best high temperature exhaust bypass valve sealer? | FerrariChat
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best high temperature exhaust bypass valve sealer?

Discussion in '348/355' started by hjp, Oct 20, 2015.

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  1. hjp

    hjp Formula Junior

    Feb 23, 2013
    591
    Kansas City, Mo.
    Full Name:
    Jerry Peterson
    #1 hjp, Oct 20, 2015
    I am replacing the two SS O rings on each side of my 355's bypass valve. A Ferrari tech suggested a thin film of sealer be applied around the rings to help ensure they don't leak. I'm guessing some sort of high temperature silicone would be appropriate. What have you guys used? What temperature limit do you think this stuff needs to be?
     
  2. Eric C

    Eric C F1 World Champ
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    Mar 20, 2009
    11,136
    St. Louis, MO
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    Eric
    #2 Eric C, Oct 20, 2015
    I've never added any sealant around those rings.
     
  3. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
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    Brian Crall
    #3 Rifledriver, Oct 20, 2015
    A Ferrari mechanic suggested that?

    I really don't think so but if true you now know one to not take your car to.
     
  4. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
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    Brian Crall
    #4 Rifledriver, Oct 20, 2015
    No one with half a brain has.
     
  5. hjp

    hjp Formula Junior

    Feb 23, 2013
    591
    Kansas City, Mo.
    Full Name:
    Jerry Peterson
    #5 hjp, Oct 21, 2015
    Why? What is wrong with a small amount of a high quality sealer. I'm not arguing, just asking to understand the downside.
     
  6. phrogs

    phrogs F1 Veteran
    Silver Subscribed

    Apr 13, 2004
    7,357
    Kzoo Michigan
    #6 phrogs, Oct 21, 2015
    Becuase you shouldn't need to use a band aid to make it seal.


    It should seal without sealant if it doesn't you have other problems, Douching it with some silicone won't fix it.

    I mean what does he use to weld parts with?? JB weld?
     
  7. lotusk

    lotusk Formula 3

    Nov 3, 2003
    1,840
    London UK
    #7 lotusk, Oct 21, 2015

    He is no "tech"

    Do it right.

    The parts fit if fitted right.

    No bodge job
     
  8. gothspeed

    gothspeed F1 World Champ

    May 26, 2006
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    goth
    #8 gothspeed, Oct 21, 2015
    If exhaust components are not sealing or seating flush on their interfaces, then they need to be loosened and realigned. If they still do not seal up, then the suspect part(s) need to be corrected on a bench.
    Many exhaust parts including factory are not very straight or square. Maybe they were ok when new .... but after many heat cycles and deformation prone tubing .... this leak does not surprise ... :eek:
     

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