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Thread: Whistle on shutdown?

  1. #1
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    Whistle on shutdown?

    Hi Guys, it's been a long long time since I asked for help and you all have always hit it on the head. I'm a little stumped on this noise. I found someone on the internet that captured probably a better 10 second audio clip than I could. It's on a 02' 530i sport, m54/ZF automatic with 75k. I just put a new CCV in thinking It was the culprit but apparently it was not. Plugged into DIS and INPA, Nothing is in the DME active or shadow memory.

    https://youtu.be/pP2d93qHTgw

    Thanks in Advance
    Last edited by ilandbetter; 10-03-2017 at 05:54 PM.

  2. #2
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    Is this on a cold engine?

    Sounds like an electric motor revving down. Could it be the HVAC blower? Turn the system off and try again.


    Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.

  3. #3
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    1998 528i
    Electric auxiliary water pump perhaps?
    1998 BMW 528i My First Build

  4. #4
    JimLev's Avatar
    JimLev is offline Artifically Aspirated Moderator
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    Does it do it when the engine is hot?
    If not then I'd gues it's the secondary air pump.

  5. #5
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    It can be cold or hot. HVAC on or off. It almost sounds like escaping air when doing a compression test. The secondary air pump seems feasible. I have never had a problem with it on my previous two but I will dig further on that road. Thanks for the ideas.
    Last edited by ilandbetter; 10-04-2017 at 11:38 AM.

  6. #6
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    The pump only runs for a short time after a cold start.


    Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.

  7. #7
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    Thanks Ed. I checked that whole system for vacuum leaks anyway. Ran the pump and cycled the solenoid with the GT1 its definitely not the noise maker. Again thanks for the heads up this was a part of the M54 that I never looked twice at so I learned something.

    The woosh of air can be heard clearly at the air box after shut down. Not sure yet where this poof of air originates. I am sure its not a problem, just never had it on my other 530's. Possibly associated I can hear a light whistle (like a vacuum leak) barely off the idle step that immediately goes away, no rpm will keep it as a constant. I have been through every rubber hose and boot on this thing and all connections look good. I replaced one because it was starting to look old and get a little flaky on the outside.

    I appreciate the help so far. Eric

  8. #8
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    All three of my 530is run/ran (until totalled) perfectly; all of them make this sound. No idea what it is, but I wouldn't be worried about it.
    Nate J.

    (oOO\ (|||)º(|||) /OOo)
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  9. #9
    geargrinder's Avatar
    geargrinder is offline Having No Trouble Here BMW CCA Member
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    Quote Originally Posted by computiNATEor View Post
    All three of my 530is run/ran (until totalled) perfectly; all of them make this sound. No idea what it is, but I wouldn't be worried about it.
    Yknow I think I had this sound for a little while. Never had it... then did... then didn't. If its same sound then would imply some 'system' that's roughly same whether V8 or I6...

    Maybe evap system? I did tinker w/ my evap connections and solenoid connection etc. and made my evap code go away, wondering if some vacuum was getting drawn into the tank system then leaking back down on shutdown? Just brainstorming...
    2003 M3CicM6 TiAg
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  10. #10
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    01 M5 TiAg/M1SW
    I suspect it's a vacuum reservoir somewhere discharging, like the brake booster or something. It seems to me like a sucking sound.
    Nate J.

    (oOO\ (|||)º(|||) /OOo)
    Titanium Silver/Black Nappa Full 07-18-2001 E39 M5 Heritage (BZ99672). 198,000mi+. Increasing daily. Engine rebuild thread.
    (eŌō\ (||||)º(||||) / ōŌe)
    Alpineweiss III/Black Merino Full 03-26-2007 E60 M5 Manual (CX08265). 157,000+. Dead starter -_-

    RIP, Seabiscuit. Black Sapphire/Schwarz 03-11-2003 530iA Sport (CK39185). T-boned 03-01-2017 at 155,861mi.
    Take 2 "Otto" - Toledo Blue/Sandbeige 04-25-2002 530iA Sport (CH98032). Sold 11-10-2017 at 147,743mi.
    Take 3 "Manuel" - Toledo Blue/Grau 10-29-2001 530i5 Sport (CE92358). Sold 02-01-2019 at 217,600mi. I regret that. Build Log
    Reliable P.O.S. - Green/gray 1995 Camry V6 LE. 270k mi. Sold for space.

  11. #11
    geargrinder's Avatar
    geargrinder is offline Having No Trouble Here BMW CCA Member
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    Sucking sound? Maybe it's coming from my wallet.
    2003 M3CicM6 TiAg
    2002 540iT Sport Vortech S/C 6MT LSD TiAg
    2008 Audi A3 2.0T DSG (the daily beater)
    2014 BMW X1 xDrive28i (wifemobile)

    Former:

    1985 MB Euro graymarket 300SL
    1995.5 Audi S6 Avant (utility/winter billetturbobattlewagen)


  12. #12
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    97 Z3 1900.
    I have a whistle at idle which goes away on the slightest touch of the throttle. Changed the injector "O" Rings and air hoses, cleaned throttle body. It seems to be coming from the induction manifold but damned if I can find it. Any ideas?
    Rob

  13. #13
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    Replace the intake gaskets and report back.

    The intake manifold is plastic. When the silencer cover is removed, the intake noise is apparent.


    Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.

  14. #14
    geargrinder's Avatar
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    Quote Originally Posted by fingoonrob View Post
    97 Z3 1900.
    I have a whistle at idle which goes away on the slightest touch of the throttle. Changed the injector "O" Rings and air hoses, cleaned throttle body. It seems to be coming from the induction manifold but damned if I can find it. Any ideas?
    Rob
    Uhhh.. Also maybe try posting in the Z3 forum.

    Hell man, the car isn't remotely similar, and maybe if it was an M54 engine like OP here I'd give ya something for the cross-over, but you're an M44 4-cyl engine.... not only a generation + back, but not even the same number of cyls!
    2003 M3CicM6 TiAg
    2002 540iT Sport Vortech S/C 6MT LSD TiAg
    2008 Audi A3 2.0T DSG (the daily beater)
    2014 BMW X1 xDrive28i (wifemobile)

    Former:

    1985 MB Euro graymarket 300SL
    1995.5 Audi S6 Avant (utility/winter billetturbobattlewagen)


  15. #15
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    If you are talking about that last sound, like air escaping, it is normal for M54 engines. It does sound louder than usual but that might be because the hood is open and the mic is near the engine.

    I was also concerned about this noise until I read this: https://www.bimmerforums.com/forum/s...off-M54-engine

    Now that I have a M52tu, I miss the M54's "sigh of relief" when I cut the engine. LOL!
    [IMG][/IMG]

  16. #16
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    Quote Originally Posted by JaxPlanet View Post
    If you are talking about that last sound, like air escaping, it is normal for M54 engines. It does sound louder than usual but that might be because the hood is open and the mic is near the engine.

    I was also concerned about this noise until I read this: https://www.bimmerforums.com/forum/s...off-M54-engine

    Now that I have a M52tu, I miss the M54's "sigh of relief" when I cut the engine. LOL!
    My M54 also makes that sound. I would like to know what it is.

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