Corroded engine pulleys

[plenty]

Is it worth replacing them if there is some surface corrosion?  (E.g. risk of accelerated wear to aux belt.)

[LotusLeftLotusRight]

I haven't checked mine, but I would be very surprised if there is any corrosion at the pulley surface in the groove where it actually makes contact with the belt. You could always just clean them up yourself, if they don't look nice.

[agentdr8]

Just to clarify, there's no aux belt, just a single serpentine that drives all of the accessories (and supercharger, if so equipped). 

Unless the corrosion is really bad, or closer to the center bearing on the pulleys or accessories, I probably wouldn't worry too much about it. 

[Bravo73]

Yep I think that it is called the ‘aux belt’ because of ‘Auxiliaries Belt’, not ‘auxiliary belt’. IYSWIM. 

[Chillidoggy]

‘Auxiliaries’.