Alternator Confusion

[FlyinRyan]

Hey folks,

My current alternator is whining pretty bad, pretty sure its a blown bearing.

I've been pricing alternators online and am pretty confused by the core/no core thing...

Can anyone explain?

Thanks

 

[hondaxr650]

Rebuilt alternators require you to return your old one as a rebuildable core. They usually charge a core fee that you get back when you return your old one. New stuff usually doesn't require your core.