Is this 220d tensioner bad? Also Injection timing?

[junkscouts]

Hi All,

I’m working on a ’64 190D which has a 220D motor in it of unknown (as yet) year. The timing chain broke (no bent valves) so I’ve put in a new chain as well as all new guides and sprockets as well as a new pre-chamber which I found was bad when I pulled the head.

My question is how does the 220D tensioner work? The manual from the 190D says the tensioner functions from oil pressure and you have to bleed it, but the 220D tensioner doesn’t appear to use oil as far as I can tell by looking at it. I realize now I should change the tensioner anyway, but is it just a spring in the tensioner or is there oil in there? It seams very slack right now, I can easily push the tensioner back in with my finger and it is not keeping the chain tight at all when I turn the motor over by hand. Needless to say I won’t try and start it until I get that chain tight, but any help would be appreciated.

Also I was wondering about the injection pump timing. There didn’t seem to be any marks for lining up the sprocket (and nothing in the 190 manual) and the old chain was completely off so I just put the new chain on lining up the crank and cam marks, but now I am wondering if I will have to pull the pump to get the timing right? If that’s the case can someone give me a quick description of how to do that? ie lining things up, I can remove the pump easy enough.

My last question is where on the block are the numbers stamped? When I looked up the new tensioner it wants to know “Engine Range: From 10-166609” so I’m wondering where I find those numbers?

Thanks for any and all help.

Regards,
Sven