Measuring piston ring side clearance
WARNING: This page is about a different car, the 2010 Audi A8, 2009 Audi A8, 2008 Audi A8, and 2007 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.
 Courtesy of VOLKSWAGEN UNITED STATES, INC.
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- Clean ring groove of piston before checking.
| Piston ring dimensions in mm |
New |
Wear limit |
| 1. Compression ring |
0.035 to 0.085 |
0.200 |
| 2. Compression ring |
0.005 to 0.045 |
0.150 |
| Oil scraping ring |
0.010 to 0.050 |
0.200 |