2014 PORSCHE 911 TURBO Owners Manual

Minor Repairs 255
fBefore you change a wheel, be sure the ground is level and firm. If necessary, use a board under the jack to ensure that the jack does not sink into the ground.fSet the electric parking brake and block the wheels opposite the flat tire on the other side of the vehicle.fThe jack is only to be used for changing a wheel. Do not use it as a support to work under the car.fThe car must be jacked up only at the illustrated jacking points. Lifting at any other place may result in personal injury.
Risk of damage to the engine or vehicle if you lift the vehicle improperly.fThe car must be jacked up only at the illustrated jacking points. Lifting at any other place may result in damage to the vehicle.fNever jack up the car by the body, bumpers, engine, transmission or at the axles.fDo not damage any sensitive components in the vicinity of the jacking points.fFor safety reasons do not use tire inflating bot-tles. Do not use commercially available sealant bottles. Use only the tire inflating bottle located in the luggage compartment.
Information
The tools required for changing a wheel (e.g. jack, wheel bolt wrench, assembly aids) are not supplied as standard with the vehicle. Your authorized Porsche dealer will be pleased to advise you.
Information
The tire and wheel sizes on both axles are different.fDo not fit the wrong wheels on the wrong axle.fOnly use wheels/tires with approved dimensions for the relevant axle.
Sequence of operation
The jack must be used only to raise the car for wheel changing. The jack must never be used as a support to work underneath the vehicle. If the jack is accidentally dislodged, you or bystanders could suffer severe personal injury.fNever jack up other vehicles or other loads with the jack.fAlways place the car on stable supports if you have to work under it. When working under the vehicle, always use safety stands specifically designed for this purpose.
fPlease use a suitable knee rest to protect your clothing against soiling.1. Activate the electric parking brake and move the PDK selector lever to position P. Remove the ignition key or control unit on vehicles with Porsche Entry & Drive.2. Switch on the emergency flasher if necessary.
3. Secure the vehicle to prevent it from rolling away, e.g. by means of wedges under the wheels on the opposite side.This is particularly important on slopes.4. Slightly loosen the wheel bolts on the wheel to be changed.5. Lift the vehicle only at the specified jacking points.6. Raise the vehicle until the wheel lifts off the ground. fPlease see the chapter “RAISING THE VEHICLE WITH A LIFTING PLATFORM, TROLLEY JACK OR STANDARD JACK” on page 254.7. Remove 1 or 2 wheel bolts (see corresponding figure).NOTICE
Working Under VehicleWARNINGh
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256 Minor Repairs
Screw in one assembly aid on vehicles without PCCB
8.Screw in assembly aids instead of wheel bolts.
Risk of damage to brake disks.fAlways screw in both assembly aids when changing a wheel.
9. Remove the remaining wheel bolts. 10. Take the wheel off and put a new wheel on.fPlease see the chapter “WHEEL BOLTS” on page 257.11. Insert wheel bolts and tighten by hand.
Screw in two assembly aids on vehicles with PCCB
12.Remove assembly aids and screw in remaining wheel bolts.Initially tighten bolts only slightly in diagonally opposite sequence so that the wheel is centered.13. Inflate the tire if necessary.fPlease see the chapter “TIRE PRESSURE FOR COLD TIRES (68 °F/ 20 °C)” on page 287.14. Lower the vehicle fully and remove the jack.
15. Tighten wheel bolts in diagonally opposite sequence.Immediately after changing a wheel, use a torque wrench to check the prescribed tightening torque of the wheel bolts (160 Nm/118 ftlb.).
Note on operation for vehicles with Tire Pressure Monitoring
fOn vehicles with Tire Pressure Monitoring, the settings on the multi-function display must be updated after the wheel change.fPlease see the chapter “TIRE PRESSURE MENU (TIRE PRESSURE MONITORING SYSTEM, TPMS)” on page 105.
Checking tire pressure with a pressure gauge
1. Remove the valve stem cap from the tire. 2. Press the pressure gauge onto the valve stem.
Information
fDo not press too hard or force the valve stem sideways, or air will escape.If the sound of air escaping from the tire is heard, reposition the pressure gauge.
3. Read the tire pressure on the gauge stem and compare it to the permissible tire pressure.This information can be found on the tire pressure plate or in the chapter Technical Data.4. Remove the pressure gauge. 5. Please see the chapter “TIRE PRESSURE MENU (TIRE PRESSURE MONITORING SYSTEM, TPMS)” on page 105.
NOTICE
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Minor Repairs 257
Do not grease wheel attachment face B
Wheel Attachment Faces
There is a risk of damage to the wheel and wheel attachment face.fThe wheel attachment face B on the brake disk and on the wheel itself must not be greased.fOnly the areas A may be greased. Grease these areas very thinly with Optimoly® TA. Do not use any other grease/paste.
Wheel Bolts
fAlways clean the wheel bolts before fitting.fWheel bolts must not be greased.fReplace damaged wheel bolts.Only use genuine Porsche wheel bolts assigned especially to this model or wheel bolts of similar quality that have been manufactured according to Porsche specifications and production requirements.
Tightening torque
Tightening torque for wheel bolts: 160 Nm (118 ftlb.) .
Security wheel bolts
The adapter (wrench socket) for the security wheel bolts is stored in the tool box in the luggage compartment.fIf the wheels have to be removed at the workshop, do not forget to hand over the socket for the security wheel bolts along with the car key.fTo loosen or tighten the wheel bolt with anti-theft protection, the adapter must be used between the wheel bolt and the wheel bolt wrench.fWhen positioning the wrench socket, ensure that it engages fully in the teeth of the wheel bolt.
NOTICE
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258 Minor Repairs
Wheels with Central Lock
Racing technology for the road. Wheels with a central lock are perfectly normal in motor sport, but are not common on normal roads.Instead of the central lock nuts conventionally used in motor sport, the wheel has an encapsulated central bolt, which is used to fasten it to the wheel hub.
Driving on a race circuit (e.g. sports driving school, club sport events)
Wheels are subjected to significantly higher stresses during extremely sporty driving – particularly when driving on race circuits – compared to driving on public roads. For this reason, all the instructions specified below must always be noted and followed for driving on race circuits.fAlways make enquiries with your authorized Porsche dealer about any other driving and maintenance instructions before driving on race circuits.
The central lock, like all chassis components, requires greater attention while driving on race circuits.fCheck the tightening torque of the central bolts before, if necessary during and after driving on a race circuit.fWhenever wheels are changed, apply some aluminum paste to the trapezoidal thread on the wheel hub or have a second set of greased screws on hand.fNever drive the vehicle without a central lock bolt in the hub.fAll central wheel lock components, such as the central bolt, wheel, wheel hub, wheel hex and brake disk must always be checked for wear and replaced if necessary after driving on a race circuit.
fAxis components subject to high loads must be replaced at intervals specified by Porsche . Always make enquiries with your authorized Porsche dealer about the current stipulations before driving on race circuits.fOther parts such as ball joints, rubber mounts, etc., where wear may result in modified vehicle handling, must be checked and if applicable replaced without delay.
Deferring inspection, maintenance and replacement measures can result in accidents.
This is particularly true if you are clocking up high mileage on race circuits . We recommend that you get an authorized Porsche dealer to carry out these measures.
Components can break or become damaged. Unsuitable wheel sizes or incorrectly dimensioned components in the hub area of accessory wheels , the use of spacers, etc. can impair the overall function of the wheel mounting.fOnly use wheel/tire combinations approved by Porsche.fUnder no circumstances should spacers be used.
Central Bolts
The central bolt and central bolt lock are safety-related components. Always check them for signs of wear and damage.fThe conical surface, trapezoidal thread and inner toothing of the central bolt must not be scratched or cracked.fReplace damaged central bolts.Only use the genuine Porsche central bolts allocated specifically to this vehicle model.fThe conical surface and trapezoidal thread on the central bolt must be perfectly clean.
Tightening torque for central bolts: 443 ftlb. (600 Nm).
Changing a Wheel
fGet an authorized Porsche dealer to change the wheel.
Information
The tools required for changing a wheel (e.g. jack, torque wrench) are not supplied as standard with the car. Your authorized Porsche dealer will be pleased to advise you.
Deferred inspection, maintenance and replacement measures
Inadequate screw connections when using unapproved components and wheels
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Minor Repairs 259
If a wheel needs to be changed, the procedure described below must be adhered to exactly, as otherwise the wheel may loosen, resulting in damage. Porsche cannot be held liable if this happens.To achieve the high tightening torque required for the central bolt, a suitable, commercially available 443 ftlb. (600 Nm) torque wrench must be used. Alternatively, a corresponding tool with torque multiplier (part no. 997.450.323.90) is available from Porsche Motorsport. When a torque multiplier is used, the torque must be reduced in accordance with the tool’s operating instructions.
When loosening and fastening the wheel, a second person is needed to prevent the wheel from turning by firmly braking it.
The high mounting forces involved can cause the vehicle to roll away and slip off the jack.fAlways use a lifting platform if there is one available.
Risk of damage due to vehicle tipping over or falling off lifting equipment or using the wrong tool.
The high mounting forces involved can cause the vehicle to roll away and slip off the jack. An impact wrench can damage the central lock.fAlways use a lifting platform if there is one available.fDo not use an impact wrench .
1. Apply the electric parking brake, move the PDK selector lever to position P and remove the key from the ignition.2. Secure the vehicle carefully in both directions to prevent it from rolling away, e.g. using wedges at the wheels on the opposite side.This is particularly important on slopes.3. Raise the vehicle until the wheel lifts off the ground. Lift the vehicle only at the specified jacking points.fPlease see the chapter “RAISING THE VEHICLE WITH A LIFTING PLATFORM, TROLLEY JACK OR STANDARD JACK” on page 254.
Information
The vehicle must not be standing on the wheel to be secured during fitting.
4. Open the luggage compartment and lift the plastic cover A. Please see the chapter “TIRE FILLING COMPRESSOR” on page 198.Open the receptacle B and remove the polygon tool.The central bolt must only be opened using this original polygon tool. Always leave the polygon tool in the luggage compartment to ensure that it is always available in the event of a breakdown.
Risk of damage from scratching.fProceed with care when removing the wheel-hub cap.
Tipping or falling vehicleWARNINGh
NOTICE
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260 Minor Repairs
5.The polygon tool contains an auxiliary tool. Remove this from the square and replace it afterwards.Use the auxiliary tool to carefully lever the wheel-hub cap out of its seating. For this purpose, insert the metal tongue of the auxiliary tool deep into the opening groove A on the central bolt and then swivel the handle back.
6. Position the polygon tool and insert it until it engages . This opens the safety lock on the central bolt.
Information
A very high torque is required to loosen the central bolt, especially if it has not been opened in a long time.
fTurn in the correct direction.fMake sure there is sufficient clearance so that neither people nor vehicle parts will be harmed if the lever breaks away.fThe wheel should be prevented from turning by getting a second person to brake firmly using the brake pedal.fHold the steering wheel securely when loosening the front wheels.
Risk of damage to the central bolt lock.fWhen loosening the central bolt, make sure that the tool remains pushed on fully and does not slide out of position.
7. Unscrew the central bolt and set it down in such a way that no dirt can enter the cone area or the thread.
NOTICE
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Minor Repairs 261
There is a risk of damage to brake disks on vehicles with Porsche Ceramic Composite Brake (PCCB).fDo not tilt the wheel when removing it.
8. Remove wheel carefully. 9. Check that the toothed locking bolt C moves smoothly.When you press the bolt into its element, it must return firmly to its original position without catching.The toothing on the locking bolt C must not be damaged.The cone ring A must turn easily in the central bolt.10. There must be a generous coating of grease on the thread of the central bolt and wheel hub. Whenever wheels are changed, apply some aluminium paste to the trapezoidal thread on the wheel hub.
Always grease the conical area A (45° area) of the central bolt and the cylindrical part B of the wheel hub with a light coating of aluminum paste before fitting the central bolt. Make sure that no dirt sticks to the components.All other parts must be free of grease.
Deferring inspection, maintenance and replacement measures can result in accidents.
Carry out a visual inspection of all parts before fitting the wheel.
The central bolt and central bolt lock are safety- related components. Always check them for signs of wear and damage.fThe affected parts must be replaced by your authorized Porsche dealer if they are damaged or if you suspect that they are not in perfect working order.fThere must be no scratches or cracks on the cone area, thread or inner teeth of the bolt.fThe cone ring must turn easily in the central bolt.fThere must be a generous coating of grease on the thread of the central bolt and wheel hub.fOnly brake disks that were approved for the central lock may be fitted.fAll contact surfaces on the wheel, wheel hub and brake disk as well as the thread in the wheel hub must be free of abrasion, sand, dust or shavings.
fThe central bolt lock C prevents the central bolt from being lost and must not therefore be removed from the wheel hub.
There is a risk of damage to brake disks on vehicles with Porsche Ceramic Composite Brake (PCCB).fDo not tilt the wheel or place it against the brake disk when mounting it.
11. Fit the wheel carefully.
NOTICE
Damaged, missing, soiled or incorrectly greased central wheel lock components
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262 Minor Repairs
Information
The vehicle must not be standing on the wheel to be secured during fitting.
12. Insert the central bolt into the polygon tool (until it engages), fit the central bolt at right angles to the wheel hub and screw it on without tilting.13.Tighten the central bolt to 443 ftlb. (600 Nm) using a suitable torque wrench. Prevent the resultant turning of the wheel by getting a second person to firmly press the brake pedal. Hold the steering wheel securely when tightening the front wheels.
14. Loosen the central bolt again by 1/4 turn. 15. Tighten the central bolt again to 443 ftlb. (600 Nm) .
Information
If you do not have a suitable torque wrench in a breakdown situation, the emergency procedure for fastening the central bolt must be performed.fPlease see the chapter “CENTRAL BOLT EMERGENCY FASTENING” on page 263.
16. Remove the polygon tool and check whether the locking pin C has already automatically engaged in the central bolt. The locking pin then completely covers the inner teeth of the central bolt. The locking pin is usually still in the rear position and must be turned to the left and right slightly using the auxiliary tool until it engages with spring force in the central bolt.
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