11 21 Crankshaft and Bearings (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.

GUIDE BEARING JOURNAL NUMBER (7) SPECIFICATION

Ground sizes of main bearing journals		Guide bearing journal number 7
Original (identification mark S/1)	mm	64.999... 64.993
Original (identification mark S/2)	mm	64.992... 64.987
Original (identification mark S/3)	mm	64.986... 64.980
Crankshaft bearing clearance, radial	mm	0.020... 0.046
Max. permitted runout at center crankshaft journal	mm	0.15

MAIN BEARING JOURNAL NUMBER (1) SPECIFICATION

Ground sizes of main bearing journals		Main bearing journal number 1
Original (identification mark S/1)	mm	55.989... 55.983
Original (identification mark S/2)	mm	55.982... 55.977
Original (identification mark S/3)	mm	55.976... 55.970
Crankshaft bearing clearance, radial	mm	0.020... 0.046
Max. permitted runout at center crankshaft journal	mm	0.15

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 (identification mark S/1)	mm	55.999... 55.993
Original (identification mark S/2)	mm	55.992... 55.987
Original (identification mark S/3)	mm	55.986... 55.980
Crankshaft bearing clearance, radial	mm	0.020... 0.046
Max. permitted runout at center crankshaft journal	mm	0.15

GRINDING STAGES, CRANKSHAFT GUIDE BEARING SPECIFICATION

Grinding stages, crankshaft guide bearing
Original	mm	24.020... 24.053
Stage 1	mm	No machining possible
Size 2	mm	No machining possible
Crankshaft axial play	mm	0.060... 0.250
Friction coefficient of crankshaft	Nm	2 to 2.5

GROUND SIZES OF CONROD BEARING JOURNALS SPECIFICATION

Ground sizes of conrod bearing journals
Identification mark (b)	mm	49.9730... 49.9834
Identification mark (R)	mm	49.9835... 49.9930
Stage 1	mm	No machining possible
Size 2	mm	No machining possible
Radial conrod bearing play	mm	0.025... 0.071