Congrats on the new rig, especially w/ some decent mods. If you ever decide to finish the breathing upgrades, you can swap on the intake manifold from older V8's and get the same benefits for a fraction of the cost for the $$Dinan$$ unit, then you'd only need another software upgrade to complete the job.
Welcome to the forums, there is a lot of information on here. I always like to mention that
www.e38.org will have a lot of the same maintenance information we need here. The M62 (non-VANOS) and M62TU (VANOS like you have) has been used in 540's and 740's for about 6yrs before the first X5 was ever made, so all the problems have been discovered, fixed and compiled already on the site.
Take care.
__________________
650hp 10 X5///M - Stage 2, Vibrant 1794's , gutted cats, custom intake, AC Forged 22's
325hp 98 BMW 740iL -
///M5 6spd,
www.bavengine.com w/ Performance Option, electric fan, CF intake tube w/ heatshield, Mag 14816 w/ notched bumper, Bilstein/H&R Stage II/Powerflex
600+hp 02 Harley F150 - MHP900 Stage 3 engine, KB2.3, 8# lower, 60# inj, Walbro FP's
135hp 01 TL1000R - M4 full exhaust, K&N, Yosh box, -1/+2 gears, 2CT's