11 12 Cylinder Head and Valve Seat Cover (N55)
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2015 BMW 740i, 2015 BMW 740Li xDrive, 2015 BMW 740Li, 2014 BMW 740i, and 2014 BMW 740Li xDrive. However, it is still accessible from the selected car via links, so may be relevant.
CYLINDER HEAD AND VALVE SEAT COVER SPECIFICATION
| Valve seat angle | ° | 45 |
| Correction angle: outer | ° | 35 |
| Correction angle: Inner, exhaust valve | ° | 60 |
| Correction angle: Inner, intake 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 | 266+0.1 |