450SL Camshaft

While changing chain guides on my 1979 450SL I decided to change the oil tube as well but the clip which holds the tube to the front cam bearing broke and a small piece went down into the cam bearing and wedged. I have tried picking at it and vacuuming it with a small pump but the piece is wedged pretty solid. Unless anyone has a suggestion on how I might get the piece out I am guessing that the cam bearing will have to come off. The chain and cam sprocket collar etc are off so is it possible to back off the cambolts sufficient to slide the front cam bearing off without actually removing the entire camshaft.
Thanks