I am going out on a limb & say that the clearance was way too tight (& maybe the psi dropped when they wiped shiney & clearance increased it). Since the crank looks good I'd get some .001" under bearings or some same size bearings w increased clearance. . No way should they be wiped that shiney in that (brief) amt of use. Sumpin ain't kosher. NPT threads need sealant & w yours being a bit loose use the thickest sealer you can find. Permatex #2 in the toothpaste like tube is good.