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05-20-2007, 10:10 AM
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#1 |
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68 C10 Longbed
 
Join Date: Sep 2006
Location: Naples, Florida
Posts: 518
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AC Belt Squeaks But It Is TIGHT?
Hey guys, quick question, when I switch my a/c on in my 71 pick up with a 402 engine, it squeaks like crazy but if I play with the gas a little it will go away until I stop and try and take off and it will start shrieking again. I checked the belt and it seems plenty tight. I do notice that it is a narrow type belt (I replaced it) and seems to fit way down into the pulley. Do you think a wider belt would be the way to go so it would catch the sides of the pulley better, or whatever your thoughts are I'd appreciate because its HOT down here.
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05-20-2007, 11:01 AM
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#2 |
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Registered User
Join Date: Dec 2006
Location: Montana
Posts: 223
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Re: AC Belt Squeaks But It Is TIGHT?
I had a 72 that was like that. I checked out the r-12 charge to make sure the pressures were correct. They were. I then put on a new belt, because they get hard & glaze over. It still squealed some. I looked at the compressor pulley and it was SO shiny & smooth, so I sanded the v surface with about 320 grit to break the surface glaze, and that solved it. The belt had to be real tight too.
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05-20-2007, 11:59 AM
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#3 |
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Active Member
 Join Date: Jun 2002
Location: L.A. Lower Alabama
Posts: 453
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Re: AC Belt Squeaks But It Is TIGHT?
If the belt sets too far in the pulley and rides in the bottom of the "V" it will slip no matter how tight you get it. I'd get a wider belt so it rides on the sides of the "V" and sand to break the glaze as MT1972 suggested.
__________________
1969 C10 350 3spd 1995 GMC 3500 XC 350 dually When Thomas Edison worked late into the night on the electric light, he had to do it by gas lamp or candle. I'm sure it made the work seem that much more urgent. George Carlin |
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05-20-2007, 01:30 PM
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#4 |
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It's the air up here
Join Date: Mar 2007
Location: Western Colorado
Posts: 710
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Re: AC Belt Squeaks But It Is TIGHT?
__________________
1971 cheyenne k10 4 speed np 205 454 BB factory a/c  Never drink down stream of the herd! Eric |
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05-20-2007, 01:45 PM
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#5 |
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Registered User
Join Date: Apr 2007
Location: Dallas
Posts: 156
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Re: AC Belt Squeaks But It Is TIGHT?
Use some belt dressing . The cheapest thing is to get a bar of soap and while running push it against the belt (inside of belt). BE VERY CAREFUL!!!!!!!!!!!!!!
You can get hurt. Also its not a good idea to run your belt as tight as you can get it. It could ruin you ac,alt,water pump,or power steering pump pulleys. It will put a great load on the bearings. |
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05-20-2007, 02:31 PM
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#6 | |
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*************
Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,859
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Re: AC Belt Squeaks But It Is TIGHT?
Quote:
 .r
__________________
Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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05-20-2007, 02:44 PM
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#7 |
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68 C10 Longbed
Join Date: Sep 2006
Location: Naples, Florida
Posts: 518
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Re: AC Belt Squeaks But It Is TIGHT?
Thanks for the tips. I'll try what was suggested and let everyone know how it turned out. THanks!
Last edited by ghackett1; 05-20-2007 at 02:55 PM. |
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05-20-2007, 03:37 PM
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#8 | |
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Registered User
Join Date: Apr 2007
Location: Dallas
Posts: 156
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Re: AC Belt Squeaks But It Is TIGHT?
Quote:
 Should last a couple days. |
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05-20-2007, 06:15 PM
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#9 | |
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Crew Cut
Join Date: Dec 2005
Location: MONTGOMERY,AL
Posts: 757
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Re: AC Belt Squeaks But It Is TIGHT?
Quote:
__________________
85 SWB 1/2 TON CREWCAB/5.3 03 CHEV 3500 DURAMAX CREW CAB 85 CHEV SWB/TPI 06 CHEV TAHOE (WIFES) 30 MODEL A HOT ROD 07 HARLEY DAVIDSON BAGGER 09 STREET GLIDE AN  D A LOT MORE JUNK
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05-20-2007, 07:33 PM
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#10 |
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68 C10 Longbed
Join Date: Sep 2006
Location: Naples, Florida
Posts: 518
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Re: AC Belt Squeaks But It Is TIGHT?
FIXED IT!! I got a wider belt and also sanded the inside of the pulley grooves. Not one squeak, perfect. Thanks for the help.
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