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Old 04-28-2005, 09:21 PM   #1 (permalink)
Nasty Wendy
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How do you stop the AC Compressor from squealing?

My AC Compressor has decided to start squealing and lower RPMs. I really don't want to beat it with a bat but if thats what it will take to shut it the hell up then so be it. I've tried WD40 and some spray on White Lithium Grease but the squeal just comes back. It goes away after I spray it but the next time I start it up its squealing again. Help me please. TIA.
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Old 04-28-2005, 09:37 PM   #2 (permalink)
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Is it noisey with the a/c on or off....clutch engaged or not?

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Old 04-28-2005, 09:40 PM   #3 (permalink)
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Either or. I never start up the AC on so its alway disengaged at first and it squeals and when it engages it still squeals.
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Old 04-28-2005, 09:44 PM   #4 (permalink)
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I'd pull the belt and see how the bearing checks out.

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Old 04-28-2005, 09:47 PM   #5 (permalink)
Nasty Wendy
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Question

What do I have to do to check the bearing on the AC Compressor? I can pull the belt off but then what.
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Old 04-28-2005, 09:56 PM   #6 (permalink)
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Sure your belt isn't loose/worn? The added stress of the A/C could be causing it.

If the front compressor bearing is bad - I don't know if you can replace it w/o losing all the freon..
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Old 04-28-2005, 10:02 PM   #7 (permalink)
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Its a new belt. And the noise goes away when I spray a little WD40 on the AC Compressor wheel.
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Old 04-28-2005, 10:06 PM   #8 (permalink)
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would sound like the belt if it does it on or off and spraying the pulley makes it stop...unless you are spraying between the pulley and the clutch drive?

then it would seem to be in the bearings....if you take the belt off, does the pulley freewheel with no roughness?
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Old 04-28-2005, 10:10 PM   #9 (permalink)
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If the noise goes away after a spray of wd40...could you be getting some on the pulley and allowing the belt to slip? The bearing should spin free and if it doesn't the bearing its not easy to replace.....is the bat wooden?

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Old 04-28-2005, 10:14 PM   #10 (permalink)
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NW - Looked through the TR service manual - and of course there's nothing on the A/C compressor internals.

It could be the bearing squealing, it could be in the beginning stages of seizing, looks like replacement is imminent.


A/c Compressor Sale

And there seems to be quite a bit of R12 on Ebay.
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Old 04-28-2005, 11:05 PM   #11 (permalink)
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Cool

Call Brett at:

Savannah Auto Air
5778 Ogeechee Rd.
Savannah, GA 31405
912.927.0111 M-F EST

SAVANNAHAUTOAIR.COM
BRETT@SAVANNAHAUTOAIR.COM

His prices and tech help can't be beat. He also has free shipping that ends this month. I just purchase a A/C compressor and other parts related to a compressor seizure for my other car.
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Old 04-29-2005, 12:13 AM   #12 (permalink)
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Wendy.
I had a simular problem 2 years ago.The ac was squealing. One weekend I started to take it off when I noticed one of the long bottom bolts had snapped and was rubbing on the compressor wheel.I had to get a threaded rod to replace the long bolt.
Just posting what had happened to me.
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Old 04-29-2005, 12:33 AM   #13 (permalink)
Nasty Wendy
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Thanks for the input guys. Here is a little more info. I did the 134a conversion about two years ago. I replaced the AC Compressor then with a new one and of course had a new dryer put on too. I didn't do any of this work myself as I'm not licensed to handle the freon and I don't have the gauges or the experience to do it right. The shop that did it knew their stuff and got it right. The AC has blown as cold as it did with R12 and still does to this day. So the Compressor is only two years old. I'll have to see where it came from and get the warrantee info it.

I'll pull the belt and see if the compressor free wheels smoothly or not. I'll also check for strange stuff like Big Mike posted. I'm not spraying WD-40 between the pulley and belt but rather under the bottom of the pulley and I mean just little bit will silence it until the next start up. The white lithium lasted a couple of start ups at first but now its the same as WD-40.

Thanks again everyone. I was hoping that there was a secret technique to get this to stop but I guess the bat will have to do.
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Old 04-29-2005, 06:00 AM   #14 (permalink)
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Batman?

I've found it very difficult to spray anything anywhere with precision. How soon after new belt installed did squeal start??

I think Brett at SAVANNAHAUTOAIR is also running a special on wooden bats this month--oops,, almost outa time for batman special.
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Old 04-29-2005, 08:34 AM   #15 (permalink)
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More food for thought,

I work on a/c systems all the time at work, the worst squealing I've seen is when the A/C clutch wears out and there is no longer an air gap between the clutch and the A/C pulley

There should be just a slight air gap there that you should be able to see...

Worst case you'll need a new clutch, relativey easy to change

good luck
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