Hi all, this is my first substantive post here. Backstory, I picked up a 2009 4.8i Sport knowing it smoked at idle. I took the easiest route first, replacing CCV diaphragms, then valve cover gaskets.

When I got to the valvetronic motors, I found one with two missing screws, one loose screw, and one that was completely cross-threaded. I believe this incorrect mounting led to play along the axis of the valvetronic worm gear, and caused chipping on the gear faces of the eccentric shaft. Picture attached.

I decided to purchase the camshaft fixture 11 9 470 and related pieces, as well as a used cylinder head off a donor N62. I swapped the eccentric shaft into my engine successfully. The job was actually quite fun, given I already had the cylinder head covers off.

I did the valve stem seals while I was in there, using the AGA tool set. I won't expand on that, because it's off topic.

Here is the list of special tools needed, which I assembled from TIS:

Camshaft/Eccentric Shaft Bridge:

11 9 470 - intake camshaft and eccentric shaft bridge (tool I purchased included all the accessories listed below)
11 9 472 - bearing bracket to intake camshaft alignment piece
11 9 473 - knurled fastener - main
11 9 474 - knurled fastener for securing tool 472 (L shaped) to bearing caps 2 and 3
11 9 475 - "centering sleeves" for aligning special tool 472 (L shaped) to bearing caps 2 and 3

Valvetronic Spring Installation/Removal Tool:

11 9 480

Valvetronic Spring protector sleeve:

11 9 490 *** See attached photos, I purchased some generic nylon spacers found in the specialty hardware section at my local Home Depot

Camshaft Alignment Tools:
11 9 190, 11 9 460, 11 9 461, 11 9 462, 11 9 463 (Standard kits include all of these tools)

Parts:
11377615379 - needle bearing for eccentric shaft (4)
Eccentric shaft position sensor (I put new ones on both sides, you might re-use yours)
Upper timing case gasket
Vanos solenoid seals (might as well while you're in there)
Cylinder head cover gaskets, and everything else you would do as part of a cylinder head cover replacement.

I'm not sure if I have any brilliant observations to share, it was all relatively straightforward and well documented in TIS.

If anyone has questions, feel free to ask.

Attached Images