VANOS doesn't rattle at start-up, if anyone wants to hear VANOS rattle in YVR give me a shout, mine's ****** awful. ugh.
I'm sure that anything that simple to replace can't possibly go wrong….BMW would make sure of that. Still, I'll add it to the list of things I should do. I have some rattle when I don't replace my oil at reasonable intervals.
Maybe I'm too cynical tonight :P.