My v belt is squealing really bad on my 620

[72MAMBA]

My belt on my 72 620 is making a loud squealing sound every time i start it up can i get help with this..

[flatcat19]

Yeah.

Tighten it.

[metalmonkey47]

If it's tight, check for cracking and/or dry rotted material.

 

Probably just loose to be honest.

[banzai510(hainz)]

if its loose to loose they get nice and shiny.

try getting a new one and tighten it.

[]2eDeYe]

If it is already tight you might have a bearing going out in your alternator or water pump.

[FiveSeventyZee]

2eDeYe' timestamp='1347545628' post='756516']

If it is already tight you might have a bearing going out in your alternator or water pump.

 

how does that cause the belt to squeal? Im not trying to be a dick and call you out on something, I have squealing issues myself and mine is tight

[67411sss]

how does that cause the belt to squeal? Im not trying to be a dick and call you out on something, I have squealing issues myself and mine is tight

I think he means the bearing in the alternator is squealing not the belt, i have the same thing going on with my 4 runner

[banzai510(hainz)]

you could alwasy take the belt off and try to spin the water pump and the alternator and see if soemthing is getting hard to turn.

[]2eDeYe]

 

 

how does that cause the belt to squeal? Im not trying to be a dick and call you out on something, I have squealing issues myself and mine is tight

 

I think he means the bearing in the alternator is squealing not the belt, i have the same thing going on with my 4 runner

 

If the alternator or water pump aren't spinning and the belt is, it's gonna squeal and eventually burn up the belt. The bearing can squeal also, either way it's not always just a loose belt. :)

[datsunaholic]

If the bearing in the water pump, alternator, goes bad, it's more of a drag than a good bearing. The dragging pully ends up using the belt as a clutch. The more load on the device, the easier it is for the belt to break loose and squeal.

 

Plus, if the bearing is going bad the pulley will end up out of alignment and that too can make it squeal, though that eventually tears up the belt sides. Sometimes. Usually the component breaks first, like when my power steering idler pulley siezed on the freeway. Belt bits everywhere. Had all of 2 seconds warning before the belt came off and wrapped around the crank pulley, ripping the alternator belt off too. Tow truck time...