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White mist in my engine bay

Discussion in '360/430' started by drcripp, Nov 11, 2017.

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  1. drcripp

    drcripp Karting

    Nov 1, 2016
    123
    Pittsburgh
    Full Name:
    David Crippen
    #1 drcripp, Nov 11, 2017
    A very strange thing yesterday for my 2001 360 Modena. Pulled out of my driveway, nice clear day, temp in the early 40s F. Heard a "fizzing" sound from the back, looked in the rear view mirror to see the engine compartment filling up with fairly thick white mist (not smoke). Engine sounded OK. Turned around quick, pulled back into driveway, whipped open the back clear bonnet and by the time I did that, it was all gone. Wasn't smoke. Engine light never came on. So I started engine and watched it for a while, completely clear, pristine engine bay. Drove a few miles, normal operating temp, oil pressure. No engine light. Car ran completely normally.

    ???
     
  2. Ghostdiver

    Ghostdiver Formula 3

    Mar 18, 2005
    1,348
    Southeast Texas
    Full Name:
    Wally Hollar
    #2 Ghostdiver, Nov 11, 2017
    How about your ac....does it still work? Almost sounds like Freon discharge....
     
  3. irix

    irix Karting

    Aug 28, 2015
    51
    Germany
    Full Name:
    J.B
    #3 irix, Nov 11, 2017
    F1Spider likes this.
  4. mike01606

    mike01606 Formula Junior

    Feb 21, 2012
    794
    Cheshire UK
    Full Name:
    Mike M
    #4 mike01606, Nov 11, 2017
    F1 or manual?
    If F1 could be an F1 fluid leak or overfill vent onto a hot exhaust.


    Sent from my iPhone using Tapatalk
     
  5. SoftwareDrone

    SoftwareDrone F1 Veteran
    Sponsor Owner

    Jan 19, 2004
    7,857
    San Jose, California
    Full Name:
    Mike
    #5 SoftwareDrone, Nov 11, 2017
    If you find fine, white powder all over the rain gutters, etc. after the fact, it's the muffler. Otherwise, what others have posted.
     
  6. Mickster

    Mickster Formula Junior

    Oct 24, 2015
    608
    Sweden
    Full Name:
    Mikael Andersson
    #6 Mickster, Nov 12, 2017
    Yup - this is what I would suspect as well. Of course; That’s only if you still have the original muffler in place.
     
  7. drcripp

    drcripp Karting

    Nov 1, 2016
    123
    Pittsburgh
    Full Name:
    David Crippen
    #7 drcripp, Nov 13, 2017
    Muffler is a new Tubi and there is absolutely no residual of anything after this episode. Engine bay is totally pristine. The mist occurred after a "pfffft" sound and lasted only a few seconds. Nothing at all occurred in the engine. Muffler is pristine. It's almost certainly a blown air conditioner connector or something similar. Will have it checked in the Spring. Thanks for advice and things to look for,.
     
    Ghostdiver likes this.
  8. F1Spider

    F1Spider Karting

    Jan 8, 2013
    199
    Austin
    Full Name:
    Stuart
    #8 F1Spider, Nov 13, 2017
    This is 99% the cause. When my OEM muffler started going it spat out white "snow" like stuff that was all inside my engine bay. Materiel inside the muffler will degrade, break down and will come out and float everywhere. Good news is it is time to upgrade to an aftermarket muffler!
     
  9. mike01606

    mike01606 Formula Junior

    Feb 21, 2012
    794
    Cheshire UK
    Full Name:
    Mike M
    #9 mike01606, Nov 13, 2017
    See post #7.....

    The OEM exhausts blow out dust but not enough to fill the engine bay with white mist.


    Sent from my iPhone using Tapatalk
     
  10. cgfen

    cgfen Formula Junior

    Jun 1, 2015
    447
    vista ca
    #10 cgfen, Nov 14, 2017
    Did you notice an odor?

    that might help isolate the issue?
     
  11. Skippr1999

    Skippr1999 F1 Rookie
    Silver Subscribed

    Dec 22, 2009
    4,499
    #11 Skippr1999, Nov 14, 2017
    I blew a AC hose on my Alfa once and had white mist coming out of the hood for about 20 seconds. It looked like the steam from a radiator overheating. There was a nasty oily residue afterwards around the leak and all parts close by.
     

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