High pitch whistle sound when let gas go
 

hi guys,

mine is a 2007 A6 basic, no turbo.

sound comes from front somewhere under the hood, this only happens when the car is totally warmed up, first 5 miles driving only. the sound disappears after about 5 miles driving, almost unnoticeable sound when fully stopped. no difference if I put in neutral or in drive.

sounds like a bearing/pulley of some sort, I replaced idler pulley and belt tensioner, no luck.

please help.

anyone? help!

What engine do you have?

Kevin,

2007 C6 3.2L 4F engine