The camshafts are responsible for opening and closing the valves in time with the movement of the pistons. Sometimes the lobes can become worn or scored, necessitating a replacement of the entire shaft. Performance options are also available with more aggressive cam profiles that allow increased lift and duration.
The Valvetronic actuator unit sits on top of the cylinder head and seals against the valve cover. The gasket plate should be replaced any time the Valvetronic unit is removed or when work is done on top of the engine (valve cover gaskets, spark plugs, ignition coils, etc).
This item fits the following BMWs: 2006 E90 BMW 325i 325xi 330i 330xi - Sedan 2006 E91 BMW 325xi - Wagon 2006 E60 BMW 525i 525xi 530i 530xi 2006-10/2006 E85 BMW Z4 3.0i Z4 3.0si Show More Show Less