I would have to concour with Ken300d and TXBill, just the other evening I heard the exact same sound coming from same area. I put my hand on the air cleaner housing and the sound quieted up. But, instead of the mounts or brackets being broken, one of the three 10mm nuts that hold the housing down to the bracket had either loosened or I had not tightened completely last time I was in there. Thightened her up and quiet she is again!