DI Diesel Engines M57/M67 - Common Rail Sec. 2 P.6
Course contents/Background material
Cylinder head
The cylinder head represents the upper limit of the combustion
chamber. It accommodates the necessary valve timing elements
(valves, injectors, camshafts).
The following features apply both to the M57 and M67:
• Cast aluminium, cast timing case
• Coolant flow from exhaust to inlet side
• Central, vertical upright arrangement of common rail fuel
injector
• 4-valve arrangement (as on M47)
• Exhaust ports combined in cylinder head (as on M47)
• Cylinder head bolts not accessible with camshafts mounted in
position
• Glow plugs (heater plugs) arranged on inlet side
• Leak-proof arrangement of oil galleries/holes (e.g. for
hydraulic valve lash adjusters)
M57-specific features
• Coolant outlet arranged in centre between cylinders 3 and 4
• Inlet port configuration (1 swirl/1 tangential port) adapted to
common rail injection system
1 - Exhaust ports
2 - Fuel injector
3 - Swirl port (inlet)
4 - Tangential port (inlet)
5 - Glow (heater) plug
Fig. 15: Inlet port configuration - view M57
© BMW AG, Service Training
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