11 21 Crankshaft and Bearings N63 B44
WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2015 BMW Alpina B7L, 2015 BMW Alpina B7, 2014 BMW Alpina B7L, 2014 BMW Alpina B7, and 2013 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.
CRANKSHAFT AND BEARINGS SPECIFICATION
| Ground sizes of main bearing journals | Bearing journal 1 | |
| Original (designation S1) | mm | 64.974... 64.980 |
| Original (designation S2) | mm | 64.967... 64.973 |
| Original (designation S3) | mm | 64.961... 64.966 |
| Grinding stage 1 (designation B1) | mm | 64.724... 64.730 |
| Grinding stage 1 (designation B2) | mm | 64.717... 64.723 |
| Grinding stage 1 (designation B3) | mm | 64.711... 64.716 |
| Grinding stage 2 (designation C1) | mm | 64.474... 64.480 |
| Grinding stage 2 (designation C2) | mm | 64.467... 64.473 |
| Grinding stage 2 (designation C3) | mm | 64.461... 64.466 |
| Crankshaft bearing clearance, radial | mm | 0.020... 0.046 |
| Max. permitted runout at center crankshaft journal | mm | 0.15 |