6v92 froze crank & can't figure out why.

[skip102dl]

We have a frozen motor here. Crank tried to weld itself to block. We can't figure where or why it lost lubrication. Rod bearings & pistons all look good. Motor in 84 Bluebird and was supposed to have been rebuilt 5 yrs. ago. Pickup tube & screen seems fine. Any help or advice from actual experience greatly appreciated! Thanks, Skip Sahler

[bus05eagle]

did it get any water or anti freeze in the oil

[Moof]

Overfilling the oil can cause it to foam.  The air in the foam is a poor lubricant.  Just a thought.

[luvrbus]

it could be from the last rebuild that the line bore was not checked or some anti freeze has got in the oil 92 series hate the stuff and will spin the main bearing and could be no one has ever changed the main bearings they need to be changed every 100,000 miles also if it was ran low of oil