So, I did a job for a friend and replaced the leaking head gasket on his '87 190d 2.5 non turbo. I am a diesel tech but work on large engines so not new to diesels.

However, I have never been this deep in a mercedes. Got everything back together and it doesn't seen to run quite right like the pump timing is retarded. I marked everything and then put it all back together but obviously something is not the same. The head was not machined, injectors were tested.

I've searched for info for quite a while but I don't even know if the engine is a 602 or a 617 or what.

Lets assume I am starting from zero, how do I get the cam, crank, and pump all in time so it works like it should?