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Old 06-01-2008, 09:06 PM
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Barnsnake Barnsnake is offline
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Join Date: Nov 2003
Location: Parker County, Tx
Cobra Make, Engine: LoneStar LS427 , 427 Windsor
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Alternator bearing? Try removing the belt as a diagnostic.

You might also try 3 ft. of garden hose as a "stethoscope". Put one end to your ear and move the other end around in an attempt to locate the source of the noise.
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