A/C Compressor Squealin', what gives? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cstanley · 07-14-2006, 09:56 AM

ok. i was charging my system, 3 cans into it before i realized that 1st can was regular r12, not oil charge (i had the system vac'd.) so, on the 3rd can, i kicked on the engine and a/c, to help get the charge in. i get god-awful hollerin' from the belt, because the compressor is only sporadically turning. i checked the vents, and the air was chillin' so i knew the compressor was compressin'.

it was only after this that i realized i had no r12 oil charge in my stash.

did i screw something up real bad?

JimKshortstep4x4 · 07-14-2006, 08:38 PM

Unless the system was dry, I doubt if you hurt anything. More than likely the belt is not tight enough so it is slipping or it is old and glazed as it takes a lot to rotate the compressor.

Jim

chipflyer · 07-14-2006, 09:23 PM

I agree with Jim, probably just a loose belt. It takes a lot of power to turn the old A6 and if the belt is loose it will do what you are describing, especially at idle.

Jeff

cstanley · 07-14-2006, 11:52 PM

thanks, guys.
the belt is definitely old, and a little loose. i'll try a new belt in the morning.

GMC Jim · 07-15-2006, 02:02 AM

you might use a bit of belt dressing. The non-slip feature works fairly well.... Jim

07-14-2006, 09:56 AM	#1
cstanley Senior Member Join Date: Oct 2005 Location: Austin, TX Posts: 1,229	A/C Compressor Squealin', what gives? ok. i was charging my system, 3 cans into it before i realized that 1st can was regular r12, not oil charge (i had the system vac'd.) so, on the 3rd can, i kicked on the engine and a/c, to help get the charge in. i get god-awful hollerin' from the belt, because the compressor is only sporadically turning. i checked the vents, and the air was chillin' so i knew the compressor was compressin'. it was only after this that i realized i had no r12 oil charge in my stash. did i screw something up real bad? __________________ "Anybody who would paint his truck like this, would go to a minister's funeral dressed in feathers!" - Big Enis Burdett '72 Blazer Restoration Blog: http://sportchicken.blogspot.com/ Last edited by cstanley; 07-14-2006 at 09:57 AM.

07-14-2006, 08:38 PM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: A/C Compressor Squealin', what gives? Unless the system was dry, I doubt if you hurt anything. More than likely the belt is not tight enough so it is slipping or it is old and glazed as it takes a lot to rotate the compressor. Jim

07-14-2006, 09:23 PM	#3
chipflyer Registered User Join Date: May 2004 Location: Topeka, Ks Posts: 2,293	Re: A/C Compressor Squealin', what gives? I agree with Jim, probably just a loose belt. It takes a lot of power to turn the old A6 and if the belt is loose it will do what you are describing, especially at idle. Jeff __________________ I'm not a pessimist, I'm just optimistic that bad things are going to happen. 1971 Cheyenne Super K10 - tilt, cruise, air, am/fm, tow hooks, factory buckets! 1986 Jeep J10 pickup, - 5.3L Vortec with 4L60e and NP241.

07-14-2006, 11:52 PM	#4
cstanley Senior Member Join Date: Oct 2005 Location: Austin, TX Posts: 1,229	Re: A/C Compressor Squealin', what gives? thanks, guys. the belt is definitely old, and a little loose. i'll try a new belt in the morning. __________________ "Anybody who would paint his truck like this, would go to a minister's funeral dressed in feathers!" - Big Enis Burdett '72 Blazer Restoration Blog: http://sportchicken.blogspot.com/

07-15-2006, 02:02 AM	#5
GMC Jim Senior Member Join Date: Dec 2002 Location: Portland, Oregon Posts: 901	Re: A/C Compressor Squealin', what gives? you might use a bit of belt dressing. The non-slip feature works fairly well.... Jim __________________ '71 GMC;fleetside;PB/PS/AC/CC/402 Eng./Custom Paint/110,000act miles/3 fuel tanks(52gal). Last edited by GMC Jim; 07-15-2006 at 02:03 AM.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.