ES - 5th Gen (2007-2012) Discussion topics related to 2007+ ES350

Squealing noise under the hood

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Old 04-23-16, 05:43 PM
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marvinje
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Default Squealing noise under the hood

(2008 ES 350) I hear this squealing noise under the hood, I had the AC compressor rebuilt because I was told that was the cause, low and behold it's not, I only hear the noise when the car is in gear, but I don't hear it when in park or when I drive, but it's loud in drive and reverse. The water pump has been replaced too. Where is this coming from?
Old 04-24-16, 12:07 AM
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ESh
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It's the alternator decoupler pulley.
Old 04-24-16, 07:04 AM
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marvinje
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I do hear that squealing when it's in park, it's just not nearly as loud and when I turn on the AC, it's very pronounced. The car has 128000 on it and I take it for its scheduled maintenance. So I'm sure it's showing its age, but I want to quiet that noise
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