Schulungs- und Informations Programm BMW Kundendienst M42 Motor
 

I don't think this has been posted here yet, it's a video on Youtube about the M42 engine by BMW themselves (in German, CC subs available).

https://www.youtube.com/watch?v=ykOlgpnYMdg

Topics discussed in the video:
- Differences with the M40
- How to disassemble the cylinder head and adjust the timing
- Advantages of the new ignition system

There's also mention of tools:
11 3 260 low pressure camshaft bearing ledge fixation device
11 3 250 valve lifter securing tool
11 3 240 camshaft positioning device

I have no idea where to get these tools but they look like they make the job a lot more easy.

The uploader has a playlist with other car-related video's of which many are about BMW, check out "Der neue BMW 316i compact". :)

https://www.youtube.com/playlist?lis...o2PRrNHWl7dbDh