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Old 09-26-2016, 10:58 PM   #1
South
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E39 whistle sound



I have this exact same noise as in this video
I already replaced the CCV and still have it. Anyone know where this "space whistle" is coming from, I can't pinpoint it.

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Old 09-29-2016, 08:23 PM   #2
South
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also i checked everywhere under the hood. no supercharger. so thats ruled out
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97 540i6 AC Shnitzer goodies-DD
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Old 09-30-2016, 09:29 AM   #3
Trekz
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Didnt watch the video, but does it go away when you open to oil cap?

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Old 09-30-2016, 09:56 AM   #4
Blackedout95
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Not exactly the same whistle BUT check the seal around the DISA valve
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Old 10-03-2016, 08:57 PM   #5
South
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Quote:
Originally Posted by Trekz View Post
Didnt watch the video, but does it go away when you open to oil cap?

Sent from my Nexus 5 using Tapatalk
sound still present with oil cap off
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95 325 - m52 swap, M50 manifold, chiped, dinan cai, welded diff - sold
96 328is Madeira violet, Magma Vadar interior, LSD, Hartge kit- sold
99 318ti matt black, m50 stroker, 220 whp- sold
97 540i6 AC Shnitzer goodies-DD
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Old 10-03-2016, 08:58 PM   #6
South
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Quote:
Originally Posted by Blackedout95 View Post
Not exactly the same whistle BUT check the seal around the DISA valve
540s don't't have one
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95 325 - m52 swap, M50 manifold, chiped, dinan cai, welded diff - sold
96 328is Madeira violet, Magma Vadar interior, LSD, Hartge kit- sold
99 318ti matt black, m50 stroker, 220 whp- sold
97 540i6 AC Shnitzer goodies-DD
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Old 10-03-2016, 08:59 PM   #7
South
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The sound is so hard to hear with my head over the engine, but inside the car I hear it just as clear as in that video.
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Old 10-03-2016, 09:49 PM   #8
Blackedout95
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Quote:
Originally Posted by South View Post
540s don't have one
Didn't even notice it was a 540
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Old 10-04-2016, 08:01 AM   #9
Blackedout95
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It could be the start of the crank case vent (tear in diaphragm), while the car is sitting at idle and you have the hood open do you hear the whistle or whine?

If so simply pull the dip stick up while car is running (whistling) and see if the pressure release causes the whistle to drop or change. The job of the vent at the back is do this, release pressure/vent. To get even more sure if it is or is not the ccv at the back of the manifold...simply remove the cover and put your ear to the back of the engine, have a friend blip the throttle and see if the sound comes from there.

Also sounds like it could be a vac. leak, grab some carb cleaner and start to check around the manifold lines (etc).

If all that checks out check your belt and pulleys.

GL
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Old 10-04-2016, 05:45 PM   #10
South
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Quote:
Originally Posted by Blackedout95 View Post
It could be the start of the crank case vent (tear in diaphragm), while the car is sitting at idle and you have the hood open do you hear the whistle or whine?

If so simply pull the dip stick up while car is running (whistling) and see if the pressure release causes the whistle to drop or change. The job of the vent at the back is do this, release pressure/vent. To get even more sure if it is or is not the ccv at the back of the manifold...simply remove the cover and put your ear to the back of the engine, have a friend blip the throttle and see if the sound comes from there.

Also sounds like it could be a vac. leak, grab some carb cleaner and start to check around the manifold lines (etc).

If all that checks out check your belt and pulleys.

GL
Did the dip stick and oil cap test. no change.
Already replaced CCV after researching this 'space whistle'
I did spray brake cleaner around manifold, no change, not sure if its the same as carb cleaner?

On another note, on warmer days there is a 80 percent chance of there being no whistle. Also doesn't matter if engine gets to operating temp, if the whistle is there at startup it stays.

I can barely hear it with my head over the engine.

Ill try unhooking the serpentine belt and see
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95 325 - m52 swap, M50 manifold, chiped, dinan cai, welded diff - sold
96 328is Madeira violet, Magma Vadar interior, LSD, Hartge kit- sold
99 318ti matt black, m50 stroker, 220 whp- sold
97 540i6 AC Shnitzer goodies-DD
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Old 10-04-2016, 07:08 PM   #11
Blackedout95
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Dont like that it stays even when warm that kind of nixes a couple thing, yes cleaner is cleaner

Try belt/pulleys, make sure they spin free or quiet

Let us know, I mean if mainly when cold Id say vac leak some where but even when warm...could still be but...ehh
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Old 10-04-2016, 07:55 PM   #12
shanehutton
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My guess is an air leak. Check all the rubber in the intake very closely. Likely in one of the folds of the accordion looking sections.
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Old 10-08-2016, 11:45 PM   #13
South
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Quote:
Originally Posted by Blackedout95 View Post
Dont like that it stays even when warm that kind of nixes a couple thing, yes cleaner is cleaner

Try belt/pulleys, make sure they spin free or quiet

Let us know, I mean if mainly when cold Id say vac leak some where but even when warm...could still be but...ehh
Not pulleys

Some more info:

1. The sound begins a few seconds after start up. So it must be related to oil pressure?
2. The ccv I replaced had its ornge membrane covered in a hardened layer of oil...for who knows how long....and I know the ccv connects to the oil separator....so I am thinking its the oil seperator now...
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95 325 - m52 swap, M50 manifold, chiped, dinan cai, welded diff - sold
96 328is Madeira violet, Magma Vadar interior, LSD, Hartge kit- sold
99 318ti matt black, m50 stroker, 220 whp- sold
97 540i6 AC Shnitzer goodies-DD
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Old 10-23-2016, 09:10 PM   #14
South
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Sound definitely coming from alternator area. Its probably one of the pulleys...
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95 325 - m52 swap, M50 manifold, chiped, dinan cai, welded diff - sold
96 328is Madeira violet, Magma Vadar interior, LSD, Hartge kit- sold
99 318ti matt black, m50 stroker, 220 whp- sold
97 540i6 AC Shnitzer goodies-DD
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