Well, I've killed and rebuilt a motor or 2 over the years, and I've always had more luck when the turbos are cleaned. Your whole oil system is shared with the motor, so turbo bearings, oil cooler core, standard oil warmer, oil lines, cross block oil feed etc etc etc are all suspects where the last motor's bearings can be stuck.
I use http://www.oilcheck.com.au/ for my oil analysis, they are cheap, quick, easy to deal with and happy to explain results. If you see shiney in the oil I would take an oil sample, drop and replace the oil and filter and go easy on it until the results are back.
Sorry to be suggest bad news, but the sooner you find a problem the cheaper it is