[Shaun @ Tru6]

Got some work done on the motor tonight. A week ago my friend Chris grabbed the flywheel and shook it and sure enough, the crank went kerchunk so for the last few days I've had dreams of a cracked block from thrust bearing failure. Given the relative minimal machining of the bearing down to copper, I think I'll be OK. I'll pull the crank out tomorrow or over the weekend and get it to a machine shop next week.

Looks like someone was welding inside the motor.