2014 PORSCHE 911 TURBO tires

Maintenance and Car Care 237
Improperly secured floor mats can obstruct pedal travel.fAlways check the movement of the pedals before driving and make sure that they are not obstructed by a floor mat or any other object.fSecure the floor mat to prevent it from sliding into positions that could interfere with the safe operation of your vehicle – do not lay them loosely in the vehicle.Your authorized Porsche dealer will be glad to offer you floor mats of correct size including a securing possibility.
Cleaning airbag covers
Incorrect modifications may damage the airbag system. The airbag may not deploy properly in the event of an accident.fDo not make any modifications whatsoever to individual components, such as the padded covers on the steering wheel, the instrument panel, the underside of the instrument panel, front seats and door panels.fHave your authorized Porsche dealer to clean these components.
Cleaning fabric linings
fFabric linings on pillars, roofliner and sun blinds, etc. must be cleaned only using suitable cleaning agents or a suitable dry foam and a soft brush.
Alcantara® care
Do not use leather care products to clean Alcantara®. Alcantara® is a manufactured product. It is not genuine leather or suede.
For regular care, it is sufficient to clean the cover with a soft brush.
Strong abrasion or rubbing when cleaning will produce a lasting change to the surface.
Cleaning when lightly soiled
fWet a soft cloth with water or a neutral soap solution and wipe off the dirt.
Cleaning when heavily soiled
fWet a soft cloth with lukewarm water or thinned white spirit and dab the dirt from the outside in.
Cleaning the safety belts
fUse mild detergent to clean soiled belts.fWhen drying, avoid direct sunlight.fOnly use suitable cleaning agents.fDo not tint or bleach the belts.The belt fabric could be weakened, thus affecting safety.
Storing your Porsche
If you intend to store your Porsche for a prolonged period, please consult your authorized Porsche dealer. The staff will be glad to advise you on the most suitable and necessary methods. fClean your vehicle thoroughly inside and outside. The under carriage and chassis components should be free of dirt and salt deposits. fFill up the fuel tank. fChange the oil and oil filter, and run the engine for several minutes. fIncrease the tire pressure to 50 psi/3.5 bar/350 kPa.It is not recommended to lift the vehicle, due to the possibility of corrosion on shock absorber piston shafts.The vehicle should be moved slightly, approximately every four weeks, to prevent flat spot on the tires.
Climate control
The air conditioning system should be in good working condition and fully charged.
Windshield/Headlight washer
fCheck and correct antifreeze/cleaning solution level as necessary.
Obstructed Pedals
Vehicle Interior Modifications
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Minor Repairs
Exercise Extreme Caution when Working on your vehicle .............................. 240Checking the Coolant Level and Adding Coolant .......................................... 242Brake Fluid ................................................ 243Electromechanical Power Steering............... 244Changing Air Cleaner .................................. 244Changing Particle Filters ............................. 244Tires and Wheels ........................................ 244Changing Wheels........................................ 254Wheel Attachment Faces ............................. 257Wheel Bolts................................................ 257Wheels with Central Lock ............................ 258Central Bolts .............................................. 258Changing a Wheel....................................... 258Rim Cleaner ............................................... 263Central Bolt Emergency Fastening ............... 263Flat Tire ..................................................... 265Electrical System ....................................... 267Battery (12 volt) ......................................... 271External Power Supply, Emergency starting with jumper cables ......................... 273Changing Car Key (Remote Control) Battery . 275Replacing bulbs.......................................... 276Headlights ................................................. 276Headlight Adjustment .................................. 277Towing ...................................................... 278Fire extinguisher......................................... 282
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244 Minor Repairs
Information
If the warning light and warning message appear when driving: fStop immediately in a suitable place.fDo not continue driving.Please contact an authorized Porsche dealer.
For information on warning messages on the multi- function display: fPlease see the chapter “OVERVIEW OF WARNING AND INFORMATION MESSAGES” on page 129.
Electromechanical Power Steering
When the engine is stopped (e.g. when on tow), no power steering assistance is available.Increased force is required for steering.fExercise extreme care when your vehicle is being towed.fHave the fault corrected. Please contact an authorized Porsche dealer.
Changing Air Cleaner
Regular replacement of the filter element is part of servicing.fIn dusty conditions, clean the filter element more frequently and replace it if necessary.fPlease see the chapter “MEASUREMENTS ON TEST STANDS” on page 241.
Changing Particle Filters
Regular replacement of the filters is part of servicing.
Dirty filters can be the cause of reduced air throughput, e.g. the windows can mist up.fHave the filters replaced.Please contact an authorized Porsche dealer.
Information
The particle filters ensure that the fresh air entering the passenger compartment is virtually free of dust and pollen.fIf the outside air is polluted by exhaust fumes, press the recirculated-air button.
Tires and Wheels
The original equipment tires and wheel rims on your Porsche comply with all applicable Federal Motor Vehicle Safety Standards.
Information
The summer tires of your Sports Car have been specially developed and adapted for high performance.The tire characteristics change at low outside temperatures (below 15 °C).This can result in noises when parking or maneuvering at low outside temperatures.
For your safety remember the following:
– Wheel rims and wheel bolts are matched to fit your Porsche.– If you intend to use other than original equipment wheels, be sure that they conform to Porsche specifications for your model. Only tires with the same make and with the same specification code (e.g. “N0”, “N1”...) can be mounted.– The use of wheel rims and wheel bolts that do not meet specifications of the original factory installed equipment will affect the safe operation of your vehicle and affect warranty coverage.– Before you plan on exchanging wheels, or snow tires already mounted on the wheel rims, consult your authorized Porsche dealer. Your dealer has the technical information necessary to advise you which wheel rims and wheel bolts are compatible with the original factory installations.
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Driving with damaged tires could cause you to lose control of the vehicle.fIf while driving, your vehicle experiences a sudden vibration or ride disturbance, and/or you suspect that possible damage to your tires or vehicle has occurred, you should immediately reduce your speed without excessive use of the brakes.fStop the vehicle as soon as possible, and inspect the tires.If you cannot determine the cause for the disturbance, have your vehicle towed to the nearest Porsche or tire dealer to have your vehicle or tire(s) inspected.fContinuing to operate the vehicle without correction could result in a loss of control.Example
Uniform Tire Quality Grading
Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width.
All passenger car tires must conform to Federal Safety Requirements in addition to these grades.
Treadwear
The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specific government test course. For example, a tire graded 150 would wear one and a half (1-1/2) times as well on the government course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm due to variations in driving habits, service practices and differences in road characteristics and climate.
Traction AA, A, B, C
The traction grades, from highest to lowest, are AA, A, B, and C and they represent the tire's ability to stop on wet pavement as measured under controlled conditions on specified government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance.
Information
The traction grade assigned to this is based on braking (straight-ahead) traction tests and does not include cornering (turned) traction, acceleration, hydroplaning or peak traction characteristics.
Temperature A, B, C
The temperature grades are A (the highest), B and C, representing the tire's resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel.Sustained high temperatures can cause the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire failure.The grade C corresponds to a level of performance which all passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 109.Grades B and A represent higher levels of performance on the laboratory test wheel than the minimum required by law.
Tire Damage While Driving
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246 Minor Repairs
The temperature grade for this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, underinflation, or excessive loading, either separately or in combination, can cause heat buildup and possible tire failure.fDo not exceed the permitted maximum speed for the tires fitted to the vehicle.fEnsure that the tires are set to the correct inflation pressure.fObserve the maximum load for the vehicle.
Tire pressures
Driving the vehicle with low tire pressure increases risk of a tire failure and resulting loss of control. Furthermore, low tire pressure increases rate of wear of the affected tires and causes damage. fAlways use an accurate tire pressure gauge when checking inflation pressures.fDo not exceed the maximum tire pressure listed on the tire sidewall. (Also refer to “Technical data”).fPlease see the chapter “TIRE PRESSURE PLATE” on page 247.fCold tire inflation pressure means: all tires must be cold, ambient temperature maximum 68 °F (20 °C), when adjusting the inflation pressure. Avoid sunlight striking the tires before measuring cold pressures, since the pressures would rise from temperature influence.fValve caps protect the valve from dust and dirt, and thus from leakage. Always screw caps tightly down. Replace missing caps immediately.
fUse only plastic valve caps.fFor safety reasons, don't use tire inflating bottles.
fPlease see the chapter “TIRE PRESSURE FOR COLD TIRES (68 °F/ 20 °C)” on page 287.
Each tire, including the spare (if provided), should be checked monthly when cold and inflated to the
inflation pressure recommended by the vehicle manufacturer on the vehicle placard or tire inflation pressure label. (If your vehicle has tires of
a different size than the size indicated on the vehicle placard or tire inflation pressure label, you
should determine the proper tire inflation pressure
for those tires.)
As an added safety feature, your vehicle has been equipped with a Tire Pressure Monitoring System (TPMS) that illuminates a low tire pressure telltale when one or more of your tires is significantly under-inflated. Accordingly, when the low tire pressure telltale illuminates, you should stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving on a significantly under-inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency and tire tread life, and may affect the vehicle’s handling and stopping ability.
Please note that the TPMS is not a substitute for proper tire maintenance, and it is the driver’s responsibility to maintain correct tire pressure, even if under-inflation has not reached the level to trigger illumination of the TPMS low tire pressure tell-tale.
For further information on the tire pressure monitoring:fPlease see the chapter “TIRE PRESSURE MENU (TIRE PRESSURE MONITORING SYSTEM, TPMS)” on page 105.
When tires are warm, the tire pressure is increased.fNever let air out of hot tires. This could cause the tire pressure to fall below the prescribed value.
Insufficient tire pressure can cause tires to over- heat and thus be damaged – even invisibly. Hidden tire damage is not eliminated by subsequently correcting the tire pressure.
Overloading
Overloading can lead to dangerous vehicle reactions and long braking distances.fDo not overload your vehicle. Be careful about the roof load. fIf you plan to load the vehicle, first correct the tire pressure. Tire pressure for loaded vehicle can be found on the tire pressure plate and in the chapter technical data.fNever exceed the specified axle load.
Tire Abuse
Low Tire Pressure
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Minor Repairs 247
Risk of damage to the vehicle and to the tires.
Damage due to overloading is not covered by the vehicle warranty.
Tire damage may also be caused by overloading, and this damage is not covered by your tire warranty.fDo not overload your vehicle. Be careful about the roof load. fIf you plan to load the vehicle, first correct the tire pressure. Tire pressure for loaded vehicle can be found on the tire pressure plate and in the chapter technical data.fNever exceed the specified axle load.
fPlease see the chapter “LOADING INFORMATION” on page 204.
NOTICE
Example of a tire pressure plate
Tire Pressure plate
Information on the tire pressure plate
A Seating capacity
Maximum number of vehicle occupants, including the driver.B Vehicle load limit
Is the maximum total weight limit specified of the load (passengers and cargo) for the vehicle. This is the maximum weight of passengers and cargo that can be loaded into the vehicle. Please see the chapter “LOADING INFORMATION” on page 204.
C Original tire size
Size of tires mounted at the factory. D Recommended cold tire inflation pressure
These values are for cold tires (68 °F/20 °C).
Tire traction
When driving on wet or slushy roads, a wedge of water may build up between the tires and the road. This phenomenon is known as “hydroplane” and may cause partial or complete loss of traction, vehicle control or stopping ability.fReduce speed on wet surfaces.
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248 Minor Repairs
Tire life
Tire life depends on various factors, i.e., road surfaces, traffic and weather conditions, driving habits, type of tires and tire care.fInspect your tires for wear and damage before driving off. If you notice uneven or substantial wear, wheels might need alignment or tires should be balanced or replaced.
Tire wear
The original equipment tires on your Porsche have built-in tire wear indicators. They are molded into the bottom of the tread grooves and will appear as approximately 1/2 in. (12 mm) bands when the tire tread depth is down to 1/16 of an in (1.6 mm).
When the indicators appear in two or more adjacent grooves, it is time to replace the tires. We recommend, however, that you do not let the tires wear down to this extent. Worn tires cannot grip the road surface properly and are even less effective on wet roads.
In the United States, state laws may govern the minimum tread depth permissible. Follow all such laws.
Driving on worn tires can result in loss of control of the vehicle and could cause serious personal injuries or death.fDo not drive with worn tires or tires showing cuts or bruises as they may lead to sudden deflation and loss of control which could cause severe personal injury.fSpecialized high performance tires on high performance sports cars exhibit more wear than those on a family sedan, or even a high performance sedan. Therefore, it is important to check your tire
pressure and condition at least every two weeks.
fIf you notice that tires are wearing unevenly, consult your authorized Porsche dealer.
Uneven wear may not always be due to improper wheel alignment. It can be the result of individual driving habits such as cornering at high speeds. If the tire pressure is not checked and adjusted regularly, abnormal tire wear can also occur.
Tire care
fAvoid damaging tires and wheel rims.fIf you must drive over a curb or other obstacle, drive slowly and at an obtuse angle.fCheck tires for uneven wear and damage before driving off.fRemove embedded material.fReplace worn or damaged tires immediately.fKeep oil, fuel, brake fluid, etc. away from tires.fReplace missing valve stem caps.fKeep tires inflated correctly.fWash tires when washing the vehicle. Also clean inner side of wheels.fDo not use abrasive cleaners when washing the wheels.fCheck wheel rims for corrosion.fRemove road salt, if driving in winter.
Tire damage, puncture
fPlease see the chapter “HIGH-PRESSURE CLEANING EQUIPMENT, STEAM CLEANERS” on page 232.
Driving the vehicle with low tire pressure increases risk of a tire failure and resulting loss of control. Furthermore, low tire pressure increases the rate of wear of the affected tires.fCheck tires – including sidewalls – regularly for foreign bodies, nicks, cuts, cracks and bulges.fAfter driving off road, examine tires for signs of damage such as cuts, tears, bulges or foreign objects stuck in the tread. Replace a damaged tire if necessary.fCross curb edges slowly and at right angles if possible. Avoid driving over steep or sharp curbs.fIn cases of doubt, have the wheel (particularly the inner side) checked by an authorized Porsche dealer.
In case of tire damage, where it is uncertain whether there is a break in the ply with all its consequences or tire damage caused by thermal or mechanical overloading due to loss of pressure or any other prior damage, we recommend that the tire be replaced for safety reasons.
If one faulty tire is replaced it should be noted that the difference in tread depth on one axle must not exceed 30%. Handling inconsistencies may result.fRecommendation: Replace both tires on one axle so that no handling inconsistencies may result due to different tread depths.fPerform a visual inspection if necessary.
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Tire replacements
fUse only tire makes and types tested by Porsche.
If you do not use a Porsche recommended replacement tire, make sure that you purchase your new tires from a reputable tire dealer and that the dealer complies with all manufacturers warnings for those tires.
Only tires with the same manufacturer and with the same specification code (e.g. “N0”, “N1”…) should be mounted on the vehicle.
Before mounting new tires, check with your Porsche dealer about the current release status.
Use tires with “ZR” quality standards. There are currently no standards concerning tire strength at speeds above 150 mph (240 km/h).
Tires should be replaced no less than on one axle at the time. Only tires of the same make and type must be used. Mixed tires are not permissible and will affect vehicle performance, safety, and can affect vehicle warranty.
Porsche dealers can recommend the most current replacement tire options for your vehicle.
Initially, new tires do not have their full traction. You should therefore drive at moderate speeds during the first 60 - 120 miles (100 - 200 km).
Tires must always remain on the same side of the vehicle.When wheels are removed, the direction of rotation and position of each wheel should be marked.
If new tires are installed only on one axle, a noticeable change in handling occurs due to the different tread depth of the other tires. This happens especially if only rear tires are replaced. However, this condition disappears as the new tires are broken in.fPlease adjust your driving style accordingly.
Installation of new tires should only be done by a qualified tire technician.
Valves
fUse only plastic valve caps.fPlease read the fitting and replacement instructions regarding metal valves.fUse original Porsche metal valves only.fValve inserts with valve caps protect against soiling.Soiled valve inserts can cause a gradual loss of air.
Parking at the curb
Hard impacts against curbs (or traffic islands) are dangerous and may cause hidden tire damage which is not noticeable until later. Such damage can result in accidents at high speeds. Depending on the force of impact, the edge of the rim can also be damaged.fAfter such an impact, have the wheel checked by an expert.fIf you must drive over a curb or other obstacle, drive slowly and at an obtuse angle. Exercise care when parking along curbs.
Information
Tire repairs are not permissible under any circumstances.
Curb Impact / Tire Damage
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