Originally posted by bnoon:
Federal Mogul and Clevite replacement bearings are both better than the stock tin coated copper bearings.


Brad, the O.E. bearings used in the Duratec are not tin-coated copper. They are made by Federal Mogul and have a steel back with an aluminum alloy coating.

You can find good info on Federal Mogul's site here. . The O.E. bearings would fall under the "Aluminum Alloy (RA or A)" section. Practically all of the main and rod bearings used at Ford are of this construction.