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Thread: Engine harmonic sound (wrup...wrup...wrup...wrup)

  1. #1
    Join Date
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    New to the forum and need help with an engine harmonic (wrup...wrup...wrup...wrup) sound on my 2000 e39 M5 that has just over 92K miles.

    The sound starts just below 1.5K rpm and is present up through the 2.5K rpm range. It seems to be the loudest and more constant at 2K rpms. The sound can be replicated while at a standstill and while driving. However, it becomes very apparent/present when driving on the freeway at 65 mph just over 2K rpms. The sound disappears as the rpms get closer to 3K range.

    YouTube link to hear the sound clip... https://www.youtube.com/watch?v=lpO3yCVcqhw

    Thanks in advance for your help.
    Last edited by MihaNina; 03-16-2016 at 12:23 AM.

  2. #2
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    Can you take a video/sound clip from under the car? Hard to tell from inside the car. Originally I thought it was the fan & fan clutch.

    Does it sound like this?
    https://www.youtube.com/watch?v=3ozgkCzcJdM
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  3. #3
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    Thanks for the reply jdauria. Doesn't sound like the clip you uploaded. The car is going into the shop tomorrow. Hopefully they'll be able to pin point the noise.

  4. #4
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    I actually have the same noise in my car. At first I thought it was the harmonic vibrations from the oil filter housing transmitting through the car, but I ruled that out after replacing the mount. Let us know if you find out what causes it! It can be rather annoying on long highway trips..

  5. #5
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    Any update? I just started noticing this noise now too haha.
    2016 328ix | Wagon | M-Sport | Alpine White | Black | iND | 513M | AC Schnizter | MPerformance |
    2005 330CiC | Sparkling Graphite | Black | 6MT | ZHP
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  6. #6
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    Haven't heard from the shop. Will update when the issue is resolved.

  7. #7
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    I had the noise yesterday, it wasn't as pronounced as yours, but on my way to work today it wasn't there.
    2016 328ix | Wagon | M-Sport | Alpine White | Black | iND | 513M | AC Schnizter | MPerformance |
    2005 330CiC | Sparkling Graphite | Black | 6MT | ZHP
    2004///M3 | Individual Sterling Gray | Imola Red | 6MT | Eisenmann | Style 163M | SOLD
    2011 X5 35d | Black Sapphire | Nevada Brown Cinnamon | Sports Package |
    Totaled
    2009///M3
    | Interlagos Blue | Pallidum Silver | DINAN | MPerformance | DCT | SOLD
    2002///M3 | Steel Gray Metallic | Imola Red | 6MT | Convertible| SOLD
    2006 X5 4.8iS | LeMans Blue Metallic | Creme Beige | SOLD
    2006 ///M3 | Silver Gray | Black | Competition Package (ZCP) | 6MT | SOLD
    2000 ///M5 | Oxford Green Metallic II | Caramel Nappa Leather | BMW Individual Black Birch Trim | SOLD
    2003 X5 4.6iS | Black Saphhire Metallic | Black Sport | SOLD
    2006 X3 3.0i M-Sport | Silver Gray | Terracotta | SOLD

  8. #8
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    I have this noise also .. I'm starting to think its the tensioners on the motor. Hopefully I will find time to remove the waterpump/alternator belt and see if the noise disappears.
    http://www.bmwmregistry.com/detail.php?id=13792
    * E39 M5 SterlingGray -RIP 11/2018
    * E36 328 vert Schwarz - ~TurboProject underway
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  9. #9
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    Any update yet?

  10. #10
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    Sorry it has taken so long for an update. Indy shop diagnosed the issue as spun rod bearings. Repair work is almost done and should have the M5 back for the weekend. Hopefully the sound issues will be resolved. Tried to include a photo of the bearing but got an app error.

  11. #11
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    Rod bearings? I'm pretty sure that if you spun a bearing, your car would be making way worse noises than the sound in the video you posted.

    Sent from my SCH-I545 using Tapatalk

  12. #12
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    Tried again to upload a photo but get a "Parse Error". Bearing in the photo looks pretty bad. Will update later in the week when I get the car back.

  13. #13
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    Engine harmonic sound (wrup...wrup...wrup...wrup)

    Not familiar with ///m tendencies but it sounds like an exhaust issue to me. I hope you have it figured out but I don't think bearings would make a sound like that directly

    Considering the same type of sound from tuning a guitar I bet its your cats/muffler/resonator or a difference in compression between cylinders


    (It sounds like you know about music but consider) A guitar string has the same effect when it's close to perfect; too tight or loose just a little bit and its making the same woah woah woah woah sound but besides that it's basically a good close to normal sound like any other in tune chord just like the sound your car is making

    This is interesting. Subbed


    Sent from my iPhone using Tapatalk
    Last edited by kawininjazx; 04-30-2016 at 09:23 PM.
    -CJ

    1996 e36 328is 5 speed. Boston green clean and stock.
    1997 540i/6 sport with chrome trim and prefacelift headlights
    Sold

  14. #14
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    Do you guys get a vibration through your steering wheel also?

  15. #15
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    No, no vibration in the steering wheel from this.

  16. #16
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    Quote Originally Posted by bigmitch117 View Post
    Rod bearings? I'm pretty sure that if you spun a bearing, your car would be making way worse noises than the sound in the video you posted.

    Sent from my SCH-I545 using Tapatalk
    I agree with Mitch here, it doesn't sound like rod bearing. There is a good video on youtube of a guy who spun a bearing and the noise was pronounce.



    Quote Originally Posted by iRodD View Post
    Do you guys get a vibration through your steering wheel also?

    Most likely control arm bushings are worn
    2016 328ix | Wagon | M-Sport | Alpine White | Black | iND | 513M | AC Schnizter | MPerformance |
    2005 330CiC | Sparkling Graphite | Black | 6MT | ZHP
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    2009///M3
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    2002///M3 | Steel Gray Metallic | Imola Red | 6MT | Convertible| SOLD
    2006 X5 4.8iS | LeMans Blue Metallic | Creme Beige | SOLD
    2006 ///M3 | Silver Gray | Black | Competition Package (ZCP) | 6MT | SOLD
    2000 ///M5 | Oxford Green Metallic II | Caramel Nappa Leather | BMW Individual Black Birch Trim | SOLD
    2003 X5 4.6iS | Black Saphhire Metallic | Black Sport | SOLD
    2006 X3 3.0i M-Sport | Silver Gray | Terracotta | SOLD

  17. #17
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    Im praying its not a spun bearing, that's an expensive phrase with any motor..
    http://www.bmwmregistry.com/detail.php?id=13792
    * E39 M5 SterlingGray -RIP 11/2018
    * E36 328 vert Schwarz - ~TurboProject underway
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  18. #18
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    Was there any metal in the oil filter? or in the oil pan?
    2016 328ix | Wagon | M-Sport | Alpine White | Black | iND | 513M | AC Schnizter | MPerformance |
    2005 330CiC | Sparkling Graphite | Black | 6MT | ZHP
    2004///M3 | Individual Sterling Gray | Imola Red | 6MT | Eisenmann | Style 163M | SOLD
    2011 X5 35d | Black Sapphire | Nevada Brown Cinnamon | Sports Package |
    Totaled
    2009///M3
    | Interlagos Blue | Pallidum Silver | DINAN | MPerformance | DCT | SOLD
    2002///M3 | Steel Gray Metallic | Imola Red | 6MT | Convertible| SOLD
    2006 X5 4.8iS | LeMans Blue Metallic | Creme Beige | SOLD
    2006 ///M3 | Silver Gray | Black | Competition Package (ZCP) | 6MT | SOLD
    2000 ///M5 | Oxford Green Metallic II | Caramel Nappa Leather | BMW Individual Black Birch Trim | SOLD
    2003 X5 4.6iS | Black Saphhire Metallic | Black Sport | SOLD
    2006 X3 3.0i M-Sport | Silver Gray | Terracotta | SOLD

  19. #19
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    Well folks...got the M5 back. The rod bearing work did not resolve the issue. Very frustrating....

    No steering wheel vibration issues.

  20. #20
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    Quote Originally Posted by MihaNina View Post
    Well folks...got the M5 back. The rod bearing work did not resolve the issue. Very frustrating.... No steering wheel vibration issues.
    and no flakes in oil

  21. #21
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    Engine harmonic sound (wrup...wrup...wrup...wrup)

    Check out your exhaust hangers/mounts for tightness/correct, idk fitment? and I assume compression isn't an issue since you'd be likely experiencing major loss of power but it wouldn't hurt to check that too...

    More directly let me ask, does your car seem to preform/accelerate normally?


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    Last edited by kawininjazx; 05-03-2016 at 10:08 PM.
    -CJ

    1996 e36 328is 5 speed. Boston green clean and stock.
    1997 540i/6 sport with chrome trim and prefacelift headlights
    Sold

  22. #22
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    What other tests have been done at this point? Have you done compression test? Exhaust leaks?

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  23. #23
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    Quote Originally Posted by bigmitch117 View Post
    What other tests have been done at this point? Have you done compression test? Exhaust leaks?

    Sent from my SCH-I545 using Tapatalk
    Yea that's what I'm thinking
    -CJ

    1996 e36 328is 5 speed. Boston green clean and stock.
    1997 540i/6 sport with chrome trim and prefacelift headlights
    Sold

  24. #24
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    Quote Originally Posted by MihaNina View Post
    Well folks...got the M5 back. The rod bearing work did not resolve the issue. Very frustrating....

    No steering wheel vibration issues.
    I would be furious with the shop that diagnosed this car....Spending thousands on rod bearing replacement and that's not the issue.

    - - - Updated - - -

    I had my friend listen to the video, and I trust him 100% with my car. He suggested: remove the accessory belts and repeat to see if it's bearing related (Alt, water pump, etc.). Also, out of balance or failed dual mass flywheel can cause noise and vibration.
    2016 328ix | Wagon | M-Sport | Alpine White | Black | iND | 513M | AC Schnizter | MPerformance |
    2005 330CiC | Sparkling Graphite | Black | 6MT | ZHP
    2004///M3 | Individual Sterling Gray | Imola Red | 6MT | Eisenmann | Style 163M | SOLD
    2011 X5 35d | Black Sapphire | Nevada Brown Cinnamon | Sports Package |
    Totaled
    2009///M3
    | Interlagos Blue | Pallidum Silver | DINAN | MPerformance | DCT | SOLD
    2002///M3 | Steel Gray Metallic | Imola Red | 6MT | Convertible| SOLD
    2006 X5 4.8iS | LeMans Blue Metallic | Creme Beige | SOLD
    2006 ///M3 | Silver Gray | Black | Competition Package (ZCP) | 6MT | SOLD
    2000 ///M5 | Oxford Green Metallic II | Caramel Nappa Leather | BMW Individual Black Birch Trim | SOLD
    2003 X5 4.6iS | Black Saphhire Metallic | Black Sport | SOLD
    2006 X3 3.0i M-Sport | Silver Gray | Terracotta | SOLD

  25. #25
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    Thanks for all the feedback. Plan to visit with the Indy shop after bearing brake in period. Should have 500 miles on it by Monday. Not giving up...Will update as I get new info.

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