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Noisy Alternator

Tiny
DRKTURKEY
  • MEMBER
  • 1990 VOLVO 760
  • 4 CYL
  • TURBO
  • AUTOMATIC
  • 140,000 MILES
What are reasons for whistling noise from the alternator?
Tuesday, February 9th, 2016 AT 11:40 AM

5 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
A bearing going bad will do that Ican't think of much else unless the fan at front is moving a ton of air.
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Tuesday, February 9th, 2016 AT 12:05 PM
Tiny
DRKTURKEY
  • MEMBER
  • 3 POSTS
Many thanks for your prompt response. I have already tightened the belt. Is the solution to replace the alternator?
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Tuesday, February 9th, 2016 AT 12:08 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Normally yes
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Tuesday, February 9th, 2016 AT 12:34 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
But disconnect the belt and see if noise stops
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Tuesday, February 9th, 2016 AT 12:34 PM
Tiny
DRKTURKEY
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  • 3 POSTS
Many thanks again!
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Tuesday, February 9th, 2016 AT 12:36 PM

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