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Weird Squealing under Load

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Old May 12, 2015 | 10:13 PM
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Default Weird Squealing under Load

Yo everyone!

Trying to diagnose and gauge the seriousness of a squeal coming distinctly from the engine compartment under moderate to heavy load in gear, typically a low one.

I have noticed it's been wet or very humid out lately... so I can't speak of really dry weather. It does not do it while idling and no sound with the hood up. It doesn't seem to do it under low loads.

Is there a bearing I should look out for? S-Belt need replacing maybe?

Any ideas would be great!
Travis
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Old May 12, 2015 | 10:44 PM
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Check all items belt driven eg. water pump, idler pulley, alternator etc. first.
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Old May 12, 2015 | 10:45 PM
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Just revvin' the engine while parked doesn't seem to do anything but make a lot of noise xP

Then again, the car is usually totally warm when I do that. I'll check in the morning before I head to work if it does it cold out of gear.
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Old May 13, 2015 | 02:14 PM
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Checked it out this morning, doesn't do it when cold... but it's also kinda rainy here in San Antonio. Hard to diagnose exactly when it doesn't do it while sitting still.
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Old May 13, 2015 | 03:05 PM
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aside from checking the ususal belts, pullies, and belt driven accessories, take a good look at the harmonic balancer as well - they're notorious for messing up and can cause all kinds of wierd symptoms and noises.... see if it's wobbling at all, the rubber can separate from the steel ring.....
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Old May 19, 2015 | 08:01 PM
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Could the noise be the rear end? The noise resonates through the torque tube and can be heard throughout the car, and only when in gear....
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Old May 20, 2015 | 02:40 PM
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It's entirely possible, I haven't been able to pinpoint the trouble spot or source of the noise yet.

I'm thinking about heading up to Dallas this weekend and trading in for a C6 GS... maybe that'll fix the problem
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Old May 21, 2015 | 11:40 AM
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Does it make any difference with the AC on or off? My AC pulley needed a new bearing and squealed under load. If it goes away when your switch off your AC, its a good place to start.
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