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Yeah, good work. I have never seen bearing starving from sludge, and only 1 at that. BMW engines traditionally have strong oil system, so must have been multiple factors contributing to this. As OP mentioned, oil may have been added after the failure.
As a long time BMW engine rebuilder I will advice you to replace this crankshaft and not try to repair it. It is just not working so well with the long inline 6 crankshafts. These engines tend to be abused, so if you buy a used bottom end you are buying a cat in a box. It it were me I would buy a used CS, change the piston rings and the bearings(perhaps the oil pump too) and call it a day. If you need parts at wholesale prices just contact me, I will buy everything for you.
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05-27-2016, 08:38 AM
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