i have a 89 2.5 block without balance shafts
i was taking the main caps off to replace the bearings and i noticed that cap #3 had the grove in the center of the bearing worn away completly. but the bottom bearing didnt look bad to me the grove was stil intac. i know the balance shafts where removed and the engine was ran for 30,000 miles then dissasmbled.
could the wear be caused buy runing a 2.5 at higer rpms with no shafts ?
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