air conditioning screech??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

coggonobrien · 05-21-2008, 07:23 PM

we've got a 2000 4x4 hd with a 6.0litre and whenever we run the air conditioning the system will create a loud screech often and at random. anybody ever heard of this problem? what would it take to remedy it?

Thanks,
Dave

Huck · 05-31-2008, 03:32 PM

1st---if not recently replaced, buy and install a new serpentine belt. If it has been on for more then 50K miles, the rubber gets hard and looses it's grip on the pulleys causing screech---usually when cold but can continue when warm. Cheap, easy fix
2nd---if you have a recent belt on it, then I would suspect either the A/C compressor clutch acting up or the tensioner pulley bearing getting kaka
3rd--no clue, good luck
Huck

coggonobrien · 05-31-2008, 04:10 PM

Is the clutch something we would be able to replace without doing the entire compressor? If so how big of a pita would it be? thanks

mothertrucker424 · 06-02-2008, 12:58 AM

the tensiner may be week and allows belt to slip mine does the same

ed2552 · 06-02-2008, 06:29 AM

Nope, if it is the clutch, you need a new compressor, get a NEW one, not rebuilt, the rebuilds actually last more than a month about 1/3 of the time

04 orange · 06-03-2008, 11:56 PM

Its the compressor locking up. Remove the orifice tube and you will see all of the trash in the system. Replace the compressor the orifice and flush the lines good. Also check the a/c belt tensioner and make sure its not broke, when its been slipping for a long time those will brake. Ive replace lots of those for that problem.

05-21-2008, 07:23 PM	#1
coggonobrien Registered User Join Date: Mar 2008 Location: Coggon, IA Posts: 580	air conditioning screech??? we've got a 2000 4x4 hd with a 6.0litre and whenever we run the air conditioning the system will create a loud screech often and at random. anybody ever heard of this problem? what would it take to remedy it? Thanks, Dave

05-31-2008, 03:32 PM	#2
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,261	Re: air conditioning screech??? 1st---if not recently replaced, buy and install a new serpentine belt. If it has been on for more then 50K miles, the rubber gets hard and looses it's grip on the pulleys causing screech---usually when cold but can continue when warm. Cheap, easy fix 2nd---if you have a recent belt on it, then I would suspect either the A/C compressor clutch acting up or the tensioner pulley bearing getting kaka 3rd--no clue, good luck Huck

05-31-2008, 04:10 PM	#3
coggonobrien Registered User Join Date: Mar 2008 Location: Coggon, IA Posts: 580	Re: air conditioning screech??? Is the clutch something we would be able to replace without doing the entire compressor? If so how big of a pita would it be? thanks

06-02-2008, 12:58 AM	#4
mothertrucker424 Registered User Join Date: Sep 2006 Location: st pete Posts: 404	Re: air conditioning screech??? the tensiner may be week and allows belt to slip mine does the same __________________ _-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- 1972 K10 4"lift 33"tires (soon to be bigger and better) 2000 silverado 1500 2wd 2"coil spacers3" BL 285/75/16's

06-02-2008, 06:29 AM	#5
ed2552 Registered User Join Date: Jan 2007 Location: Charles City IA Posts: 1,626	Re: air conditioning screech??? Nope, if it is the clutch, you need a new compressor, get a NEW one, not rebuilt, the rebuilds actually last more than a month about 1/3 of the time __________________ '67 C20, Under the Knife!, LWB, Eaton HO-52, Rear Coil Springs 72' GMC C2500, 350, TH400(?), Dana 60 '67 K10 4-spd., 305, SM465, Dana 44, 12 Bolt, RUST! '65 C60 292, 4 spd, 2 spd Rearend, 15' Grain Box, MINT! 09 Yukon Denali 82k Miles 6.2L/6A

06-03-2008, 11:56 PM	#6
04 orange Registered User Join Date: Sep 2006 Location: Midlothian, Tx Posts: 144	Re: air conditioning screech??? Its the compressor locking up. Remove the orifice tube and you will see all of the trash in the system. Replace the compressor the orifice and flush the lines good. Also check the a/c belt tensioner and make sure its not broke, when its been slipping for a long time those will brake. Ive replace lots of those for that problem.



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