Whistling sound from engine bay

[qudernkl]

Just curious whether anyone had this issue before on their E46? I heard this sound on and off from the engine bay even while am driving.

 

[laneza]

only at the begining? or all the way u drive?

 

[qudernkl]

It happens by the time I start the car and while am driving.

 

[benjichris88]

i got the same sound too but i think its from the air cond..
asked my mech but he say theres no prob..
not sure..

can anyone help us with this...

 

[loafer]

Could be a punctured hose somewhere. Last time I heard a whistling sound it came from one of the hoses connected to my brake booster. Change the punctured hose and it's all good. I'm driving a E36 btw.

You'll need to listen closely to see which area in your engine bay the whistling sound is coming from first before a proper diagnose can be done.

 

[laneza]

aircond belt sound?

 

[qudernkl]

Hope nothing puncutured..
loafer, how much the brake booster hose cost u anyway?

Dont think is air cond belt sound...hmm...

 

[nikrazali]

mine happen at first engine start or the engine is cold and the whistling sound appear about 1 minute..I don't know what the problem is..i just ignore the whistling sound. Anyone has same experience on this?

 

[Asrul Shamin]

mine whistling on the left side...last time occurred once but goes off for awhile..now happen again..

 

[shk318]

maybe can check the power steering pump:top: