Bookmarked this. Invaluable info. I don't have any smoke from tail pipes since replacing the two ccv diaphragms. But bought a 2005 x5 4.4i (n62) a couple months ago from a dealer in Houston with 109,000. As such got no maintenance history on the truck. Looks like a fairly nice vehicle and drives well besides a few normal suspension needs on a used BMW.

Anyway, did the newer n62's come with the updated valve seals? Reason I ask... I am going to be doing upper timing cover gaskets (I bought lowers too, but really don't want to mess with the Jesus bolt). Also going to be doing most of the rubber seals at the same time along with valve cover gaskets and alternator bracket seal (wtf designed that?). Don't want to have to re-do all that in the event of valve seal failure.