XUD cam belt query!

[ally406]

If you straighten it all up, turn it over by hand, you can usually see where it is starting to run wide. If the above suggestions don't work, one other thing to check for is any grime build-up on the block face where the tensioner and idler bolt up. I had one belt I was scratching my head with for ages, giving the block a good clean with some WD40 and wet n dry fixed it. I did this after reading a similar story elsewhere.