The only thing that I can see that may have caused my chain to break is compressor surge, my car suffers with compressor surge with the setup that I have , and I remember when mine broke, that I was at a point that the car would surge and there is alot of jerking involved when it does surge, to me the has to put a strain on the internal parts IMO. maybe I am wrong please feel free to comment on this because I can't find another reason for it breaking, Bill and the owner at Weber (cant remember is name) are great ppl to work with, I have nothing but good things to say about them. A+ in my book.
