tow BMW 745i 2004 E65 N62B44 Engine Workshop Manual

Downloaded from www.Manualslib.com manuals search engine Valvetronic Motors
One Valvetronic motor is located on top of each
cylinder head towards the inside of the engine
“V”. The motors are capable of traveling from
minimum to maximum lift in 300 milli-seconds.
N No
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te
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:

The Valvetronic motor must first be removed in order to remove the cylinder head
cover. The eccentric shaft must be in the minimum lift position and the motor must be
wound out from the eccentric shaft. The worm gear could otherwise be damaged when
separating the worm shaft and the worm wheel as the eccentric shaft springs back (due to
the torque compensation spring).
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The Valvetronic motor worm gear rotates the
eccentric shaft clockwise or counterclockwise
at a very quick rate (1).
Due to the progressive “lobe” on the eccentric
shaft, this rotation positions the intermediate
lever (2) closer or further to the camshaft lobe.
N No
ot
te
es
s:
:

26
N62 Engine
1
2
Valvetronic Motor
1. Cylinder Head Cover, Cylinder Bank 1-4
2. Valvetronic Motor for Eccentric Shaft Adjustment
42-02-2943-22-28