1990 245 B230F

I noticed there is a slot for a keeper on the crankshaft pulley the one with the accessories are driven from there was no keeper on this pulley. The pulley for the timing belt does have a keeper. I noticed what looked like some marks where the shaft may have turned inside the pulley. I have looked everywhere and can not find where it. if it was there to begin with. I used an impact wrench to loosen the 24 mm bolt and it really had to work on it to get it loose. I hope to finish this today but it is looking doubtful. Any help is appreciated.

 

The belt sprocket on the crank should be keyed. If the key (which is cast into) is broken, there is no completion until you get a new sprocket.. There is no way to index the belt otherwise.
Washers on either side if the sprocket flair away from the belt.
ED7

 

Well, paraphrasing Walt Kelly's comic strip character I have met the enemy and it is me!

ED7, Thanks for setting me straight, hopefully I can finish Sunday.