Can’t figure out why my new pulley is doing this with a new belt

[iboughtatahoe23]

Would happen on my old one here too

 

[mikez71]

Was your water pump pulley clean when you replaced the belt?

 

[iboughtatahoe23]

Was your water pump pulley clean when you replaced the belt?

No clue how to check, or if it is bad, how to change it. I know it’s way harder than a serp belt.

 

[mikez71]

well i meant when you installed the new pulley, if you happened to see if the water pump pulley had residue on it as well. It could be transferring from that pulley onto your new idler. Water pump pulley is the large pulley below the idler you replaced that also rides on back side of belt.

 

[iboughtatahoe23]

well i meant when you installed the new pulley, if you happened to see if the water pump pulley had residue on it as well. It could be transferring from that pulley onto you new one. Water pump pulley is the large pulley under the idler you replaced that also rides on back side of belt.

So what am I looking for again if the belts are rubbing against each other or something

 

[B-train]

It's just a wearing the paint off.. pulleys used to have a non-painted belt area. Manufacturers have made the process easier for them and just paint the whole thing. Nothing to be worried about.

If it was driving a waterpump, then the paint can cause slippage and noise. Pretty common on 8.1L replacement pumps. I've had to emery cloth off the paint on generators because they would squeal, slip, and cause the belt to get super hot.

You could remove it and sand off the paint if it makes you feel better about it.

 

[Doubeleive]

it's going to wear eventually that's just a coating, how fast it wears I don't know. Last one I had on wore out in nothing flat the current one has taken at least a couple years to get like this

 

[mikez71]

looks like rubber residue from old belt to me. either way, i agree, dont worry about it!

 

[OR VietVet]

Not to worry and it looks like the wear pattern matches where the lettering is on the belt. Drive it, should be fine.

 

[Doubeleive]

I think had your design before and then I purchased this one, less concave.