Valve Dimensions
WARNING: This page is about a different car, the 2015 Audi A7 Quattro and 2014 Audi A7 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Intake and exhaust valves must not be reworked. Only lapping is permitted.
| Dimension | Intake Valve | Exhaust Valve | |
|---|---|---|---|
| Diameter a | mm | 28.5 to 28.7 | 25.9 to 26.1 |
| Diameter b | mm | 5.968 to 5.982 | 5.958 to 5.972 |
| c | mm | 97.2 to 97.4 | 99.0 to 99.2 |
| α | ∠° | 45° 10' | 45° 10' |
WARNING:
Risk of injury if exhaust valves with sodium filling are disposed of improperly.
- Cut exhaust valve with sodium filling into 2 parts with a metal saw between shaft center and valve plate. While doing this, do not come into contact with water.
- Throw at the most 10 such sawed exhaust valves in a bucket filled with water and step back immediately.
- When there is contact with water, a sudden chemical reaction occurs which burns the sodium filling.
- The treated parts may then be discarded through conventional disposal channels.