I want to see a video. Sometimes people mistake knocking for the true nature of an OM617.

Unless you live in a really cold climate, there is no reason not to run only 15W-40 oil. You don't need Synthetic. Running light oil in a Diesel will make them sound like they are knocking more than usual.

You can buy valve adjustment wrenches if you want. They are not too expensive. Get the valves right before you do anything else. Also, get some correct oil in there. Some people may disagree but I see no reason to run synthetic oil in an older Diesel engine. I don't run it in any of mine and I do not plan to. The engine was designed and ran on dino for many years. Changing that adds variables I do not wish to explore.

__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge