Alternator bearing going???

[MVSHO]

Hey all,

Lately I have been noticing a slight grinding noise coming from what appears to be the alternator area. It doesn't do it all the time. Today when I started it to go to lunch it sounded like a slight intermittent knock. Its definetely coming from the alternator area. I'm fairly sure its not a rod knock. Do the bearings go bad in the alternator and if they do would they cause this grinding and knocking noise? I notice it at idle, but not when accelerating. Not sure if the alternator was replaced. No codes or idiot lights coming on. Its a 95 MTX with 144,000mi on the clock.

 

[Ishodu]

Yes the bearings do go bad in them. Take a long stethoscope or if you don't have one a long screw driver place it on the Alt Housing then put the other end against your ear. You should be able to pin point the noise this way.

 

[Dan H]

When my Alternator bearings went bad they made an intermitent very high pitched squealing sound, especially when accelerating.

Two days and the Alt was toast.