Mechanics

CHEVY POSSIBLE PULLEY TROUBLE

1991 Chevrolet Silverado

Noises problem
1991 Chevy Silverado V8 Two Wheel Drive Automatic 125000 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
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Ron15
June 23, 2008.



Give it a good listen is the sound coming from the alt? If is a new or rebuilt unit?

Docfixit
Jun 23, 2008.
Hi, yes the altenator is rebuilt

Tiny
Ron15
Jun 23, 2008.
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

Docfixit
Jun 24, 2008.
Hi, I believe it is AC compressor. Thanks for your help

Tiny
Ron15
Jun 24, 2008.
You welcome if AC has been converted to 134a maybe oil charge might quiet it down.

Docfixit
Jun 24, 2008.