JasonYo

So when my engine is warm and only at idle it starts to make this high pitch whistling/squeaking noise. I know that it is not any of the belts or the intake. It is also not any of the vaccume hoses on the intake manifold.

Heres a video to see what it sounds like. You can hear it really well towards the end.

http://www.youtube.com/watch?v=VINMLaXpU4o



If anyone knows what it could be please help, it is the most annoying thing ever! And I cannot figure this out! Thanks.

_eg6_

man thats a tough one gl

JasonYo

Ya I know lol. thanks.

Former User

Sounds like a bad pulley bearing. Use an inexpensive engine stethoscope to pinpoint the noise.

JasonYo

Alright I'll try to check those out.

b1u3_5i

Also check your alternator. If you can, start eliminating a/c, altrernator, p/s belts one by one, and see if the sound goes away. I hope this helps.

JasonYo

Well I don't have a/c, and I ran the engine with the alternator belt off so it's not that.

I might try disconnecting the p/s belt to see if its that.

itsmejto

cheap stethoscope = piece of hose.

JasonYo

Hmm yes, good idea!

I'll try to pinpoint the noise first, but I did listen very carefully for a while the other day and it seems to be coming from the cam pulley area or just behind. The noise is clearly not from the p/s area.

Is it possible that the timing belt is to tight or something?

Or could the pulleys be making this noise?

Atomic1

Try squeezing your pcv hose when it's making the noise.

Hill4589

Agreed. And I wanted to compliment you on how clean the engine bay is!

BrandonR

Honestly, it sounds like air whistling as it goes through the IACV passages. If you notice it only whines when the IACV opens up. I had a 5.0 Mustang that did that, as well as many other 5.0's. Take off your IACV and sand the sharp edges down slightly.

blackKready

yeah its definitely air. soon as you give it even the littlest throttle it goes away.

JasonYo

I'll check the IACV, I was told it was a air leak or something for sure.

JasonYo

Thanks! I try to keep it as clean as possible.

Former User

The locations of the sound and IACV aren't a good fit.

JasonYo

Yeah, well the sound is more towards the rear drivers side of the engine. It's not at all near the tb. So it's probably not that.

Former User

Sounds like the alternator. As already mentioned, remove the alt belt to see if the sound goes away.

JasonYo

Yeah I did that and the sound didn't go away!

A lot of people have been telling me that it sounds like a air leak, not bad bearings. I don't know tho.

JasonYo

Someone said that it could be a intake valve leaking. Is this possible?

Former User

Seriously, I paid only $4 for an engine stethoscope at Harbor Freight Tools.

JasonYo

Well I'll get one it's just that I work everyday except sunday and I can only work on my car at night. Stores are pretty much closed when I'm off.

I guess i'll just wait until then.

JasonYo

Any more Ideas as to what this might be?

Still haven't figured it out, and don't have the time to do anything big like take my engine apart. =/

Dymond

That's a clean *** engine bay
+1

JasonYo

Thanks!