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weird compressor type sound coming from engine bay

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Old 02-09-2010, 05:00 AM
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Exclamation weird compressor type sound coming from engine bay

I have a 2000 ls1 with a few bolt-ons with 85,000 miles on it. Lately it’s been making a funny noise from the engine bay that almost sounds like the rattle/grind an air compressor makes. It sounded like it was coming from the power steering pump area so I just went ahead and changed it but the noise is still there. When I first start the car I can’t hear it but it becomes much louder as the engine warms up. Has anyone ever heard anything like this before?
Old 02-09-2010, 05:14 AM
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Water pump?
Old 02-09-2010, 05:52 AM
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air pump??
Old 02-09-2010, 05:52 AM
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water pump was my next guess, just thought id ask before spending the cash for another part i didnt need.
thanks for the reply
Old 02-09-2010, 03:18 PM
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Like a rattle? Worn out tensioners sound like that.
Old 02-09-2010, 03:22 PM
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kinda like a rattle maybe a grind here and there... never heard anything like it. the only thing i can compare it to is when my air compressor charges it sounds similar...
Old 02-09-2010, 03:24 PM
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I would take off the belt and spin each pulley or go buy a cheap auto stethoscope
Old 02-09-2010, 03:32 PM
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tested the other pulleys already but didnt find anything out of the norm, now ill try the stethoscope... thanks




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