Crankshaft Bearings Wear Out Due to Oil Leakage || Grinding Crankshaft Rod Journals on Crankgrinder

The main reason crankshaft grinding is done is because the crank wears over time. Over thousands miles the end play between the crankshaft and the bearings increases. ... When you reduce the size of the bearings you reduce the overall surface area too. Less surface area equals less friction and better engine performance.





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