11 12 Cylinder Head with Valve Seat Cover (N55 B30)
WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
CYLINDER HEAD WITH VALVE SEAT COVER SPECIFICATION
| Valve seat angle | ° | 45 |
| Correction angle: outer | ° | 35 |
| Correction angle: Inner, exhaust valve | ° | 60 |
| Correction angle: Inner, inlet valve | ° | 65 |
| Valve seat width: Intake | mm | 1.25 +0.2 |
| Valve seat width: Exhaust | mm | 1.65 +0.2 |
| Ø theoretical valve seat | ||
| Valve seat surface: Outside dia. inlet | mm | 30.4 +0.1 |
| Valve seat surface: Outside dia. exhaust | mm | 26.6 +0.1 |