Checking piston ring gap
WARNING: This page is about a different car, the 2009 Audi A4, 2008 Audi A4, 2007 Audi A4, 2006 Audi A4, and 2005 Audi A4. 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 |
0.35 to 0.50 |
0.8 |
| 2. Compression ring |
0.60 to 0.80 |
1.0 |
| Oil scraping ring |
0.25 to 0.50 |
0.8 |