11 12 Cylinder Head With Valve Seat Cover N51 B30
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.
CYLINDER HEAD AND VALVE SEAT COVER GENERAL SPECIFICATION
| 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 |