Quote Originally Posted by Gar
These seals fail around 60k they dont make noise when gone you simply lose torque between 1k-3k rpm

Common leak spots on the m54 are rocker cover and oil filter housing

http://www.i6automotive.co.uk/bmw-double-vanos-kit/
Cheers Gar! Would you reckon the vanos would be an easy enough job to do or better off left to someone with a decent bit of experience? Oil filter housing was leaking when I got the car so that was the first job that was done on it. Checked the cars service history and the rocker cover gasket was done at around 100,000 miles but it looks like it was done using heaps gasket sealant