Home » Public Forums » GMCnet » Re: [GMCnet] Request assistance identifying likel culprit
| Re: [GMCnet] Request assistance identifying likel culprit [message #250241] |
Tue, 20 May 2014 23:51  |
james Ernst
Messages: 79
Registered: December 2013
Location: Lincoln, NE
Karma: -4
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Member |
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Hi John, from what you describe it sounds like a frozen pulley on the a/c
compressor and or frozen compressor altogether. Let us all know what you
fing out please.
Jim E.
On May 20, 2014 6:04 PM, "John Novicki" wrote:
> Dear Friends,
>
> Having driven our "new" GMC very little since it came home (about 2 months
> ago), I felt it was time to take it on a short trip preparatory to taking
> it any distance. During the last few weekly start ups, I noticed an
> increasing "belt" sound. Today, I set aside some time to go down and
> tighten
> what I assumed was the alternator belt - as putting a load on the
> alternator seemed to exacerbate the noise. Sure enough, the belt was
> somewhat loose
> - perhaps deflecting 2 inches.
>
> I figured out how to undo the alternator and with my son pulling on a
> large lever, we tightened the alternator so it deflects about 1/2 inch,
> perhaps
> a hair more.
>
> Start up and VERY loud noise. Shut things down quickly. The Alternator
> belt is warm, the AC belt is HOT. Dash heater/AC controls were set to
> "defrost" then
> "off."
>
> Took out the magic elf box (smart phone) and video recorded another start
> up. (Happy how it starts right up) Would you experienced souls take a look
> and listen? I don't think its the alternator belt as the sound seems to
> be coming from the passenger side. My son went outside of the coach and
> confirmed that from the outside front it sounded like the passenger side.
>
> The dash AC does hot work (coach has 3 roof top units) and the air intake
> under the "hood" is blocked off to stop drafts I suppose.
>
> Video http://www.replications.com/gmc/20140520.mp4
>
> Thank you very much for your time and consideration,
>
> John
> --
> John Novicki
> near Gettysburg, Pa
>
> '75 Glenbrook 26'
>
> '73 ex-Glacier 26' soon going to the desert
>
> '39/'46 Austin 8 Van needs new home
> http://www.replications.com/austin8/Austin8Van_1of9.jpg
> _______________________________________________
> GMCnet mailing list
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Jimbalaya
No Coach yet
60 Olds 88
66 Toro
76 Toro
86 cutlass Supreme
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| Re: [GMCnet] Request assistance identifying likel culprit [message #250252 is a reply to message #250241] |
Wed, 21 May 2014 07:58  |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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sorry , i have not been able to follow
but
if it is a stock , gmc, with stock belts, you can just
cut the belt off and go on without ac until you have time to fix the
problem.
erf
On Tue, May 20, 2014 at 9:51 PM, james Ernst wrote:
> Hi John, from what you describe it sounds like a frozen pulley on the a/c
> compressor and or frozen compressor altogether. Let us all know what you
> fing out please.
>
> Jim E.
> On May 20, 2014 6:04 PM, "John Novicki" wrote:
>
>> Dear Friends,
>>
>> Having driven our "new" GMC very little since it came home (about 2
> months
>> ago), I felt it was time to take it on a short trip preparatory to taking
>> it any distance. During the last few weekly start ups, I noticed an
>> increasing "belt" sound. Today, I set aside some time to go down and
>> tighten
>> what I assumed was the alternator belt - as putting a load on the
>> alternator seemed to exacerbate the noise. Sure enough, the belt was
>> somewhat loose
>> - perhaps deflecting 2 inches.
>>
>> I figured out how to undo the alternator and with my son pulling on a
>> large lever, we tightened the alternator so it deflects about 1/2 inch,
>> perhaps
>> a hair more.
>>
>> Start up and VERY loud noise. Shut things down quickly. The Alternator
>> belt is warm, the AC belt is HOT. Dash heater/AC controls were set to
>> "defrost" then
>> "off."
>>
>> Took out the magic elf box (smart phone) and video recorded another start
>> up. (Happy how it starts right up) Would you experienced souls take a
> look
>> and listen? I don't think its the alternator belt as the sound seems to
>> be coming from the passenger side. My son went outside of the coach and
>> confirmed that from the outside front it sounded like the passenger side.
>>
>> The dash AC does hot work (coach has 3 roof top units) and the air intake
>> under the "hood" is blocked off to stop drafts I suppose.
>>
>> Video http://www.replications.com/gmc/20140520.mp4
>>
>> Thank you very much for your time and consideration,
>>
>> John
>> --
>> John Novicki
>> near Gettysburg, Pa
>>
>> '75 Glenbrook 26'
>>
>> '73 ex-Glacier 26' soon going to the desert
>>
>> '39/'46 Austin 8 Van needs new home
>> http://www.replications.com/austin8/Austin8Van_1of9.jpg
>> _______________________________________________
>> 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
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: [GMCnet] Request assistance identifying likel culprit [message #250256 is a reply to message #250241] |
Wed, 21 May 2014 08:43 |
verg
Messages: 54
Registered: September 2006
Location: Gettysburg, PA
Karma: 0
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Member |
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Before I left for work this morning, I took a look at the belts and confirmed the AC belt is worn more than the other belts - far more. As worn as it is it should be replaced, I would think. When I get home, I will take Gene's suggestion first and simply cut it off. If that is the issue, it's diagnosed and I know where to go next. If, after cutting the belt out, the noise is still there, we have more things to check. The belt would have to replaced in any event.
As always, I very much appreciate the warm regard shared by most on this forum. I have lurked here for seven years and felt well able to judge my recent attempt at picking out a good coach.
Thank you all
John
John Novicki
near Gettysburg, Pa
Looking for Glenbrook Yellow Plaid Material
'75 Glenbrook 26' "Bumble"
'86 300SL
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| Re: [GMCnet] Request assistance identifying likel culprit [message #250270 is a reply to message #250256] |
Wed, 21 May 2014 16:30 |
verg
Messages: 54
Registered: September 2006
Location: Gettysburg, PA
Karma: 0
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Member |
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Well, that was rather anti-climactic. Fretted all day that I had bought into some aggravating issue (I am sure those will come in time). Got home, snipped the A/C belt. The belt was stuck to the pulleys. After wrestling the belt off, I gave the two pumps to the gas pedal and the engine fired right up. No noise other than the desired whirring, rumbling and happy big block singing that "red neck lullaby."
After realizing my worst fears were just that fears, I shut the engine down and put a wrench on the A/C compressor. No big surprise, it was not moving for love or money. I will put a working dash air system down on my bucket list of fixes after the bearings, brakes and lines, fuel lines, quad bags, etc.
The coach has three roof A/Cs so I'm not too worried as long as the barbarian keeps running in the back.
Thank you very much to all those who contributed to the diagnostic and expedient fix.
John
John Novicki
near Gettysburg, Pa
Looking for Glenbrook Yellow Plaid Material
'75 Glenbrook 26' "Bumble"
'86 300SL
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