I know you've got some miles and want to do the job right but, were you losing any oil before you took it apart? I know I wouldn't want to rebuild a motor and put parts back in with a ton of miles, just asking.
BTW, it's obsurd that the manufacture doesn't sell these or seem to expect people to rebuild the motor. These cars are so well built and could really last a person a very long time with the right work.
330i ~ BMW Perf. Susp. ~ M3 Front susp ~ BMW Perf Exhaust ~ 3.38 lsd ~ SF71 Alf CSL reps ~ Continental Extreme DWs ~ AA Tune ~ WTB: e93 M3 Fron Sway Bar