Removing Alternator Pulley

[Spaceghost]

There looks to be a torx bit opening on the end of the alternator spindle and then a bug nut that holds the stock pulley on there. Is the general method of removing the alternator pulley to hold the spindle in place while turning the nut off?

Any idea what size torx bit that is? Is there another manner by which people remove the pulley?

 

[BillBoost37]

Zap the nut with an impact while holding the pulley edge.

Or you'd need that torx and a wrench.

 

[Spaceghost]

I'll have to use the torx and the wrench then because I don;t have access to an impact gun.