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A/C noise

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Old Dec 26, 2016 | 01:48 AM
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Default A/C noise

I notice a squeaking noise coming from my ac. When the ac is running there is no noise, but as soon as I turn the ac off, the squeaking noise begins. Any ideas what it can be or if I have to change out the compressor that is working just fine?
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Old Dec 26, 2016 | 02:22 AM
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A/C clutch bearing failure. Replace the A/C clutch on the front of the compressor.

When the A/C is off the pulley spins freely on a bearing. If the bearing goes bad it makes a noise. When the A/C is on and the compressor is in use the clutch engages and the pulley spins the compressor.

The part isn't that expensive and doesn't require much labor.

Last edited by Rob 02; Dec 26, 2016 at 02:24 AM.
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Old Dec 26, 2016 | 11:08 AM
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Do I need any special tools? I take it I do not have to drain the Freon? Have you seen a good post on how to change it?
Steve
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Old Dec 26, 2016 | 08:24 PM
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No! You don't have to take the freon (R 134a) out.


Call a mechanic.

Last edited by Rob 02; Dec 26, 2016 at 08:27 PM.
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Old Dec 27, 2016 | 07:56 PM
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Originally Posted by Rob 02
No! You don't have to take the freon (R 134a) out.


Call a mechanic.
I wanted to thank you for your help in your first post. I was not sure if I had to pull the compressor out or if I could change it on the car, that's why I was asking if I had to drain the Freon.
I always do all my own work on the car once I know what the issue is and use to be an aircraft mechanic so I don't need to "call a mechanic". I guess your second post was not as helpful, but thanks for the first post.
Steve
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Old Dec 28, 2016 | 07:41 AM
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You can just remove the belts and swap out the clutch pulley.
I'm sorry if I seemed short but It is hard to know someones skill level. I don't want to get someone in over their head. It really isn't that hard if you see the part then I think you will know.
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Old Dec 28, 2016 | 08:02 AM
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It will be the same process as most Chevy's of the era. I am on vacation and don't have my manuals handy for a step by step breakdown. You should be able to find video in this from YouTube.

I highly recommend the factory service manual if you plan on doing your own work. they are a little pricey but you can find good ones used.

Last edited by Rob 02; Dec 28, 2016 at 08:03 AM.
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