High pitched wine from engine bay

[ratrod13]

Hi,

I'm from The Netherlands, Europe and have a really anoying high pitched wine coming from the engine bay (drivers side) on my 1994 Explorer. It appears after the engine warms up, and is there when standing still or driving with my explorer. Sometimes it droppes away and than appears again with a short higher pitch and than again the high pitched sound.
When i give drive away it is temporarily away but then it appears again.

It seems to me the sound is coming from the drivers side of the engine, above the exhaust...

I already checked :
The belt
The IAC, it runs better with the new one, but the sound stays there.

Anyone a idea?

 

[Turdle]

Is it a whistling type of noise, or is it more of a bearing going bad ( squeaking) type of noise?

Is it like this?


http://homepage.mac.com/dogfriend/Explorer/iMovieTheater14.html

 

[ratrod13]

Is it a whistling type of noise, or is it more of a bearing going bad ( squeaking) type of noise?

Is it like this?


http://homepage.mac.com/dogfriend/Explorer/iMovieTheater14.html

It is more like a whistling sound, but not like the woooo sound, more hight pitched than that sound.

It is not a bearing sound....

 

[Turdle]

Europe=confusing for me

Is yours right or left hand drive? Just for clarity. You referenced driver side.

 

[ratrod13]

It is a left hand drive , only in England they drive on the other side...

 

[91exploreron37]

Could more than likely be the idler pulley mine did the same thing.

 

[91exploreron37]

It is a left hand drive , only in England they drive on the other side...

Awww man that'd be awesome to have a right hand drive explorer.

 

[ratrod13]

Could more than likely be the idler pulley mine did the same thing.

I'm gonna look in my manual wat the idler pulley is and look at it...but the sound is more coming from the left side of the engine, so i'm thinking of a vacuum leak?

 

[91exploreron37]

Also when you rev the engine while its in nuetral does the sound get higher pitched then go away.

 

[ratrod13]

Also when you rev the engine while its in nuetral does the sound get higher pitched then go away.

When i rev the engine in neutral, the sound is (sometimes not directly) going away and than a second later it appears again.
When waiting in gear for a stoplight the sound get sometimes higher pitched...

So you still think it's the idler pulley? I'm gonna look at first thing in the morning...

 

[91exploreron37]

Yep thats exactly what mine did and its annoying as hell.

 

[ratrod13]

Yep thats exactly what mine did and its annoying as hell.

Yes it's really annoying, even with the radio loud on it's making me crazy!

 

[Willard]

Does it ever randomly "moan" when cruising, mine did that on it's way out, along with sqeaking most of the time.

 

[91exploreron37]

Was yours the one that came apart and threw the belt off.

 

[djsk8r33]

power steering pump?

 

[ratrod13]

Was yours the one that came apart and threw the belt off.

Nop that's not mine...

But i fixed the problem today! It was a leak in my crankcase ventilation filter ( i don't have a stock airfilter)...wo guesed that would make this horrible noise?!

for al the help and tips!