Noisy Alternator

1990 VOLVO 760
140,000 MILES • 4 CYL • TURBO • AUTOMATIC
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DRKTURKEY
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  • 3 POSTS
What are reasons for whistling noise from the alternator?
Feb 9, 2016 at 11:40 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
a bearing going bad will do that Ican't think of much else unless the fan at front is moving a ton of air.
Feb 9, 2016 at 12:05 PM
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DRKTURKEY
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  • 3 POSTS
Many thanks for your prompt response. I have already tightened the belt. Is the solution to replace the alternator?
Feb 9, 2016 at 12:08 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
normally yes
Feb 9, 2016 at 12:34 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
but disconnect the belt and see if noise stops
Feb 9, 2016 at 12:34 PM
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DRKTURKEY
  • MEMBER
  • 3 POSTS
Many thanks again!
Feb 9, 2016 at 12:36 PM
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