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Thread: Hissing noise in drivers footwell

  1. #1
    Join Date
    Dec 2013
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    London England
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    1982 635csi

    Hissing noise in drivers footwell

    Hi. I’ve just noticed a hissing sound coming from to the right side underneath the steering column. I checked it and it’s a small air hose which is releasing air in the footwell It seems to be going into the back of the cluster. I can’t found anywhere what this is. Any help would be great. Cheers Antonyo

  2. #2
    Join Date
    Sep 2009
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    Denver, Colorado
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    2,876
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    1985 535i, 1980 635CSi
    Quote Originally Posted by Theantony View Post
    Hi. I’ve just noticed a hissing sound coming from to the right side underneath the steering column. I checked it and it’s a small air hose which is releasing air in the footwell It seems to be going into the back of the cluster. I can’t found anywhere what this is. Any help would be great. Cheers Antonyo
    For interior temperature sensor. It is correct as is, but may be missing a small plastic orifice that quiets the noise.
    Last edited by tschultz; 07-05-2018 at 08:53 AM.

  3. #3
    Join Date
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    London England
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    1982 635csi
    Great cheers. So basically there couldn’t be a fault at the manifold end only the foot we’ll end.

    thanks

    antony.

  4. #4
    Join Date
    Feb 2009
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    Pittsburgh, PA
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    '86 635CSi, '08 128i
    Yep, it's the interior ambient temp sensor. It's oddly a part of the climate control system, has two little internal senders. You might have some A/C troubles if the sensor is absent or not working. Mine was broken when I got my 635CSi. I couldn't find a really decent pic, but there's this thread at BigCoupe for your viewing pleasure.

  5. #5
    Join Date
    Jul 2007
    Location
    Barrington, RI
    Posts
    2,035
    My Cars
    E24 M6, E39, F70
    Does anyone have one of these they would sell me? I think mine is bad as I'm hearing air at idle from it, which of course was never the case previously.

  6. #6
    Join Date
    Feb 2009
    Location
    Pittsburgh, PA
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    1,718
    My Cars
    '86 635CSi, '08 128i
    I have one from a parts car, it was flooded...feel like taking a chance on it?

    It's yours for shipping, like $5? Lowball me an offer and I'll send it along:
    https://www.ebay.com/itm/202945277548
    Save the manuals!
    '08 128i 6MT, '86 635CSi 5MT (B32, Motronic 1.3, WBO2, G265, 18# FW, 3.46 torsen)
    Past projects:
    '96 318iS, sold 4/23 '90 535iM, RIP 1/23 '90 535iA RIP 6/22 '91 318i, sold 7/19 '97 M3 sedan, sold 11/18 '85 735i, RIP 2/18 '92 325iC, sold 7/16 '91 318iS, sold 6/16 '84 745i, sold 10/14 '82 633CSi, traded 9/12 '90 325i, RIP '87 325 sold '89 525i, traded '87 325iS, RIP

  7. #7
    Join Date
    Jun 2018
    Location
    MT View, HI
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    98 318ti, 80 733, 76 '02
    Quote Originally Posted by DesktopDave View Post
    ...It's yours for shipping, like $5? Lowball me an offer and I'll send it along
    Take him up on this Jeff!
    Dave, you are the man. Thanks for all you, do for all of us.

  8. #8
    Join Date
    Jul 2007
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    Barrington, RI
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    2,035
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    E24 M6, E39, F70
    Being the Idiot that some owners here in the Northeast tend to be, I didn't see this till now and already bought one on Ebay at ten times the price of your generous offer - but thank you, it should be here by end of the week along with an inline restrictor.

  9. #9
    Join Date
    Aug 2010
    Location
    West Nyack, New York
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    86 635csi 98 740i 96 MB
    I'm with you Jeff, us idiots have to stick together.

  10. #10
    Join Date
    Nov 2005
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    Brookfield,CT
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    1,964
    My Cars
    '92 325IC '88 635
    Hey...I resemble that remark!
    '88 635, '92 325IC

  11. #11
    Join Date
    Mar 2019
    Location
    Burlington, Massachusetts
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    117
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    1985 635csi
    I was driving from Bristol, Ri to Fall River MA the other day and to my surprise looked over a saw a familiar low budget motel.

    Sent from my SAMSUNG-SM-G930A using Tapatalk

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