Alternator bearing bad or belt tension wrong?

[Fiat88]

I noticed that my car still has a intermittent whining noise sometimes. I did some further investigating with my Stethoscope(long screw driver) and when placed on the alternator I can hear a certain slight grinding noise. Could the bearings in the alt be the source?

[124JOE]

that sounds right
it could last awille,if its stored for the winter you can rebuild it

[Exit98]

Hi Fiat 88

Is your alternator on the passenger side of your motor?

Mine made a terrible noise that I chased for a while. Turns out the boss on the engine block that accepts the long bolt is not as wide as it should be, leaving a gap between the alternator fitting and the block. I should have shimmed the gap, but be sure the long bolt is tightened waaay tight to eliminate vibration.

One of these days you'll have to get down and meet us Jersey guys.

[majicwrench]

Pull the belt....does the noise go away?? Now spin the alt by hand, is it noisy??

[Fiat88]

Hi Fiat 88

Is your alternator on the passenger side of your motor?

Mine made a terrible noise that I chased for a while. Turns out the boss on the engine block that accepts the long bolt is not as wide as it should be, leaving a gap between the alternator fitting and the block. I should have shimmed the gap, but be sure the long bolt is tightened waaay tight to eliminate vibration.

One of these days you'll have to get down and meet us Jersey guys.

No my alt is on drivers side. Yup I know I've been promising George for the last 2 years! but I plan to.

Pull the belt....does the noise go away?? Now spin the alt by hand, is it noisy??

Will check that if I here the noise again.

[Fiat88]

that sounds right
it could last awille,if its stored for the winter you can rebuild it

Yeah not too hard to replace.

[NJFIAT1981]

Have spare alts if you need them. George

[Fiat88]

Noise came back! Will take the belt off tomorrow and spin the pulley by hand.

[fiat218]

MY ALTERNATOR where the long bolt on the bottom went ,

i had to get a big bushing made to fit that round hole. im not sure what was ever there now it nice and tight