Report Cambelt damage. in Engine/Ancilliaries Posted June 17, 2008 Could be a number of things mate. A stone or some sort of foreign body got flicked up there. One thing to do is hek to see if the belt moves backwards and forwards on the sprockets while the engine is running and then check it again with someone depressing the clutch. I had a quarter of an inch tear in mine last year only spotted it when I checked the alternator belt tension. It just so happened to be in line with the alternator at the time. What ever did it was no longer around but I was lucky to spot it.