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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 - 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:

KT-3681

BMW M67 User Manual

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