In January I put a new alternator and idler pulley onto one of these. One month later and probably only a hundred or so miles and the belt ripped itself apart and pulled off the inconveniently close crank sensor plug. I towed it in and fitted a new belt, I could not see any reason for the failure and put it down as one of those things, or maybe I had misaligned it on a pulley (not very likely, but always possible) Fast forward 4 months with very few miles and the belt has shredded again, but down in Dorset, luckily the elderly lady owner has breakdown cover and they fitted a new belt, he suggests that the alternator must be the cause of trouble, but why? it feels perfectly ok and everything looks lined up. Looking online I can see that auxiliary belt failure on these seems to be a common problem, sometimes taking the cambelt with it, yet no one that I can see has an answer as to why they are failing.
So, has any one got any good ideas? (apart from a layby and a match)
(I replaced the original alternator and idler pulley because they were noisy)