So your saying that the bearing connecting the con-rod to the crankshaft might have melted together? if so, how could i be able to move the piston up and down at all? also, right where the con-rod connects at the bottom, there is circular steel circles on each side of it and i think they connect to the con-rod, but anyways, on those steel circles directly parrallel with the con-rod are some heat/burn marks (blue,purple,yellow all mixed) and they are only in that one spot. it's almost as if part of the explosion from the piston up top get's down to the con-rod. or it might be from the bearing getting over heated and causing the connecting cylinder attached to the con-rod to burn. that makes sense.....