Some belt under my hood is screaming when I turn up my system loud..

[Basshead808 10+ year member]

Okay when I start up the car at night (Doe's not do it during the day) and I play my system at full volume there is some belt under my hood that just screams so loud that it sounds exactly like a tire screech and it keeps on screeching until I lower the volume of my system down. Could this be a loose alternator belt? what could be wrong?

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[revrider1 5,000+ posts]

Alty problem for sure.

 

[Basshead808 10+ year member]

//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[revrider1 5,000+ posts]

Weird though only at night, when you have you lights running //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif . Maybe the belt is bad have you checked it?

 

[Basshead808 10+ year member]

Well believe it or not revrider1 I just had the belt changed yesterday.. So it is brand new.

 

[revrider1 5,000+ posts]

Maybe the alty is going bad, maybe the pulley.

 

[Basshead808 10+ year member]

Either that or the guy didin't get the new belt on properly. Thanks though revrider1 I definately gots to get it checked out by the place I got it fixed at.

 

[revrider1 5,000+ posts]

Take it back

 

[AcidicDreams 10+ year member]

well if it's truly only when you crank the system it's the alt... does it happen at idle with the stereo cranked...

ohh and it prob happens at night b/c it's colder

if it's not truly related to the stereo's volume and power draw I'd suspect the water pump and not a belt...

does it change with RPM?

 

[cyantist 10+ year member]

It's the alternator for sure.. Either a loose belt or the bearing is going.. Definately bring it back and get it checked..

 

[SyKo13 5,000+ posts]

does the alt pulley spin?? or is there dirt in the pulleys where the belt sits?

 

[ss3079 5,000+ posts]

does it change with RPM?

In my case, yes. At lower RPM's there's a high pitched squeal once in a while, but once you get going at higher RPM's it goes away.

100% my fault for using the stock alt.

 

[MrSector9 10+ year member]

if it didn't do it before and you got the belt changed and now it does it...

give you one guess what it is //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[AcidicDreams 10+ year member]

In my case, yes. At lower RPM's there's a high pitched squeal once in a while, but once you get going at higher RPM's it goes away.
100% my fault for using the stock alt.

I doubt that is a belt, it's either a water pump or your alt pulley.... what kind of car?

 

[revrider1 5,000+ posts]

I say the alty pulley