Hi my e6 has a damaged main cap , how, when, why, the hard facing has been chipped off one side of the cap where it bolts onto the block. when the bearing was replaced and cap bolted up the crank kept locking up , on investigation they discovered the damaged cap and a crack in the block that opened and closed as the thread went past it. now they say it was that way and they did not damage it by bolting it up and trying to start it with an incorrectly positioned main bearing , correct me if wrong but if it was pre existing then wouldn`t the old bearing show signs of this , would there have been some kind of noise? and why only one side of the cap ,one would think that if it was that damaged that it locked the crank up that side would of been virtually flappy in the breeze. his remedy was to file down the damaged area and shim the difference to make it equal with the other side. would it be worth while to have the crack welded up or should the block be replaced thanks