pressuretireon3.5Jx17rim.
911Carrera4,Carrera4S:165/70R1692Pcollapsibletireon5.5Jx16rim.
Maximumspeed50mph/80km/h,Alwayscomplywiththeinstructionsinthechapter"Sparewheel",
248TechnicalData

Tire
Pressuresforcoldtires
Summertiresandsnowtires
Front17inchwheels:
18inchwheels:
36psi(2.5bar)overpressure
36psi(2.5bar)overpressure
Rear17inchwheels:
18inchwheels:
36psi(2.5bar)overpressure
44psi(3.0bar)overpressure

Spare
wheel911Carrera
Frontandrear60psi(4.2bar)overpressure
Collapsiblesparewheel911Carrera4,Carrera4S
Frontandrear36psi(2.5bar)overpressure
ThesetirepressuresapplyonlytothetiremakesandtypesapprovedbyPorsche.
Alwaysobserveinstructionsinthechapter"TiresandTireCare",
TechnicalData
249