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Replacement alternator makes loud noise?

Tiny
LA.VERO
  • MEMBER
  • 2014 JEEP PATRIOT
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 112,003 MILES
Had my alternator was replaced in Feb 2023 and about 2 weeks ago started making this noise! Please help.
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Tuesday, April 25th, 2023 AT 11:45 PM

7 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,356 POSTS
O' boy, thanks for the video. It sounds like the new alternator is defective and needs to be replaced again. To be sure I would remove the serpentine belt and rotate the pulleys individually. You should be able to feel the rumbling in one of them, try the alternator first.

Here is how the belt is removed:

https://www.2carpros.com/articles/replace-serpentine-belt

Check out the images (below). Please let us know what happens.
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Thursday, April 27th, 2023 AT 2:00 PM
Tiny
LA.VERO
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  • 40 POSTS
If it’s the alternator it would be the 3rd one, I replaced. The 1st one was put in was defective, now this one. Is the problem common for this vehicle?
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Thursday, April 27th, 2023 AT 3:08 PM
Tiny
KEN L
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What brand is the alternator? Did the first one make this noise as well?
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Saturday, April 29th, 2023 AT 10:40 AM
Tiny
LA.VERO
  • MEMBER
  • 40 POSTS
Hello, it’s a $200.00 unit and yes, but just not as loud. In my video I posted does the belt look like it’s on right?
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Saturday, April 29th, 2023 AT 10:45 AM
Tiny
KEN L
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  • 43,356 POSTS
Yes, the belt looks like it is on correctly. I would remove the belt and tun each pulley by hand to help confirm the noise is coming from the alternator and if so may try a different brand or try to get another one.
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Sunday, April 30th, 2023 AT 10:19 AM
Tiny
LA.VERO
  • MEMBER
  • 40 POSTS
I spoke too soon the battery light came on, now won't start, so, yes defective alternator again.
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Sunday, April 30th, 2023 AT 10:54 AM
Tiny
KEN L
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  • 43,356 POSTS
I would get a replacement from rockauto. Com that way you wont have to keep redoing the job.
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Monday, May 1st, 2023 AT 9:56 AM

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