I recently had a mechanic get rid of header bolts that had broken off and rebolt my header back on. When I got home, I noticed if I turned my steering wheel all the way either way while moving, there was thumping noise and the car repeatedly bumped with each thump. The sound always comes from the engine bay area in front of me. Could he have screwed something up? I put new wheels on as well but they were the same size as my old ones and they are low profile tires so I don't think they are rubbing. Help is appreciated!