A valve is not a valve.
Example: While setting the valves may appear to be the same across all engine families, that is only in theory. Real world is a different story. The procedure for doing valves on a M110 6 cylinder and a OM617 diesel, while similar, are not 100% identical.
Tell us what you are working with if you really want to get a answer that applies to your situation.
. It's either a '79 or '80 300D engine in a '77 chassis. NOT turbo. Definitely 123 series. Sturdy car and love Mercedes to pieces and sometimes it's to pieces that I have to love these. I have done a lot of TLC and the seats are pretty with a nice sound system and paint job. Electric all around. Really great car.
I have to admit, I am not that versed at diesel. I have yanked Volvo, Chevy and my old Porsche motors out, but I didn't get all that involved in my Mercedes diesel engine work....didn't have to until now. And this is my second one. I sold the last one because I had too many cars....missed it and went and got another one. I even tried to buy back my old one but they took it to Florida.
Regardless, I have 5 sets of exhaust lobes and 5 sets of intake lobes. I used dieselgiant's steps and it was really great. I could feel the crankshaft turning easier the more lobes I cleared. But that number five...I spent more than an hour wrenching on it and it just spun and went nowhere and I am sure that it is stripped. My back was killing me on that one. My family is used to me taking stuff apart and putting it back together again...and have it work. They just kind of ignore my projects.
So, now I have to figure on releasing pressure evenly on the camshaft, as I have broke one before by not cross-sequencing the release and then figure out how in the hell I am going to replace that stripped piece. I mean before when I did my Chevy seals, I used my valve spring compressor after I moved the valve up and stuck a bunch of nylon rope, instead of compressed air, in the plug well so that I wouldn't lose any pieces. I have to read my book on this one.....after I find it.
Any tips are greatly appreciated.