Idler Pulley/Belt issue

2015 Tundra 4.6L. Belt tensioner and belt were replaced around 10k miles ago. While doing my latest oil change I noticed a black scuff line on the tensioner pulley and a couple small frayed spots on the back side of the belt. I can't remember if the pulley was originally black and the finish is wearing off or if this is rubber from the belt being transferred to the pulley.


I've attached a photo for reference.

Any ideas if this is normal would be greatly appreciated.

 

Any noise coming out of it?

 

No noise whatsoever

 

I wouldn't worry about it. Mine looks like that too. The belt looks good. If the belt had a wear streak that would be something.

 

The marks on the pulley don't correspond to any marks on the belt. I think you're good to go.