I am turning the engine by the PS bolt. There may be some slack in the chain, I can kind of wiggle the chain on the sprocket but I can't deflect the chain by pressing on it like I could a bicycle chain.

I was thinking that I might have installed the offset key upside down? Would that be really bad? I have only turned the engine over about a dozen time by hand since installing the new key - it's all still apat so I could go back in and turn it around pretty easily.

What I am trying to describe is that as I turn the engine. the chain will move smoothly with my strok except in a couple of places where I will turn the engine, and the chain won't move for a split second, then it will jup forwad and catch back up with the stroke.

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Current Mercedes
1979 maple yellow 240D 4-speed

Gone and fondly remembered:
1980 orient red 240D 4-speed

Gone and NOT fondly remembered:
1982 Chna Blue 300TD

Other car in the stable:
2013 VW Jetta Sportwagen TDI / 6-speed MT