Crankcase
12
Mechanical system
Introduction of New Generation of 4-Cylinder Inline Engines, OM 651
q
General
When engine 651 was developed, the design of the
crankcase was based on an overall concept with opti-
mized spatial features. Accordingly, the gear drive
with
the oil pump drive and the Lanchester balance
shafts are positioned on the output side. The cast iron
crankcase is manufactured by sand casting.
The new design concept provides the following advan-
tages:
•4 cm shorter crankcase compared to predecessor
version
• Improved pedestrian protection through
positioning of gear drive and
camshaft drive on
output side
• Universal timing case cover for adaptation to
various transmis
sion models
Crankcase
1 Crankcase 2 Oil spray nozzle shutoff valve
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