alternator pully leaking

Hello, Your first task is to identify where the grease is coming from. There is a very small amount of grease packed into the sealed bearing of the alternator, so if grease is actively being sprayed I would question if there is too great an amount of grease to originate from the alternator. Second, if the alternator is shooting it's grease out, you would have to replace it. You would also have some chirping and grinding begin soon.