Problem with drive belt. Need Help!

[Macdaddy1]

I went to advanced auto and got the small belt went home and it was to small so went back and got the larger belt and it felt perfect.

[ls1nova71]

Originally Posted by Jstock85

What alternator goes with that one?

It's the smaller one. He posted a pic of it in post #8, notice how much smaller it is than yours.

[Jstock85]

Originally Posted by Macdaddy1

I went to advanced auto and got the small belt went home and it was to small so went back and got the larger belt and it felt perfect.

Thanks. I may end up having to do that!

[Jstock85]

Originally Posted by ls1nova71

It's the smaller one. He posted a pic of it in post #8, notice how much smaller it is than yours.

Ok I see what your saying. Do you know if changing alternators would be a direct fit? Meaning same plug for the wiring harness? Same dimensions to fit in the bracket?

[Jstock85]

Originally Posted by mongocanfly

His looks like mine dude...

You mind sharing some info on your alternator? Brand, PN that sort of thing.

Thanks

[87chevy.com]

Forcing the belt on like you did means it's the wrong belt period. You are guaranteed to prematirealy wear out some bearings. Just take that belt off and go to the parts store and ask for 3 belts, each 1/2 longer... return the ones you don't use... simple.

[mongocanfly]

Jstock...mine is a 105amp....
The numbers on it are...15755616W. 105A 111623 12V N

But I wouldn't change anything but the belt...if that's the jssue

[Jstock85]

Originally Posted by mongocanfly

Jstock...mine is a 105amp....
The numbers on it are...15755616W. 105A 111623 12V N

But I wouldn't change anything but the belt...if that's the jssue

Will do. Thanks again for your help!!

[Steve Cole]

Did you get this issue resolved?

[Jstock85]

Originally Posted by Steve Cole

Did you get this issue resolved?

Yes and no. I got the belt on by unbolting the alternator and tapping it down some and bolting it back down. Was then able to take the belt off but again could not get it back on. I still do not know the cause of this issue because I reused all the original parts from the teardown. Another member recommended buy several drive belts of different lengths, finding the one I need, and returning the rest. That is probably what I will end up doing.

[Steve Cole]

Originally Posted by Jstock85

Yes and no. I got the belt on by unbolting the alternator and tapping it down some and bolting it back down. Was then able to take the belt off but again could not get it back on. I still do not know the cause of this issue because I reused all the original parts from the teardown. Another member recommended buy several drive belts of different lengths, finding the one I need, and returning the rest. That is probably what I will end up doing.

Thanks for the reply, I wanted to check because I am having the same problem as you. Original components, original belt. The only difference was a replacement water pump but the "pulley", (for lack of a better word), was the same size. Suddenly. The belt no longer fits. This can't be coincidence.

[Jstock85]

I have no explanation! I took the parts off clean and painted and put them back on had problems. I put new gaskets and seals on the water pump and power steering pump. Im gonna go the route of trying a couple different belts until I get the right one instead of swapping alternators. Good luck with yours!

[68c10airstream]

Been there done that. When i changed from the 105 amp alternator with an oem stock belt to the optional 140 amp larger diameter alternator i used i believe a 1" longer belt to make it right. I went to the parts store with the old stock one, measured, looked up the application and got the longer optional one and no issue, it is perfect. This is on a 2003 5.3

[truckdude239]

im being serious you have the wrong idler pulley on there , i work on these things every day i bet if you got this pully im linking from advance you woul not have a problem getting the belt on

https://shop.advanceautoparts.com/p/...67a/10150983-P

[truckdude239]

Look at the pulley gaurds first pic is yours there is a big gap between the gaurd and pulley second pic shows the proper pulley with no gap

[Jstock85]

ill take a look into that also. Thanks Dude

[4x4k30]

does this pulley that's in the yellow pic spin or is it not spinning ? also in the yellow pic this pulley should have a spacer behind it . and also check the tension pulley sometimes it will over center and cause the spring tensioner to bind up and only will go so far. and if all that's ok .loosen up the 3bolts where the spring tensioner goes to the block it will give you a little more room to mount the belt .

[Jstock85]

ill double check the tension pulley but the idle pulley is working as it should