biffo134

Hello again, thanks for the replies, it is not a fan belt noise, it sounds like its coming from the top of the engine where the injectors are (in that area)I was visiting my brother -in -law yesterday who worked on engins years ago but as so as he popped the bonnet the noise stopped, quite uncanny, but on my way home it started again.

good morning one and all, I have a 316i that makes a kind of humming noise when running, its like a high pitched sound but as soon as I turn off the engine it stops immeadiately, any ideas. thanks...john