AC Belt Squeaks But It Is TIGHT? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ghackett1 · 05-20-2007, 10:10 AM

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.

MT1972cheyenne · 05-20-2007, 11:01 AM

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.

Zeke · 05-20-2007, 11:59 AM

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.

eedgell · 05-20-2007, 01:30 PM

BigTruckDriver · 05-20-2007, 01:45 PM

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.

**Hart_Rod** · 05-20-2007, 02:31 PM

Quote:

Originally Posted by BigTruckDriver

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.

Just tried the soap trick and it worked. Now the question is, how long will it last,

.

r

ghackett1 · 05-20-2007, 02:44 PM

Thanks for the tips. I'll try what was suggested and let everyone know how it turned out. THanks!

BigTruckDriver · 05-20-2007, 03:37 PM

Quote:

Originally Posted by Hart_Rod

Just tried the soap trick and it worked. Now the question is, how long will it last,

.

r

Long enough for you to buy a can of belt dressing

Should last a couple days.

OJOE · 05-20-2007, 06:15 PM

Quote:

Originally Posted by Hart_Rod

Just tried the soap trick and it worked. Now the question is, how long will it last,

.

r

MAYBE UNTIL IT NEEDS A NEW BATH, GET THE SOAP. HA HA

ghackett1 · 05-20-2007, 07:33 PM

FIXED IT!! I got a wider belt and also sanded the inside of the pulley grooves. Not one squeak, perfect. Thanks for the help.

05-20-2007, 10:10 AM	#1
ghackett1 68 C10 Longbed Join Date: Sep 2006 Location: Naples, Florida Posts: 520	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.

05-20-2007, 11:01 AM	#2
MT1972cheyenne Registered User Join Date: Dec 2006 Location: Montana Posts: 223	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.

05-20-2007, 11:59 AM	#3
Zeke Active Member Join Date: Jun 2002 Location: L.A. Lower Alabama Posts: 453	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

05-20-2007, 01:30 PM	#4
eedgell It's the air up here Join Date: Mar 2007 Location: Western Colorado Posts: 710	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

05-20-2007, 01:45 PM	#5
BigTruckDriver Registered User Join Date: Apr 2007 Location: Dallas Posts: 156	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.

05-20-2007, 02:44 PM	#7
ghackett1 68 C10 Longbed Join Date: Sep 2006 Location: Naples, Florida Posts: 520	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.

05-20-2007, 07:33 PM	#10
ghackett1 68 C10 Longbed Join Date: Sep 2006 Location: Naples, Florida Posts: 520	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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