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Cayenne

2011-2012 Cayenne – Manual

2011-2012 Cayenne – Manual

Page: 270

Valves

  • Use only plastic valve caps.
  • The rubber valves must be replaced whenever the tires are changed.
  • The fitting and replacement specifications must be observed for metal valves.
  • Only use Original Porsche metal valves.
  • Protect the valve inserts against soiling with valve caps. Soiled valve inserts can cause a gradual loss of air.

Parking at the curb

Curb Impact / Tire Damage

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.

  • After such an impact, have the wheel checked by an expert.
  • If 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.


Wheel alignment, wheel balancing
As a precaution, have wheels with summer tires balanced in the spring, and those with mud and snow tires before winter. Unbalanced wheels may affect car handling and tire life.

Only the specified weights may be used for wheel balancing.

Self-adhesive weights must not come into contact with cleaning agents, since they could drop off. Uneven tread wear indicates wheel imbalance. In this event, the vehicle should be checked at an authorized Porsche dealer.

High-Speed tire Vibration

If, during a trip, uneven running or vibrations occur that could be caused by damage to tires or the car, the speed must be reduced immediately, but without braking sharply. If you continue your trip without having the cause of the fault remedied, you might lose control of your vehicle.

  • Stop the vehicle and check the tires.
  • If no cause for the fault can be found, drive carefully to the nearest authorized Porsche dealer.

Wheels with Tire Pressure Monitoring (TPM) sensors
Before changing wheels, make sure that the wheels are compatible with your vehicle's TPM.

  • Check this with your authorized Porsche dealer.

Removing and storing tires

  • After changing, adjust tire pressure and torque wheel bolts diagonally.
    Please see the chapter "CHANGING WHEELS" on page 275.
  • Store tires in a cool and dry place. Rotate periodically to avoid flat spots.
  • Avoid contact with fuel, oil and grease.

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.

Example
FR (front right), FL, RR and RL.

Wheels must always be fitted in accordance with their marking.

The perception that tire durability and performance are not affected by storage and age is unfounded.

Chemical additives, which make the rubber elastic, lose their effectiveness over the course of time and the rubber becomes brittle and cracks.

Therefore, the tires should be inspected from time to time.

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