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Are you shure you're selecting the correct joint for the crankshaft? If you created a rigid joint just before the crank joint, the default joint type will be rigid. You will have to select rotative. You can also animate the joint or animate the model from the right click menu on the joint. Also, if there is any interference between the parts in the joint,or the rest of the model, the joint will animate, but the model won't, and there is no indication as to why given...
Did you modify your post?I still see the first photo...but like 'toolznthings' says...I can't see see the other 3.All I see is the symbol (similar to the European 'no parking' sign).
Sorry for all the issues from me on this!