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View Full Version : Z4 3.0i - Whistling Sound


keepark
02-03-2009, 11:55 PM
Hi guys,

I have this whistling noise when 1,000~2,000 rpm.
I hear no whistle when it's idling, but when i gently press on the gas pedal, it makes the whistle and the engine revs right after.
I hear it the most when I'm driving in the parking lot, rpm around 2,000 it makes the sound and when it revs up, it disappears. Only whistles on low rpms.

I've already changed the oil separator, and i don't know what else to do.

Any ideas?

Lester
02-16-2009, 05:41 PM
Hi guys,

I have this whistling noise when 1,000~2,000 rpm.
I hear no whistle when it's idling, but when i gently press on the gas pedal, it makes the whistle and the engine revs right after.
I hear it the most when I'm driving in the parking lot, rpm around 2,000 it makes the sound and when it revs up, it disappears. Only whistles on low rpms.

I've already changed the oil separator, and i don't know what else to do.

Any ideas?Cracked intake hose

keepark
02-18-2009, 09:10 PM
Not the Cracked intake hose
Not the Intake Adjuster Unit
Not the Idle control valve or hose around it

Seems like the alternator pulley...or something i don't know.