Noise from ac belt

greatiliad · Post by **greatiliad** » Fri Jul 28, 2006 1:09 am

2000 daewoo lanos
after I put ad belt on , it always create noise.
at first, only after I turn on the air condition, it create noise for a short while, then everything is ok

then I buy another belt and try, Now, every time I start the car(when the car is cold) It creates noise for a short while(the air condition is off)

but if the car is hot, it sounds normal

before I rebuilt the engine, the air condition worked good.

what can i do ???

daewoomofo · Post by **daewoomofo** » Fri Jul 28, 2006 1:36 am

tighten the belt a little bit more, that might work

greatiliad · Post by **greatiliad** » Fri Jul 28, 2006 1:48 am

daewoomofo wrote:tighten the belt a little bit more, that might work

maybe
that's why the tensioner is designed like that
it is supposed to be much much more tight than alternator belt.

greatiliad · Post by **greatiliad** » Fri Jul 28, 2006 8:44 pm

the noise still there
it is so wired, because every time , after I adjust the tensioner, the noise disappears.
but after the car sit for a while, it comes back when I start the car

MMamdouh · Post by **MMamdouh** » Sat Jul 29, 2006 11:12 am

put a littler axel greas on the A/C belt.

MMamdouh

lanowoo · Post by **lanowoo** » Mon Jul 31, 2006 2:11 pm

wouldn't that make the belt glaze?

greatiliad · Post by **greatiliad** » Mon Jul 31, 2006 2:28 pm

I filed the belt a little bit to remove the glaze part.
It works much better, but I gusee I need take some action to resurface the pulley.
After the belt began to squeal, it polished the pulley, which will casue the belt squeal more easily.

MMamdouh · Post by **MMamdouh** » Mon Jul 31, 2006 5:50 pm

if it is polishing the pully then the pullies might not be aligned... you need to check if all three pullies are alighned or else you will never get rid of the squeal and you will keep on breaking A/C belts.

MMamdouh

greatiliad · Post by **greatiliad** » Mon Jul 31, 2006 11:12 pm

why the pulley will be misalign?
I guess, polishing has nothing to do misalign.
just use some sand paper to abrade the pulley , i guess, will be ok.

MMamdouh · Post by **MMamdouh** » Tue Aug 01, 2006 8:56 am

polishing means friction, if you got one half of a pully really polished then the belt is having too much friction with that side and that causes the sound as well as generates heat and eventually will break your belt and in some severe cases it might also damage the bearings on the components running on that particular belt.

as you have noticed the A/C belt's tensioner is located at the very bottom of the setup so if the car was involved in an accedent or in some cases brutal treatment by a mechanic or so can lead to shifting the tensioner a bit and cause those issues.

MMamdouh

lanowoo · Post by **lanowoo** » Tue Aug 01, 2006 4:47 pm

to check if they are alighned, take a ruler and put against the side and if there is a diffrence, then you know what it is.

greatiliad · Post by **greatiliad** » Tue Aug 08, 2006 12:10 pm

Sorry, finally, I found it is not the ac belt, the noise comes from alternator belt.
I put both new ac and alternator belt on.
at first the ac belt begin to create noise. but after i change the ac belt, the alternator belt began to create noise. but I always assumed that it was ac belt.
that is so .........
it is a new belt, so after severl days, it strenched a little bit.
after I tighten the alternator belt, the noise gone.
thanks you every one.

The original daewootech forum

Noise from ac belt

Noise from ac belt

it is alternator belt