Hello all, About 6 months ago I suffered a pulley collapse on the auxiliary belt which you helpful people helped with. The car has since been repaired, but has been suffering with a rattle since. I have managed to locate the rattle, it is the aux belt tensioner moving, today I replaced the tensioner but the rattle is still there. I checked the tensioner and it is still chattering away. I have had a quick google of the issue and the general consensus is alternator pulley. I have read that the pulley only engages in one direction like a bikes rear wheel. I have removed the belt and turned the pulley in both directions, there is no difference in the feel of it. If you can shed any light on this it would be greatly appreciated.