Q: There is rubber stuck in serpentine pulley grooves

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Tensioner pully broke so I replaced it and got a new belt but I noticed on of the bottom pulleys has rubber lodged in the grooves.

My car has 160000 miles.
My car has a manual transmission.

You will need to use a small tool to clean out the groves or the new belt will get damaged or slip and come off. If you cannot get the grooves cleaned then pulley will need to be replaced.

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