One of the threads I discussed how a banjo bolt gets over torqued and distorts the horizontal drill passage . Banjo bolts are drilled verticle and then horizontal ,just hold the bolt at eye level and view the horizontal passage ,if it is not perfectly round then it is twisted . This will cause a restriction in brake fluid or fuel flow. If the tech gets lazy and doesn't replace the copper crush washers ,when he tightens it ,it's over torqued .