GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.

Home » Public Forums » GMCnet » [GMCnet] Engine AC Compressor Whirring noise
[GMCnet] Engine AC Compressor Whirring noise [message #251937] Wed, 11 June 2014 08:50 Go to next message
Neil Fonville is currently offline  Neil Fonville   
Messages: 68
Registered: May 2014
Karma: 0
Member
So the engine compressor is making a whirring type noise. Good technical description, right? I think it's the clutch. Is it possible to change the clutch without removing the entire compressor and recharging? I saw it on done on a YouTube video but it was a much new model.
Thanks Neil
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



1975 GMC II Allen, TX
Re: [GMCnet] Engine AC Compressor Whirring noise [message #251943 is a reply to message #251937] Wed, 11 June 2014 10:07 Go to previous messageGo to next message
jhbridges is currently offline  jhbridges   United States
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
Senior Member
Yes, and if you befriend Zhookoff, he's give you the puller part number. He has the one we used at the seal party last year.

--johnny


Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons. Braselton, Ga. I forgive them all, save those who hurt the dogs. They must answer to me in hell
Re: [GMCnet] Engine AC Compressor Whirring noise [message #251944 is a reply to message #251937] Wed, 11 June 2014 10:23 Go to previous messageGo to next message
Jon payne is currently offline  Jon payne   United States
Messages: 495
Registered: May 2008
Karma: 1
Senior Member
Could be the bearing also. I have pictures on the GMC MH photo site showing how to remove the clutch/bearing with out removing the compressor from the coach. Sorry I can't provide a link now but go to the photo website and search my user name (EMBREP). There is an album with the pictures. Note the tools to remove the clutch and bearing can be rented for free at Autozone

Jon Payne
76 Palm Beach
Westfield,IN
Re: [GMCnet] Engine AC Compressor Whirring noise [message #251945 is a reply to message #251944] Wed, 11 June 2014 10:39 Go to previous messageGo to next message
Neil Fonville is currently offline  Neil Fonville   
Messages: 68
Registered: May 2014
Karma: 0
Member
This is good info to know. I'm not sure I have the skills to do it myself but I have a mechanic coming to help with other issues this weekend. The cooling is good just really noisy. I most likely is the bearing I'm thinking. I just was not wanting to have the Freon removed and recharged.
Thanks...I'll go look for the photos.
Neil
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



1975 GMC II Allen, TX
Re: [GMCnet] Engine AC Compressor Whirring noise [message #251947 is a reply to message #251945] Wed, 11 June 2014 10:46 Go to previous messageGo to next message
Dennis S is currently offline  Dennis S   United States
Messages: 3046
Registered: November 2005
Karma: 2
Senior Member
Neil Fonville wrote on Wed, 11 June 2014 10:39
This is good info to know. I'm not sure I have the skills to do it myself but I have a mechanic coming to help with other issues this weekend. The cooling is good just really noisy. I most likely is the bearing I'm thinking. I just was not wanting to have the Freon removed and recharged.
Thanks...I'll go look for the photos.
Neil
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



Neil
Here are the tools needed

http://www.gmcmhphotos.com/photos/g5593-gmc-ac-compressor-tools.html

Dennis


Dennis S
73 Painted Desert 230
Memphis TN Metro
Re: [GMCnet] Engine AC Compressor Whirring noise [message #251951 is a reply to message #251947] Wed, 11 June 2014 11:25 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
Senior Member
I replaced mine on the coach a few years ago. I do not remember much about doing it other than I needed a puller.

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
Re: [GMCnet] Engine AC Compressor Whirring noise [message #251954 is a reply to message #251937] Wed, 11 June 2014 11:32 Go to previous messageGo to next message
Bob de Kruyff   United States
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
Senior Member
Neil Fonville wrote on Wed, 11 June 2014 07:50
So the engine compressor is making a whirring type noise. Good technical description, right? I think it's the clutch. Is it possible to change the clutch without removing the entire compressor and recharging? I saw it on done on a YouTube video but it was a much new model.
Thanks Neil
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist


Does the noise change if the clutch is engaged vs not engaged?


Bob de Kruyff
78 Eleganza
Chandler, AZ
Re: [GMCnet] Engine AC Compressor Whirring noise [message #251960 is a reply to message #251954] Wed, 11 June 2014 12:15 Go to previous messageGo to next message
Neil Fonville is currently offline  Neil Fonville   
Messages: 68
Registered: May 2014
Karma: 0
Member
So I went to Autozone. They have the parts and the puller. I was asked the same question which was does it do it all the time or just when engaged. It only makes noise while engaged. He thought it would be the internal compressor bearing and most like was making metal in the system. Would need to overhaul/replace compressor and purge the entire system. Sounds logical to me but I'm not an expert either. Thoughts?
Thanks, Neil
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



1975 GMC II Allen, TX
Re: [GMCnet] Engine AC Compressor Whirring noise [message #251965 is a reply to message #251960] Wed, 11 June 2014 13:12 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
Senior Member
Neil Fonville wrote on Wed, 11 June 2014 13:15
So I went to Autozone. They have the parts and the puller. I was asked the same question which was does it do it all the time or just when engaged. It only makes noise while engaged. He thought it would be the internal compressor bearing and most like was making metal in the system. Would need to overhaul/replace compressor and purge the entire system. Sounds logical to me but I'm not an expert either. Thoughts?
Thanks, Neil

Neil,

Without hearing it, I cannot give you much assurance, but out compressor has been making noise when running for about 40K miles. It did seize a clutch bearing once, that was real noisy until the belt parted. (That took less than a minute. Less time than I could find a place to pull off the road.) I think, were I you, I would find an automotive A/C shop and ask them to listen to it.

Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
Re: [GMCnet] Engine AC Compressor Whirring noise [message #251972 is a reply to message #251960] Wed, 11 June 2014 14:28 Go to previous messageGo to next message
Bob de Kruyff   United States
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
Senior Member
Neil Fonville wrote on Wed, 11 June 2014 11:15
So I went to Autozone. They have the parts and the puller. I was asked the same question which was does it do it all the time or just when engaged. It only makes noise while engaged. He thought it would be the internal compressor bearing and most like was making metal in the system. Would need to overhaul/replace compressor and purge the entire system. Sounds logical to me but I'm not an expert either. Thoughts?
Thanks, Neil
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist


They will make some whirring noise while running, but without being there it is hard to diagnose how loud it is. Bearings usually make a different noise so it may be just the internal mechanism. Has it gotten worse lately? Can you here it through the front hatch doors or inside the vehicle?


Bob de Kruyff
78 Eleganza
Chandler, AZ
Re: [GMCnet] Engine AC Compressor Whirring noise [message #251979 is a reply to message #251972] Wed, 11 June 2014 16:52 Go to previous messageGo to next message
Neil Fonville is currently offline  Neil Fonville   
Messages: 68
Registered: May 2014
Karma: 0
Member
Yes, it has got louder over the last hour or two of use. It is much louder
than normal. I have only had the coach a few months but it did not make
enough noise to hear while driving when I drove it home from West Virginia
which was 1000 miles. I do have a mechanic coming over on Saturday so that
should yield more info.
Neil

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



1975 GMC II Allen, TX
Re: [GMCnet] Engine AC Compressor Whirring noise [message #251981 is a reply to message #251979] Wed, 11 June 2014 17:12 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
Senior Member
Please look at the clearance between the front of the clutch and the body brace next to it. Dan had a noise and we changed the compressor only to find that we still had the noise only when engaged. It turned out to be the clutch rubbing on the body brace. A shorter drive belt took care of the situation.

Check it first. You will feel pretty stupid if you change the compressor and still have the problem.


Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
Re: [GMCnet] Engine AC Compressor Whirring noise [message #251987 is a reply to message #251981] Wed, 11 June 2014 18:20 Go to previous message
Neil Fonville is currently offline  Neil Fonville   
Messages: 68
Registered: May 2014
Karma: 0
Member
I will look at that tonight. Thanks.

On 6/11/14, 5:12 PM, "Ken Burton" wrote:

> Please look at the clearance between the front of the clutch and the body
> brace next to it. Dan had a noise and we changed the compressor only to
> find that we still had the noise only when engaged. It turned out to be
> the clutch rubbing on the body brace. A shorter drive belt took care of
> the
> situation.
>
> Check it first. You will feel pretty stupid if you change the compressor
> and still have the problem.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



1975 GMC II Allen, TX
Previous Topic: Spare Tire Cover
Next Topic: [GMCnet] Coca Cola
Goto Forum:
  


Current Time: Sun Oct 13 05:21:42 CDT 2024

Total time taken to generate the page: 0.00962 seconds