Originally Posted by Patrick-Irish

Well I am getting a faint knocking noise from the engine under acceleration. Was thinking it could be VANOS as I know they have a tendency to become noisy. Also I put Mobil1 in recently and I've heard these knocking sounds reported by others when they did they same. Then I thought timing chain. There's 110k miles on the clock and I've only driven about 10k of them so I don't know if the chain was ever done. I have also heard that the timing chain doesn't need to be done on these, and maybe that explains why the Bentley manual doesn't cover it while other engines are covered in the same manual. Still I'm wondering why the chain doesn't need doing on the M62.