Vacuum Pump Assembly ???

Anyone knows what a Vacuum pump assembly is...I got my 02 745i in for service for an oil leak , which they thought was just the valve cover gasket. Got a message today from my SA that the vacuum pump assembly is broke and that's where the leak is coming from..He said that the vacuum assembly has something to do with the timing chain..

Can anyone clarify this for me...

Thanks...

i have no idea about your question but i assume your out of warranty?

From Wikipedia article on Valvetronic:

It is important to note however, that the throttle plate is not removed, but rather defaults to a fully open position once the engine is running. The throttle will partially close when the engine is first started, to create the initial vacuum needed for certain engine functions, such as emissions control. Once the engine reaches operating speed, a vacuum pump run off the passenger side exhaust camshaft (on the N62 V8, exhaust cam on the N52/K) provides a vacuum source, much as a diesel engine would, and the throttle plate once again goes to the fully open position.

http://en.wikipedia.org/wiki/Valvetronic

Here is the part...
http://www.realoem.com/bmw/showparts...78&hg=11&fg=45

Thanks for the response...

Anyone knows if this is an easy fix ..