WM 440519 Removing And Installing Wheel (All Models): Information

Use a suitable commercially available tool (a/f 19 mm). Never use an impact bolter to loosen or tighten the wheel bolts .
Only use original wheel bolts.
Wheel bolts cannot be reworked .
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.
Never grease the wheel bolts and security wheel bolts.
1. Spherical cap ring (permanently connected to the wheel bolt)
2. Spherical cap bearing surface facing the wheel. Do not grease.
3. Thread. Do not grease.
- Arrow - Contact surfaces between the bolt head and spherical cap ring. Do not grease.

Fig 1: Locating Contact Surfaces Between Bolt Head And Spherical Cap Ring
Courtesy of PORSCHE CARS NORTH AMERICA, INC.