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Old 02-05-2007, 03:31 PM   #1
SilverSpool
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Default Squeeling and whining A/C

when i turn the fans on.. with, and without the AC on, i hear a squeeling sound, when i look at it, it looks like it hardly wants to turn(ac compressor, sound coming from it as well)

and this is running the heater also

04 wrx, 63k miles, bone stock drivetrain..

any thoughts?
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Old 02-06-2007, 12:09 AM   #2
Subie Gal
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dead or dying ac compressor would be my guess

you might want to get it in to a tech for the official say so....
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Old 02-06-2007, 08:56 AM   #3
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worn/loose belt?
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Old 02-07-2007, 11:15 AM   #4
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Since it's free, check to see if your belt is loose or needs tightening. Here's a how-to:

http://forums.nasioc.com/forums/show...92&postcount=2
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Old 02-07-2007, 01:02 PM   #5
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Had the same noise. At first I was convinced it was the compressor but then realized it made the noise if the compressor wasn't on also.

Then thought it was the AC fan clutch because that is spinning whether or not it's engaged with the compressor.

I finally realized it was the AC pulley after snipping the belt. Pulley would barely turn by hand.

Edit : just to clarify, it's the A/C idler pulley (small pulley that supplies the tension on the belt located between the crank pulley and the AC pulley, AKA the tensioner pulley)
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Old 02-10-2007, 06:20 PM   #6
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Quote:
Originally Posted by zavigm View Post
Had the same noise. At first I was convinced it was the compressor but then realized it made the noise if the compressor wasn't on also.

Then thought it was the AC fan clutch because that is spinning whether or not it's engaged with the compressor.

I finally realized it was the AC pulley after snipping the belt. Pulley would barely turn by hand.

Edit : just to clarify, it's the A/C idler pulley (small pulley that supplies the tension on the belt located between the crank pulley and the AC pulley, AKA the tensioner pulley)
and the fix?
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Old 02-13-2007, 03:03 AM   #7
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Sorry, been offline for a few days...If the said pulley is your problem, the fix is to replace the pulley. It's like $20 something.

Either loosen the tension on the belt so you can see if it spins freely, or do what I did, cut the belt off with scissors. I plan on replacing it when it warms up, too cold to be dealing with it now. Got rid of the noise though!
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Old 02-13-2007, 03:21 AM   #8
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Number 13 is what was causing my noise. It was pretty much an all the time type noise, with or without the AC on, because that belt is always spinning.



http://www.subarupartsforyou.com/cp_...hp?partid=5483

edit - sorry jamie, couldn't find it on your site.

Last edited by z; 02-13-2007 at 03:35 AM.
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Old 03-10-2007, 01:17 AM   #9
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I had this same problem with my A/C compressor. Basically what is happening, is that the oil inside your A/C lines have leaked out of your main seal and has gotten onto the clutch surface of your compressor. The oil as well as an uneven clutch surface was causing major slippage. If this is your problem here's how I fixed the problem of course depending on how mechanically proficient you are:

1) Take allen key and remove clutch pack. You might have to pry a little bit with a screwdriver. You'll need to just work it off as gently as possible. Just try not to bend it.
2) Look at the metal clutch contact surface and look for black crap. You'll need to wipe this off.
3) Take a bastard file, and with the engine running, hold the file against the clutch surface to refinish the surface nice and smooth.
4) Next, take the clutch pack and try to resurface this area as best as possible.
5) Reassemble

You're basically trying to make the contact surface between the metal as smooth as possible. Feel free to PM me if you have further questions.
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Old 03-16-2007, 02:29 PM   #10
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the pulley doesnt even turn anymore.. the belt just slips... AC compressor pulley
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Old 03-16-2007, 02:57 PM   #11
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i took the clutch off, the pulley turns fine, but the clutch and the shaft its connected to, to the AC compressor doesnt turn, is my AC compressor toast?
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Old 03-16-2007, 03:48 PM   #12
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It should be possible to turn the compressor by hand, grasping the cluch hub. If it doesn't budge at all, it must be seized.
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Old 03-16-2007, 04:05 PM   #13
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Quote:
Originally Posted by avk View Post
It should be possible to turn the compressor by hand, grasping the cluch hub. If it doesn't budge at all, it must be seized.
yea, its stuck, wont turn by hand
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Old 03-17-2007, 03:16 AM   #14
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will a JDM v7 STI AC compressor fit in my 04 wrx?
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Old 05-04-2007, 01:47 PM   #15
initial_D
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I’m currently having the same problem.

When the ac is turned on, a get a screeching noise as the accessories belt tries to turn the AC compressor but can't.

I guess I will check the belt first to make sure it’s not loose. Then the clutch and finally the AC compressor.

Does anyone have instruction on how to properly replace the AC compressor?

Thanks.
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Old 05-21-2007, 10:26 AM   #16
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I just found this weekend that the tensioner pulley had fallen apart. The bearing was still attached to the bracket, but the pulley itself was nowhere to be found. The belt was down to just a sliver left, so I snipped it and got it out of the way until the new part shows up. I was worried my compressor had died, but it still spins, so I don't think that is what caused the failure.
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Old 05-23-2007, 12:16 PM   #17
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Quote:
Originally Posted by zavigm View Post
Sorry, been offline for a few days...If the said pulley is your problem, the fix is to replace the pulley. It's like $20 something.

Either loosen the tension on the belt so you can see if it spins freely, or do what I did, cut the belt off with scissors. I plan on replacing it when it warms up, too cold to be dealing with it now. Got rid of the noise though!
More like $40 at my local dealer...
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Old 05-23-2007, 12:20 PM   #18
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Quote:
Originally Posted by Coati View Post
More like $40 at my local dealer...
$29 for online subi parts dealers...http://www.subarupartsforyou.com/cp_...hp?partid=5483

2 dealers local to me had the part in stock, both for $33 (list price)
concordville subaru and delaware subaru.

Matt Slap Subaru tried to gouge me for $41 too though.
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