LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

high pitched squeal coming from engine LT1 engine. Help

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Old 05-04-2010, 11:29 AM
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high pitched squeal coming from engine LT1 engine. Help

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I have a noise that sounds like a altenator squeal. I have replaced the Alternator, idle tensioner pulley and bearing, power steering pump, belt and it still squeals when you give it gas. At idle it makes no noise.
If I take off the serpentine belt and there is no noise at all when I rev it up.
I am stumped on this. Any ideas.
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Old 05-04-2010, 11:58 AM
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Only thing left is the AC compressor...

Also, what belt did you use? I've had squeal with new belts until I fit a Goodyear Gatorback....much better than others in that regard.
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Old 05-04-2010, 01:11 PM
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My bad, I also replaced the ac acompressor with a 1LE AC delete pulley.
I thinking I might have to replace the tensioner for the idle pulley. That is all that is left.
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Old 05-04-2010, 02:12 PM
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Usually belt noise is from a belt that is not tight enough.
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Old 05-08-2010, 10:40 AM
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Thanks all
I replaced the tensioner itself and that fixed the problem.
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