Measuring piston ring gap
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 Audi S4, 2008 Audi S4, 2007 Audi S4, 2006 Audi S4, and 2005 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of VOLKSWAGEN UNITED STATES, INC.
- Push ring squarely from above down to approx. 15 mm from bottom end of cylinder. To do this use a piston without rings.
| Piston ring dimensions in mm |
New |
Wear limit |
| 1. Compression ring |
0.25 to 0.40 |
0.8 |
| 2. Compression ring |
0.20 to 0.40 |
0.8 |
| Oil scraping ring |
|
0.4 |