drivebelt rubbing on timing chain cover

[dlee]

drive belt rubbing on timing chain cover. it is not constant there is just marks on the timing chain cover. any ideas what could be the cause?

[Tradewind]

Tell me when you find out, my car has them as well, quite significant marks with plenty of rubber left behind

I suspect the tensioner spring is slightly weak due to age, it certainly doesn't occur on most but on a few only. I have not noticed any adverse effect on belt or this issue causing any other problem, but it certainly takes your eye when you are having a look around your motor.

Other brands of cars - some in particular, have auto tensioners that weaken significantly in just a few years requiring semi frequent replacement.

[dlee]

yeah when i saw it i was shocked never ever seen any car have that problem. yeah my drivebelt looks perfect i was reading the h6 repair manual theres a certain mark the tensioner goes past which is like a indicator and it tells you if ur tensioner is gone or not seems to be ok though