Crankshaft - BMW M57 Service Training

DI Diesel Engines M57/M67 - Common Rail

Crankshaft

The crankshaft converts the linear stroke motion of the pistons
into rotary motion.
The following features apply both to the M57 and M67:
• Threaded connection on front end of crankshaft designed as
4-hole mounting (replaces central bolt)
• Thrust bearing designed as constructed bearing
M57-specific features
• Material C38 mod.
• Bearing surfaces and radii inductively hardened
Main bearings (as on M47)
• Thrust bearing arranged between cylinders 5 and 6
• RPM signal taken from last crankshaft web, incremental wheel
screwed on crankshaft web
Forward direction
1 - Cylinder 1
2 - Cylinder 6
3 - Incremental wheel
Fig. 20: Crankshaft drive - view M57
© BMW AG, Service Training
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Course contents/Background material
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KT-3678
Sec. 2 P.12