Questionhi , thanks for the help ahead of time. well i bought a 1992 gmc suburban 5.7L . it is a salvaged vehicle. runs good, looks good. i replaced the ac pump, orifice tube, and the dryer i think, its the little aluminum canister on the firewall . i had it done at a shop, and they charged it with r 134a. it cools and seems to work fine, but the belt comes off the pully at the ac pump. ive gone through 3 belts. one belt was a little smaller than the one it called for, because the one it calls for seems loose. the belt tensioner is maxed out and the belt seems to slap around between the crank pulley, and the ac pump, when the ac is on. i have noticed when i have someone turn on the ac the pump pulley or clutch stops for a fraction of a second, i think thats what causes the belt to come off. but what causes the pump to stop? anyway, any help is appreciated. thanks.
AnswerEither the belt is to loose or the belt is incorrectly routed around the components it drives or the compressor is on it's way to seizing up.
The main cause for wearing out belts so fast is that one or more of the components is mis-aligned from the rest of the components and or the belt is to loose, There are indicator marks on the tensioner so make sure you get a belt that when installed is in between these marks.
Getting all of the components lined up exactly is a challenge especially on a re-constructed vehicle. With patience it can be done.
What state do you live in, If you don't mind my asking ?.
PLEASE keep your questions on the ALLEXPERTS BOARD because without it, Us volunteers would NOT be needed.
I do not have a staff of people helping me answer your questions, I do it all by myself, except some typing help from my wife or son as the old fingers just don't flex as well as they used to. Therefore, Due to being retired and an OLD computer, That is so old it does not even have SPELL CHECKER on it and being on a dial-up connection, Please excuse the TYPO'S.
I do my best to respond to questions within 4 to 5 hours, But due to the volume of questions I receive on a daily basis I answer them ASAP. If you require a faster response you can e-mail me directly at the below e-mail address as I check it more frequently.:
meperganfortis@msn.com
When you are asked to RATE THIS EXPERT the site it only allows for about 10 (TEN) words. Therefore, I never get to read your full response. You can e-mail me directly at the above said personal e-mail site. But make sure that you RATE ME before e-mailing me directly if you so desire to do so.
Sometimes when you have to replace a part, I will ask you if I can have the old part, As my son and I rebuild them and sell them for extra income. I will pay the shipping costs as long as it does not exceed $10.00.
There are also times that you have some written information that you just don't understand or need help with it, You can e-mail it to me at the above siad e-mail address or you can fax it to me, But contact me FIRST at the e-mail address and I will give you my fax #. However, Again due to my OLD computer I have to log off from the dial up service in order to receive any faxes on my seperate fax machine.
I am alway in need of Car, Truck and SUV service manuals as well as MOTORS MANUALS and if you would like to donate any that you have, I will be more than happy to pay REASONABLE shipping to get them. I do not want any Chilton or Hayes manuals as I personally do not like them as the information contained in them is very mis-leading in my opinion.
Retired in New Mexico and teaching my son to learn the trade.
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