Okay, so I have always had a problem with a noise under my hood, I always figured it was my super charger coupler, so I order a ZZ coupler and replaced it, then half the noise went away, the super charger is quite now.. But there is still noise.. Now when I spin some of the pulleys with out the belts on there sounds like they have dirt or something in there, like a bad bearing in a skate board if you know what I mean.. Then If i spin my alternator pulley, the fan in side the alternator is very squeaky and loud.. So 'm not sure if i should replace both.. any ideas?


1998 Grand Prix belt noise - YouTube