Valve dimensions
WARNING: This page is about a different car, the 2006 Audi A8, 2005 Audi A8, and 2004 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Valves must not be reworked. Only lapping is permitted.
| Dimension | Intake valve | Exhaust valve |
|---|---|---|
| - a - = dia. mm | 26.8 to 27.0 | 26.8 to 27.0 |
| - b - = dia. mm | 5.94 to 5.95 | 5.94 to 5.95 |
| - c - = mm | 96.4 to 96.6 | 95.3 to 95.5 |
| - α - = ∠° | 45 | 45 |
CAUTION:
- Worn sodium-filled exhaust valves must not be scrapped without first being properly treated.
- Using a metal saw, the valves must be cut into two pieces between the shaft center and valve head. While doing this, do not come into contact with water. At the very most, throw 10 of the prepared valves into a bucket filled with water. Then, move quickly away, because a sudden chemical reaction will occur during which the sodium is burnt away.
- The treated parts may then be discarded through conventional disposal channels.