There is a guy here who pulled the M62 outta his 4.6is to fix all the leaks, you might want to search for that thread. He did lots of stuff and a lot of members chimed in on things to do. Lots of pics too. Neat multi page thread.

Not everything will carry over of course but a lot will be applicable.

Off the top of my head...

So yeah, alt bracket seal.. does the oil filter housing have a gasket that leaks like on the 6cyls?

The oil pan gaskets on the 6cyls are hard to do in situ, not sure with these engines.

Do these engines have the valley pan coolant leaks?

Rebuild VANOS unit with updated seals and the valve cover/spark plug gaskets along with it?

All new motor mounts and the tranny mount too, those are hard to change with the engine on.

__________________
04 X5 3.0i auto
03 X5 4.6is