Checking piston ring gap
WARNING: This page is about a different car, the 2004 Volkswagen R32. However, it is still accessible from the selected car via links, so may be relevant.
Special tools, testers and auxiliary items required
- Feeler gauge
Test sequence
- 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 | Gap | ||
| New | Wear limit | ||
| Compression ring | mm | 0.20 to 0.40 | 1.0 |
| Tapered ring | mm | 0.20 to 0.40 | 1.0 |
| Oil scraping ring | mm | 0.25 to 0.50 | 1.0 |