1991 Chevy Silverado POSSIBLE PULLEY TROUBLE

1991 CHEVROLET SILVERADO
125,000 MILES • V8 • 2WD • AUTOMATIC
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RON15
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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
Jun 23, 2008 at 4:42 PM
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DOCFIXIT
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Give it a good listen is the sound coming from the alt.? If is a new or rebuilt unit?
Jun 23, 2008 at 5:11 PM
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RON15
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Hi, yes the altenator is rebuilt
Jun 23, 2008 at 5:30 PM
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DOCFIXIT
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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
Jun 24, 2008 at 7:11 AM
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RON15
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Hi, I believe it is AC compressor. Thanks for your help
Jun 24, 2008 at 8:36 AM
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DOCFIXIT
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You welcome if AC has been converted to 134a maybe oil charge might quiet it down.
Jun 24, 2008 at 8:46 AM