AC Compressor Bearing? - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 12 (permalink) Old 10-25-2012, 07:44 AM Thread Starter
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Exclamation AC Compressor Bearing?

So... while stuck in traffic on the highway this morning my belt started to squeal and i lost my ac. The air was still blowing, just not airconditioned. When we finally got moving, i didnt hear the squeal as much and i turned off the ac to see if the compressor disengaged would help. I suspect the compressor bearing or clutch locked up and the serpentine is now sliding over a locked up compressor.

When i got to my job, i parked and noticed that i hear a weird rattle, as if the insides of the clutch have shit skipping around inside, and the belt wasnt squealing anymore. As i increase the rpm, the sound intensifies.

This just happened a few hours ago and i havent gotten a chance to diagnose it anymore... but does what i just explained seem plausible? Anyone else ever experience something similar or have any insight? Thanks for any help.
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post #2 of 12 (permalink) Old 10-25-2012, 07:49 AM
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Sounds like the A/C compressor clutch springs broke. Does it sound like a small bell?

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post #3 of 12 (permalink) Old 10-25-2012, 08:27 AM Thread Starter
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Yeah thats actually a pretty good description lol. i can get the clutch on rockauto for $70... or a new compressor for $170 including clutch... you think its worth the extra $100 for the compressor too?
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post #4 of 12 (permalink) Old 10-25-2012, 11:53 AM
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Not really because then you have to flush the refrigerant change the pump, make sure lines don't leak and recharge the A/C system. If you only change the clutch well you only change the clutch.

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post #5 of 12 (permalink) Old 10-26-2012, 07:19 AM Thread Starter
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So I was doing some thinking last night and came to the conclusion that it cant be the clutch. When i click on and off the AC button, the clutch engages and disengages... meaning the clutch is still working, but whats happening is the compressor is locked up and thats whats making the belt squeal.

Has anyone here changed out the compressor?
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post #6 of 12 (permalink) Old 10-26-2012, 10:48 AM
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There is 3 different design so what year and model and engine?

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post #7 of 12 (permalink) Old 10-26-2012, 10:59 AM
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if you're removing the compressor you may as well put on a dummy pulley for added horsepowa!!!

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post #8 of 12 (permalink) Old 10-26-2012, 12:47 PM Thread Starter
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ive got an 06 LT Sedan 2.2.


Whats a dummy pulley?
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post #9 of 12 (permalink) Old 10-26-2012, 01:55 PM
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Here is what I have....




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post #10 of 12 (permalink) Old 10-27-2012, 12:23 AM
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Quote:
Originally Posted by chunkymonkey View Post
Whats a dummy pulley?
It's an n/a 4 cylinder. Enjoy your A/C
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