[COLVERT]

Originally Posted by Shapfell

Good point. The problem was, the belt was slapping about before the alternator went pop, which was before the pulley came off. I've DTI'd it for concentricity and its OK, so maybe it has got an internal problem. It was one of DMGRS ones so it should be OK.

If it was flapping about with the old belt and doing the same with the new belt then more than likely the belt can be discounted as the problem.

It sounds that there is an intermittent load being applied to the the belt to make it flap.---( ie. Both belts. ) Are you sure as well that the tensioner is working correctly ??---That a steady load is being applied to the belt all the time ??

It could be that one of the other items that's being driver by the belt is close to seizure.--Idler roller, alternator etc.