I was reading "Bimmer" magazine this month @ their concerns w/ the ZHP pkg, particularly when it comes to the chatter @ 2000 to 3000 rpm from the camshaft. Does anyone own a 2004 w/ ZHP option pkg. (manual shift) who has successfully dealt w/ this problem? I'm thinking @ buying one, since I now have a 325e (1985 vintage).
the Vanos rattle is a hot topic check the e46 Roadfly boards. LOTS of discussion there... Before you buy one, dig deep into this topic. It has been a real headache for some ZHP owners.
Just rebuilt my son's 330ci zhp. Had 86k miles and was radling. Replaced 'o' rings, run like a champ now. It doesnt apear to be a problem like the cam bolts on the s54 m3 engine.