Many people install the crankshaft and never check the endplay. If endplay is too tight or too loose, you could hurt the bearings or create unwanted friction in the reciprocating assembly. Always check endplay with the mains torqued to spec. Our crankshaft endplay measured 0.009 inch, which is fine. In general, if the clearances are less than 0.007 inch or more than 0.018 inch, problems may result.