Valve Assembly - Mercedes-Benz OM 651 Service Manual

Valve assembly with hydraulic valve clearance compensation
The valve assembly was modified with the aim of opti-
mizing friction and reducing the moved masses.
The camshafts control two intake valves and two
exhaust valves per cylinder. This valve timing system
uses low-friction roller-type cam followers with
hydraulic valve clearance compensation.

Valve assembly

1 Slide rail
2 Timing chain
3 Camshaft drive gears
4 Intake camshaft
5 Exhaust camshaft
– This printout will not be recorded by the update service. Status: 09 / 2008 –
Introduction of New Generation of 4-Cylinder Inline Engines, OM 651
Valve assembly
6 Sensor wheel with orifice plate
7 Roller-type cam followers
8 Hydraulic valve clearance compensator
9 Chain tensioner
10 Timing chain drive gear
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