So, I removed the vacuum pump and it was damaged but the bearings were thankfully still in place. The drive cam was also damaged however, so I am getting ready to replace that as well. I have put together the procedure as best as I can but would like some assistance from someone who has done this before as I do have a few questions. Thanks.


First you have to remove the Timing Chain Tensioner:
http://www.w124-zone.com/downloads/MB%20CD/W124/w124CD1/Program/Engine/605_606/05-7800HA.pdf

Then you remove the IP:
http://www.w124-zone.com/downloads/MB%20CD/W124/w124CD1/Program/Engine/605_606/07.1-8410.pdf

What is the Noise Encapsulation that I am removing the bottom part of?
The Installation Note says to lock the IP after removal. Everything else I've read says to do this before removal. Or is the thinking that it is not needed for removal, and it's easier to install the blocking bolt after removal.


Then you remove the Injection Timing Device:
http://www.w124-zone.com/downloads/MB%20CD/W124/w124CD1/Program/Engine/605_606/07.1-8014.pdf

What's with the Locking Pin, 40/11? Do you need the special tools to remove and install?
What keeps chain tension on the crankshaft if there is no tension on the Camshaft or ITD?
How much does this thing weigh and why is it not possible to remove the ITD without removing the IP anyway?


Then you Service The Injection Timing Device:
http://www.w124-zone.com/downloads/MB%20CD/W124/w124CD1/Program/Engine/605_606/07.1-8050.pdf

Is it a 2 piece sprocket/cam as depicted and bolted together with 40/12? I don't want to buy this part until I see it ($$$) as it was later changed to a one piece from what I understand.

Reassembly: How much can I rotate the sprocket for the IP to line up and not affect the timing? Or do I just choose the nearest spline?
The torque figures are all there but would you recommend using Loctite?


Then you put it all back together and go have a beer.

My car (built in 3/94) has only 165K miles on it and I would highly recommend everyone change out the VP before it damages the cam. Then you won't have to do this procedure at all!

I will be buying the Basket along with the IP Locking Tool and then listing them in the Tool Rental page when I'm done.

Thanks again.