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  1. #1

    ugent question on A/C compressor

    okay my A/C doesn't work since I've had the car

    Problem:

    Today I've noticed that the A/C compressor makes a very loud metal-on-metal scratchy sound. When I took the belt off and spun it I noticed that only the outter ring of the compressor (what the belt spins) is all that turns, the rest of the guts of the compressor do not (I don't know if they ever did). Anyways I'm not sure if its always been like that and it just got alot louder or if the sound just started, but is it something I should be worried about? Are there like bad bearings or something on the compressor pully? The pully doesn't seem loose when inspecting it by hand, just makes the metallic sound and doesn't turn the compressor when you spin it.

    I just don't want the pully to come off or something and kill my engine.

    Any input is appreciated.
    <br />[size=7pt]2003 Impala LS&nbsp; _&nbsp; Series II 3800 _ Completely stock with 5x,xxx miles[/size]<br />Leather and roof, clean as a whistle.<br />http://gmwbody.com

  2. #2
    Robby1870's Avatar
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    ugent question on A/C compressor

    sounds like your A/C clutch might be fucked.
    Robby Whitesell
    2006 Pontiac G6 GT - 3500 V6

    1985 Toyota Pickup DLX - 2WD - 2.4L I4

  3. #3

    ugent question on A/C compressor

    Quote Originally Posted by robby1870
    sounds like your A/C clutch might be fucked.
    It probably is. Aside from the annoyance, is that dangerous?
    <br />[size=7pt]2003 Impala LS&nbsp; _&nbsp; Series II 3800 _ Completely stock with 5x,xxx miles[/size]<br />Leather and roof, clean as a whistle.<br />http://gmwbody.com

  4. #4
    Lurker DiscoStudd's Avatar
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    ugent question on A/C compressor

    Try spraying some silicone lube on the clutch first before you replace it. I've heard that sometimes that's all it takes to quiet it down. You won't be able to spin the compressor with the car off unless you jumper the clutch to the battery to engage it...

    FWIW, I've also heard that the clutch is a $25 part and is fairly easy to replace...

    Kevin B.
    2004 Chevy Impala 3400 V6 - Color: Victory Red

    1999 Chevy Tahoe 5.7 Vortec V8 - Color: You guessed it, Victory Red!

  5. #5

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    ugent question on A/C compressor

    My Cutlass occured that problem with only about 55-60K on it. I hated that noise, but never feared it. Its your damn clutch as they junk out in all 3.1 & 3100 GM vehicles(not sure about the 2.8's). I'll tell you one thing about this, the garage will rape you if they fix it(easily $400). I called aroung to all the junk yards around here and I could have landed a used compressor for $60. Then people told me that there could be further problems with my a/c system, so I lived without replacing it!

    2011 Chevy Avalanche LS Black on Black with Chrome Accents

  6. #6

    ugent question on A/C compressor

    Quote Originally Posted by Dannymik
    My Cutlass occured that problem with only about 55-60K on it. I hated that noise, but never feared it. Its your damn clutch as they junk out in all 3.1 & 3100 GM vehicles(not sure about the 2.8's). I'll tell you one thing about this, the garage will rape you if they fix it(easily $400). I called aroung to all the junk yards around here and I could have landed a used compressor for $60. Then people told me that there could be further problems with my a/c system, so I lived without replacing it!
    I see. I think what I will do is live with it for now... and try to fix (grease?) the clutch myself when I have time. (I have the 88 I can experiment on )

    The bypass is a cool idea but I would like to eventually get my A/C working hence it would be pointless...
    <br />[size=7pt]2003 Impala LS&nbsp; _&nbsp; Series II 3800 _ Completely stock with 5x,xxx miles[/size]<br />Leather and roof, clean as a whistle.<br />http://gmwbody.com

  7. #7
    Community Manager White93z34's Avatar
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    ugent question on A/C compressor

    well i've seen that hapien on my friends park avenue (L36), it sounded prety bad for awhile till one day it just siezed up.
    -Chris D. - Your Community Manager

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  8. #8

    ugent question on A/C compressor

    Quote Originally Posted by White93z34
    well i've seen that hapien on my friends park avenue (L36), it sounded prety bad for awhile till one day it just siezed up.
    It siezed up? What happened? Mine is very loud.. you can hear it the grinding noise while driving...
    <br />[size=7pt]2003 Impala LS&nbsp; _&nbsp; Series II 3800 _ Completely stock with 5x,xxx miles[/size]<br />Leather and roof, clean as a whistle.<br />http://gmwbody.com

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    ugent question on A/C compressor

    cbad I did spray mine with some kind of silicone spray and it did help with the metal on metal sound, but eventually it will dry up and flake away...you can see the metal shavings down there!

    2011 Chevy Avalanche LS Black on Black with Chrome Accents

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    Community Manager White93z34's Avatar
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    ugent question on A/C compressor

    Quote Originally Posted by C-BAD
    Quote Originally Posted by White93z34
    well i've seen that hapien on my friends park avenue (L36), it sounded prety bad for awhile till one day it just siezed up.
    It siezed up? What happened? Mine is very loud.. you can hear it the grinding noise while driving...
    it made a metal on metal noise for awhile then in his driveway it siezed up and he had to get a new one. it was fairly loud for awhile and just got louder.
    -Chris D. - Your Community Manager

    1992 Chevrolet Lumina Z34 3.4L TDC v6 Getrag 284
    1990 Pontiac Turbo Grand Prix 3.1L v6 Hydramatic 4T60
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    1987 Chevrolet Camaro Z28/IROC-Z 5.0L v8, Hydramatic 700R4

  11. #11
    Forum Moderator digitaloutsider's Avatar
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    ugent question on A/C compressor

    Quote Originally Posted by White93z34
    Quote Originally Posted by C-BAD
    Quote Originally Posted by White93z34
    well i've seen that hapien on my friends park avenue (L36), it sounded prety bad for awhile till one day it just siezed up.
    It siezed up? What happened? Mine is very loud.. you can hear it the grinding noise while driving...
    it made a metal on metal noise for awhile then in his driveway it siezed up and he had to get a new one. it was fairly loud for awhile and just got louder.
    Yep.. Exactly what happened. I just bought a shorter belt..
    2006 Nissan Altima SE-R 3.5L 214ci VQ35DE DOHC 60 V6 | 6MT
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  12. #12

    ugent question on A/C compressor

    Okay I've heard from some people that you CAN'T remove the compressor and just throw on a smaller belt (that you HAVE to get a bypass pully) and from others that you CAN do it...

    I WANT ANSWERS!!!!!

    If so, anyone have a clue what sized belt I would need??
    <br />[size=7pt]2003 Impala LS&nbsp; _&nbsp; Series II 3800 _ Completely stock with 5x,xxx miles[/size]<br />Leather and roof, clean as a whistle.<br />http://gmwbody.com

  13. #13
    Forum Moderator digitaloutsider's Avatar
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    ugent question on A/C compressor

    Quote Originally Posted by C-BAD
    Okay I've heard from some people that you CAN'T remove the compressor and just throw on a smaller belt (that you HAVE to get a bypass pully) and from others that you CAN do it...

    I WANT ANSWERS!!!!!

    If so, anyone have a clue what sized belt I would need??
    Fuck those people. I'm living proof you don't need it on there. Just put the belt on there minus the compressor and take up the slack. Go to your nearest auto parts store and they'll help you find one of that size.
    2006 Nissan Altima SE-R 3.5L 214ci VQ35DE DOHC 60 V6 | 6MT
    Raclingline HFPCs and Y-pipe, NWP VIAS delete, Goodridge SS brake lines, removed airbox snorkel, deburgered.

    1998 Jeep Grand Cherokee 5.9 Limited 5.9L 360ci Magnum Pushrod 90 V8 | 46RE | NV249
    Flowmaster 50 SUV muffler, 180 t-stat, CAI, does sick burnouts.

    1994 Ford Thunderbird SC Supercharged Intercooled 3.8L 231ci Pushrod 90 V6 | M5R2
    180 t-stat, intake, ASP UDPs, 10% S/C pulley.

  14. #14

    ugent question on A/C compressor

    sounds like someone charged the system and didn't add any oil, so the swash plate inside is taking way more energy to try to spin, this will cause the internal part of the compressor (the part not spinnign all the time) to drag when you do activate the clutch itself to run the air-conditioning system.

    I'd recomend a new AC compressor, and a full recharge with good ol' fassioned R-12 from a certified shop.

    --Dave.

  15. #15

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    ugent question on A/C compressor

    Quote Originally Posted by DaveFromColorado
    sounds like someone charged the system and didn't add any oil, so the swash plate inside is taking way more energy to try to spin, this will cause the internal part of the compressor (the part not spinnign all the time) to drag when you do activate the clutch itself to run the air-conditioning system.

    I'd recomend a new AC compressor, and a full recharge with good ol' fassioned R-12 from a certified shop.

    --Dave.
    Nothing good about R-12. It's illegal.

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