Well Mr BimmerM3inGA you've found an equally masochistic BMerphile! I still drive an M62TUV46 engine in my 4.6is with 130k miles. While it runs relatively well I know the writing is on the wall having destroyed another 4.6is when it's chain came loose. I'm a fairly mechanical guy having replaced a chain in my 89 mustang 30 years ago and I have most of the tools I'll need. I've yet to order parts but I intend to rebuild the VANOS and replace the timing chains and guides as well. Without going on further I'd just like to know that someone experienced like yourself is still alive and well. Let me know how you'd rate this job on a scale of 1-10 10 being forget the incredible headache and pay a professional instead. Also, how much time should I allow for this job?

Thank you in advance!

Robb