Hi,
Think I have a problem with the timing belt on my 93 Cosworth. About 12 months ago the timing belt on my cosworth failed on the motorway and bent all the valves in the head. It turned out that 4 teeth had sheared off the belt, at the time this was put down to a dodge pair of alloy vernier pulleys which seemed to of worn quite badly.

I had the car repaired and fitted a new pair of quaife steel vernier pulleys (the peg type pulleys) a new tensioner and a gates timing belt. I removed the timing belt this weekend as I'm going to be changing the cams over Christmas and found that the belt was starting to fray at the the root of the teeth (where teeth join the belt).

This belt has only covered approx 8K in the last year and I'm a bit concerned that it has started to fray at the root of the teeth. If you bend the belt back on itself you can see that the teeth have started to crack where they join the belt, it all sounds a bit to familiar to the problem I had 12 months ago!!

The quaife pulleys do not appear to of worn apart from the black coating on the teeth been worn off and the tensioner has no play in it. I checked that the tensioner had been tensioned clockwise and it had so the belt isn't touching the thermostat housing.

Does anyone have any idea what could be causing this or where I should start looking?
Is it possible for the crank timing belt pulley or the dizzy pulley to wear and cause this problem?
Any help would be appreciated as I don't want to be changing my belt every 8K miles if I can help it.

P.s. Just out of interest how often do you lot change the timing belt on your Cosworth's?