11 21 Crankshaft and Bearings N52T B25
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
MAIN BEARING JOURNAL NUMBER (1) SPECIFICATION
| Ground sizes of main bearing journals | Main bearing journal number 1 | |
| Original (designation S1) | mm | 55.989... 55.983 |
| Original (designation S2) | mm | 55.982... 55.977 |
| Original (designation S3) | mm | 55.976... 55.970 |
| Crankshaft bearing clearance, radial | mm | 0.020... 0.046 |
| Max. permitted runout at center crankshaft journal | mm | 0.150 |
MAIN BEARING JOURNAL NUMBERS (2, 3, 4, 5, 6) SPECIFICATION
| Ground sizes of main bearing journals | Main bearing journal numbers 2,3,4,5,6 | |
| Original (designation S1) | mm | 55.999... 55.993 |
| Original (designation S2) | mm | 55.992... 55.987 |
| Original (designation S3) | mm | 55.986... 55.980 |
| Crankshaft bearing clearance, radial | mm | 0.020... 0.046 |
| Max. permitted runout at center crankshaft journal | mm | 0.150 |
GUIDE BEARING JOURNAL NUMBER (7) SPECIFICATION
| Ground sizes of main bearing journals | Guide bearing journal number 7 | |
| Original (designation S1) | mm | 64.999... 64.993 |
| Original (designation S2) | mm | 64.992... 64.987 |
| Original (designation S3) | mm | 64.986... 64.980 |
| Crankshaft bearing clearance, radial | mm | 0.020... 0.046 |
| Max. permitted runout at center crankshaft journal | mm | 0.150 |
CONROD BEARING JOURNALS SPECIFICATION
| Ground sizes of conrod bearing journals | ||
| Stage (b) | mm | 49.9820... 49.9924 |
| Stage (r) | mm | 49.9925... 50.0020 |
| Radial conrod bearing play | mm | 0.025... 0.070 |
CRANKSHAFT GUIDE BEARING SPECIFICATION
| Grinding stages, crankshaft guide bearing | ||
| Original | mm | 24.025... 24.064 |
| Crankshaft axial play | mm | 0.060... 0.250 |