Vac pump destruction / mystery

[monte442]

I've seen bad finishes on crank hurt bearings. Was every plug and all cam bearings removed from the block when it was cleaned,was it cleaned with brushes in all of the oil galleries ? Are all of the oil pump mating surfaces true and clean ,pick up welded and sealed to pump ? If it is pumping aerated oil through the system it will never maintain an oil wedge between the crank and bearings.