The lock is still on one bearing and not on the other. Also you can see wear the one with the lock gone has spun were the other hasnt . Tell me how you get one bearing that has spun and one bearing that has a good lock on the same main lobe of the crank ? Im guessing motor started nocking so bottom bearings were replaced so car would run long enough to sell. Just my opinon other ideas are welcome but before you say the bearing was put it backwards there for collasping the lock you would be wrong . The top bearing has spun before just not with the bottom half thats in the motor.
