DI Diesel Engines M57/M67 - Common Rail Sec. 2 P.18
Course contents/Background material
Chain drive
The rotary motion of the crankshaft is transferred to the cam-
shaft via the chain drive. In this way it defines the interaction
between the stroke motion of the piston and the movements of
the valves.
The following features apply both to the M57 and M67:
• 2-piece chain drive
• Tensioning rail made from aluminium die casting with plastic
slide lining
• Bushed roller chains
M57-specific features
• Chain drive 1: From crankshaft to common rail high pressure
pump
• Chain drive 2: From common rail high pressure pump to
camshafts
• Double-acting chain tensioner
E I
1
2
3
4
5
7
1 - Camshaft
2 - Chain tensioner
3 - Tensioning rail
4 - Common rail high pressure pump
5 - Crankshaft
6 - Guide rail
7 - Oil pump
Fig. 24: Chain drive - M57:
© BMW AG, Service Training
6
KT-3681
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