Removal and Replacement
Removing and installing wheel
Information
Wheel mounting
The wheels on the 911 Carrera (997) and 911 Turbo (997) are secured using the same standard wheel bolts -A- (M14 x 1.5) as are used on the 911 Carrera (996). Length: dimension -X- -> Screw length: approx. 45 mm.
The longer wheel bolts -B- dimension -X- -> Screw length: approx. 50 mm are used on the 911 GT3/GT3 RS/GT2 (997). Designation with GT or red color -arrow-. These wheel bolts can also be recognized by the red spherical cap ring.
Wheel bolt length
Wheels with sensors for TPM
Before changing wheels (e.g. changing from summer to winter wheels), check that the wheels are compatible with the vehicle's tire pressure monitoring (TPM) system.
The TPM system as of 2009 model (2nd generation TPM) is essentially different from the TPM system up to 2008 model (1st generation TPM).
1st generation TPM wheel electronics -A- are not compatible with 2nd generation TPM wheel electronics.
Wheel electronics
If wheels with 1st generation TPM wheel electronics are fitted on a vehicle with 2nd generation TPM wheel electronics (or vice versa), the TPM system will not recognize the wheel electronics. The TPM system is not active and a corresponding warning message appears in the instrument cluster. In addition, the wheel electronics are reported as defective in the fault memory of the TPM control unit.
Refer to the Technical Information for more information and an overview.
Removing wheel
Information
^ Use suitable commercially available tools (wrench size 19 mm)! Never use an impact bolter to tighten the wheel bolts.
^ Before the wheel is placed on the wheel hub, re-grease the centering surface of the wheel hub (if required) as necessary with a very thin coat of Optimoly TA (aluminum paste).
^ The wheel bolt consists of two parts that are permanently joined together. Other wheel bolts must not be used.
Caution
Removing/fitting the wheels for vehicles with PCCB (Porsche Ceramic Composite Brake).
^ Risk of damage to the brake discs.
-> Use assembly aids (assembly pins) in order to exclude any possibility of heavy contact of the wheel with the brake disc. The assembly aids (2 assembly pins) are located in the luggage compartment.
Information
^ The assembly pins for removing/mounting the wheel for vehicles with PCCB can be ordered separately as a spare part. Part No.: 999 571074 30.
- In the case of vehicles with PCCB (Porsche Ceramic Composite Brake), screw the two assembly aids (assembly pins), instead of two wheel bolts, into the wheel hub before removing the wheel. Only then remove the three remaining wheel bolts and remove the wheel carefully, without touching the brake discs.
Assembly pins for vehicles with PCCB brakes
Installing wheel
Notice
Removing/fitting wheels
^ Risk of damage to (ceramic) brake discs
-> Use two assembly pins when removing and fitting the wheel.
-> Carefully guide the wheel towards the wheel hub, thereby preventing any heavy impact on the (ceramic) brake disc.
Information
^ Use suitable commercially available tools (wrench size 19 mm)! Never use an impact bolter to tighten the wheel bolts.
^ Before the wheel is placed on the wheel hub, re-grease the centering surface of the wheel hub (if required) as necessary with a very thin coat of Optimoly TA (aluminum paste).
^ The wheel bolt consists of two parts that are permanently joined together. Other wheel bolts must not be used.
Information
^ The assembly pins for removing/mounting the wheel for vehicles with PCCB can be ordered separately as a spare part. Part No.: 999 571074 30.
1. In the case of vehicles with PCCB (Porsche Ceramic Composite Brake), screw the two assembly aids (assembly pins) into the wheel hub before mounting the wheel.
Wheels with sensors for TPM: Before changing wheels (e.g. changing from summer to winter wheels), check that the wheels are compatible with the vehicle's tire pressure monitoring (TPM) system.
Assembly pins for vehicles with PCCB brakes
2. In the event of heavy soiling, clean the wheel bolts and the concavities in the wheel with a lint-free cloth.
3. Always apply a thin coat of Optimoly TA (aluminum paste) on the thread of the wheel bolts, on the shank and between the bolt head bearing surface and spherical cap ring (under the head) -arrows-. The spherical cap bearing surface -X- of the wheel bolts that face the wheel must not be greased.
Wheel bolt
-A- - Spherical cap ring (permanently connected to the wheel bolt)
-X- - Spherical cap bearing surface facing the wheel (do not grease)
Information
^ Rework on wheel bolts is impermissible.
4. Always replace damaged wheel bolts.
This damage includes mechanical damage to the thread, the spherical cap and damage resulting from seizure of the bolt head bearing surface and spherical cap ring. It must be possible to rotate the spherical cap ring on the bolt shank and to move it in axial direction.
Information
^ Always observe the specified tightening torque of 130 Nm (96 ftlb.).
5. Screw in wheel bolts by hand and then tighten evenly. Start at the top when tightening.