11 12 Cylinder Head with Valve Seat Cover N51 / B30
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2013 BMW 328xi, 2013 BMW 328i, 2012 BMW 328xi, 2012 BMW 328i, and 2011 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.
TECHNICAL DATA - CYLINDER HEAD WITH VALVE SEAT COVER N51 B25
| Valve seat angle | ° | 45 |
| Correction angle: outer | ° | 15 |
| Correction angle: inner | ° | 60 |
| Valve seat width: Inlet | mm | 1.0 +0.1 |
| Valve seat width: Exhaust | mm | 1.2 +0.1 |
| Ø Valve seat | ||
| Valve seat surface: Outside dia. inlet | mm | 34.2+0.1 |
| Valve seat surface: Outside dia. exhaust | mm | 29.0+0.1 |