Valve assembly Mechanical system 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 6 Sensor wheel with orifice plate 7 Roller-type cam followers 8 Hydraulic valve clearance compensator 9 Chain tensioner 10 Timing chain drive gear 17 Introduction of New Generation of 4-Cylinder Inline Engines, OM 651 q – This printout will not be recorded by the update service. Status: 09 / 2008 –