weird whistling sound??

[cul202]

before anyone says 'turbos make a whistling sound' its not that

2 days ago it started making a sound that is similar to the sound of blowing over the top of an empty beer bottle. it happens at around 2300rpm to 2800.

i've never heard a car make this noise before i cant seem to find it. i spose it could be a vac/exhaust leak..?

sound familiar to anyone?

[Bobjones]

Check the BOV gasket, you may have a VERY slight boost leak...that is if it happens all the way through the rev range!!

[coco69]

yeah i agree with bobjones.

the screw on my bov was overthreaded and allowed a slight boost leak thru the gasket, made the noise you are talking about, (blowing over beer bottle), but did it all the way thru the revrange when on boost.

i fixed it up, by re-tapping the screw hole, thus making the bov sit tighter and fixing the leak thru the gasket at that point.