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08-28-2008, 03:51 PM
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#1 |
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Account Suspended
Join Date: Nov 2002
Location: Winnipeg, Manitoba, Canada
Posts: 798
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AC Compressor Noise
Ok - next question...
Just recently my AC compressor has become quite noisy. Not having the benefit of sound, I would describe it as a continuous chatter. The noise is obviously rotational - increasing in speed, not necessarily volume, with increased RPM. Compressor still cools great, and all else seems OK. Question 1: Does this sound like an internal compressor issue, or clutch, or what? Question 2: Is it repairable, or do I replace the compressor? And finally, just in case some of you "purists" are thinking it - - I WILL NOT be removing the AC system...  Thanks. Last edited by Zilverado; 08-28-2008 at 03:53 PM. |
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08-28-2008, 04:09 PM
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#2 |
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Registered User
Join Date: Jun 2008
Location: Texas Ctiy TX
Posts: 228
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Re: AC Compressor Noise
My A/C compressor is a week old and is making a similar noise occasionaly at idle. Oh, and purist or not, A/C has been availible on our trucks from the begining. Why sweat?
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08-28-2008, 04:13 PM
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#3 | |
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Account Suspended
Join Date: Nov 2002
Location: Winnipeg, Manitoba, Canada
Posts: 798
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Re: AC Compressor Noise
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08-28-2008, 05:22 PM
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#4 |
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On a budget like Fred Sanford
Join Date: Oct 2005
Location: Topeka, KS
Posts: 2,031
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Re: AC Compressor Noise
Mine makes a pretty audible ticking sound at lower rpm.....still blows cold though. Probably run it till it pukes & put on another cheapie reman.
Probably wouldn't be a bad idea to get a set of gauges on there and see what your pressures are.
__________________
'85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD Last edited by swb85; 08-28-2008 at 05:23 PM. |
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08-28-2008, 06:37 PM
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#5 |
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Account Suspended
Join Date: Apr 2008
Location: Hesperia, Ca
Posts: 1,332
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Re: AC Compressor Noise
Does it sound like a stuck lifter?
I just dumped a grand into my system at the beginning of the summer to get it up and running again. That included a new compressor. I was thinking about taking it back to the shop to see if it was normal. |
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08-28-2008, 08:06 PM
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#6 |
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78 Big10 454
 
Join Date: Jul 2008
Location: Pismo Beach, CA
Posts: 839
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Re: AC Compressor Noise
My A/C just went south this week, right before my annual Labor Day trip to the Colorado River. My mechanic said $1600.00! Now my wife is trying to get me to haul my pride and joy to the local junkyard and buy a new Silverado. Women.....
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08-28-2008, 09:46 PM
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#7 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,319
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Re: AC Compressor Noise
usually if a bearing in the compressor goes so wil the compressor..the clutch will make a racket and can be replaced cheaply.. the last one i bought was $50 but that was a couple of years ago for an old caravan.... usually if you get one of the cheap stethescopes in harbor freight, you can pin down where the noise is coming from if you put the probe on different parts of the compressor while its running
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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08-29-2008, 08:44 AM
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#8 |
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Account Suspended
Join Date: Nov 2002
Location: Winnipeg, Manitoba, Canada
Posts: 798
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Re: AC Compressor Noise
Thanks for the thoughts - it gives me some things to check. I've also done some "googling" of AC issues and have some leads to chase down. But I do have another question...
I assume the clutch could be replaced without disconnecting AC lines? |
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08-29-2008, 08:52 AM
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#9 |
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Registered User
Join Date: Jun 2002
Location: Kansas City, MO
Posts: 186
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Re: AC Compressor Noise
Mine sounds like an angry badger, GRRRRRRR. It has been like that for about a year now. I think the front seal is bad since it slings oil from the clutch all over the engine bay. I assume it will bite the dust soon and I'll replace it with a reman.
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08-29-2008, 10:24 AM
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#10 |
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It'd be alot cooler if you did
Join Date: May 2003
Location: Three Rivers, MI
Posts: 2,345
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Re: AC Compressor Noise
sounds like the bearing.....
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08-29-2008, 03:28 PM
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#11 |
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Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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Re: AC Compressor Noise
The clutch can be replaced without cracking the system open, assuming you have the radial (R4) compressor like I have. For the older style, I don't know. Removing the R4 requires a special tool that auto parts stores around here rent/loan out.
If you have to get one, make sure you compare the price of a remanufactured compressor with clutch to the cost of a remanufactured clutch alone. Around here, the price difference when I biought mine was only about $10, so for core charge + $10, I got a remanufactured compressor to put up on the shelf. People I have talked to around here say that the typical parts store remanufactured compressor is a piece of junk, typically good for one summer of use. My neighbor replaced his every spring for several years in a row before he traded it in. The last time mine went out, I replaced it with a new Delphi unit that was between $200 and $300. This is its 5th summer, and it is still working fine. Buyingit hurt at the time, but it was worth the extra cost. All of the 80s trucks with the radial compressor make a groaning noise, AFAIK. There is a TSB available for a fix that involves a clutch replacement. I have a PDF of the document somewhere if anyone would like to see it. Slonaker |
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09-02-2008, 12:19 AM
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#12 | |
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Registered User
Join Date: Jun 2008
Location: Texas Ctiy TX
Posts: 228
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Re: AC Compressor Noise
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09-03-2008, 05:15 PM
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#13 | |
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Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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Re: AC Compressor Noise
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The PDFs are in this folder. I'll leave them up for a few days so that anyone who wants them can get them. Slonaker |
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