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Noise when idling

Tiny
OREGINAL58
  • MEMBER
  • 1991 OLDSMOBILE 88
  • 180,000 MILES
My 1991 Oldsmobile 88 Royale is making a noise that sounds like a fan blade hitting something when it idles, the noise stops when I accelerate. Any idea what might be the problem?
Sunday, July 1st, 2012 AT 4:26 PM

3 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,741 POSTS
You need someone to look under the hood to search for the source of the noise. If it's not obvious or easy to spot, use a stethoscope. Idler pulleys for the serpentine belt would the typical first thing to check.
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Sunday, July 1st, 2012 AT 4:41 PM
Tiny
OREGINAL58
  • MEMBER
  • 2 POSTS
It does seem to be coming from that area, specifically the alternator area. A friend suggested it could be the bearings in the water pump, could that be the problem?
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Sunday, July 1st, 2012 AT 4:54 PM
Tiny
DJCL
  • MECHANIC
  • 767 POSTS
Remove the belt and spin them by hand also rock them to feel fore bearing play
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Sunday, July 1st, 2012 AT 5:29 PM

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