High pitched squeal under the hood

[DrK MrK iV]

I installed a 70mm TB and C&L plenum, but now I have this highpitched squeal. Anyone else had this problem? What could it be? I kinda want some info before I go root around in the engine looking for stuff. Thanks.

 

[poolee]

Is it your belt? I've gone through those things like a fat lady through chocolates.

 

[DrK MrK iV]

Is it your belt? I've gone through those things like a fat lady through chocolates.

I've only got 2500 miles on the car.
Could it be a leak somewhere?

 

[Yellow01GT]

I had a high-pitched squeal going on under the hood...turned out it was the alternator pulley. Not saying that that's what it is, but it might be a possibility.

 

[twogts4us]

I've heard the C&L plenum produces a whistle for some people - is this what you're hearing...?

 

[DrK MrK iV]

I've heard the C&L plenum produces a whistle for some people - is this what you're hearing...?

More like a high pitched whistle than a whistle. I'll go out and tighten everything down and see what it is.

 

[281Ponies]

Idler Pulley went out on me, that thing had a high pitch squeal/whistle.
Is the noise coming from the top of the engine (plenum) or somewhere else?

-Cale