M271 Engine -
Aluminium cylinder head with variable valve timing
Made from high-strength aluminium alloy, the cylinder head in all versions of the new Mercedes engine has 16 valves and double overhead camshafts. Unlike in the previous Mercedes four-cylinder engine, both camshafts are adjustable and have variable valve timing. A newly developed vane-type adjuster with integrated control valve ensures optimum valve timing at all times. This has a favourable effect on torque characteristics under full load as well as on fuel consumption and exhaust emissions. The valves are controlled by means of cam follower with roller mechanism and have a maintenance-free hydraulic valve lifter.
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'03 c230K Sedan