Piston Ring Measurements
M54 2.5L / 3.0L Piston Rings| M54 2.5L | -- | -- |
| 1st groove | -- | -- |
| End clearance | mm | 0.20 - 0.40 |
| Axial play | mm | 0.020 - 0.060 |
| 2nd groove | -- | -- |
| End clearance | mm | 0.20 - 0.060 |
| Axial play | mm | 0.020 - 0.060 |
| 3rd groove (oil scraper) | -- | -- |
| End clearance | mm | 0.20 - 0.45 |
| Axial play | mm | 0.015 - 0.060 |
| -- | -- |
| M54 3.0L | -- | -- |
| 1st groove | -- | -- |
| End clearance | mm | 0.20 - 0.40 |
| Axial play | mm | 0.020 - 0.060 |
| 2nd groove | -- | -- |
| End clearance | mm | 0.20 - 0.40 |
| Axial play | mm | 0.020 - 0.060 |
| 3rd groove (oil scraper) | -- | -- |
| End clearance | mm | 0.20 - 0.45 |
| Axial play | mm | 0.015 - 0.060 |