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1991 Chevy Silverado POSSIBLE PULLEY TROUBLE

Tiny
RON15
  • MEMBER
  • 1991 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
Hi, I have a chevy silverado with a 5.7l v8. I recently changed altenator and serp belt. There is a whinning noise coming from that area, I changed both tension and idler pulleys and I still have the noises. Any help would be appreciated. Thanks
Monday, June 23rd, 2008 AT 4:42 PM

5 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Give it a good listen is the sound coming from the alt? If is a new or rebuilt unit?
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Monday, June 23rd, 2008 AT 5:11 PM
Tiny
RON15
  • MEMBER
  • 2 POSTS
Hi, yes the altenator is rebuilt
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Monday, June 23rd, 2008 AT 5:30 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
You think noise is coming from alt?
Dose whine get louder say if headlights or AC is turned on?
If so it could be rectrifer bridge or bearing.
Let me know
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Tuesday, June 24th, 2008 AT 7:11 AM
Tiny
RON15
  • MEMBER
  • 2 POSTS
Hi, I believe it is AC compressor. Thanks for your help
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Tuesday, June 24th, 2008 AT 8:36 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
You welcome if AC has been converted to 134a maybe oil charge might quiet it down.
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Tuesday, June 24th, 2008 AT 8:46 AM

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