Checking piston ring end gap
WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
- Insert ring at right angle to cylinder wall from above to lower cylinder opening approx. 15 mm from cylinder edge. Use piston without rings to insert.
| Piston ring (Distance 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 scraper ring | 0.25 to 0.50 | 0.8 |