High-Pitched "Whistle" / "Whine" / "Squeal" at Idle(S14 SR20DET)

[ArcherV20]

*VIDEO POSTED BELOW*

Hey guys,

I've got a 1995 240SX with an S14 SR20DET in it. About 88,XXX KM's -- and as of late, there has been a rather high pitched whistle noise coming from the engine bay. Unfortunatly I cannot pin point the location of the sound, but hopefully you guys can give me a few things to check.

The noise only occurs when I'm idle, and only after (10 - 15 mins) a little bit of driving. The pitch does not change with the engine idle, it's just a constant noise. Imagine someone in a really high pitched voice going "BEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEP" in your ear. This has become my life, I can make it go away by blipping my throttle, but aside from that I've done one thing to check on it:

I figure it might be a little bit of gas escaping the exhaust manifold (as I had pulled this out last summer) -- I pulled all my piping out today and tightened the hell out of the bolts on the manifold. Drove around, and the sound occured again - I'm thinking it might be the belts? It doesn't sound like squeaky belts though, or could it be a water pump :|

I'm stumped!
Modified by ArcherV20 at 2:59 PM 7/17/2009

[duffman1278]

Check all your piping, it might be air leaking from some small gap.

[s14tan]

Check all your piping, it might be air leaking from some small gap.

And also check to see if your BOV isn't stuck open slightly.

[the converted]

Have you checked your turbo? Other than that start putting a big screwdriver on various parts of the engine and put your ear on the other end. You'll be able to hear it louder the closer you are to the noise.

[ArcherV20]

I'll try these things out and let you guys know.

--

Nobody thinks it's the water pump? :3

[the.rise]

the current location of my autozone cone air filter mated to the stock rubber piping to the turbo actually makes a bit of a whistle noise at idle. i mean i could be having the same problem as you and never know, but the whistle started with when i put the filter on.

[ArcherV20]

Now with Video:

http://www.youtube.com/watch?v=3ohQ0GJhLHY

You guys can see that it's really quite annoyingly loud at idle, then when I blip the throttle, it goes away, once the engine settles the whine comes back.

Any other ideas on this?

(Piping is secure. I don't know how to check if my BOV is stuck open slightly, will google it now)

[ArcherV20]

Bump.

[kal-el540]

Bump, Did you ever find what was causing the whinning noise?