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Ferrari 400i exhaust header removal

Discussion in '365 GT4 2+2/400/412' started by christc, Nov 27, 2016.

  1. christc

    christc Formula Junior

    Mar 3, 2013
    331
    Germany
    #1 christc, Nov 27, 2016
    Last edited by a moderator: Sep 7, 2017
    Dear All,

    what is the exact procedure for removal of the exhaust headers on a fuel injected 400i?

    I would like to have the headers ceramic coated and need to remove them therefor.

    Do I need to remove the complete injection system on each side of the engine or is there enough space if I just remove the air filter box but leave the rest in?

    I would be very greatfull if someone could offer advice on the different steps for the removal. Thanks a lot.

    Christopher
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  3. jacques

    jacques Formula Junior
    Silver Subscribed

    May 23, 2006
    838
    Los Angeles/Florida
    No, you do not need t remove the injection system be cause you are going to remove the exhaust manifold from beneath the car. Remove the exhaust pipes bolts at the collector, and tie the pipes up in situ. then you can start to remove and loosen the header bolts. Just loosen them until you have them all loose on each given section(3 per side). These are heavy pieces, and you don't want the falling and breaking your nose and teeth. Straight forward. really,. Just remember to install the in reverse order. Also a little WD40 wouldn't hurt as you do not want to snap one of the bolts off. New gaskets wouldn't hurt at this time. I hope that this is of some use to someone. Thank you. Jq.
     
  4. christc

    christc Formula Junior

    Mar 3, 2013
    331
    Germany
    Hello Jacques,

    thanks for the fast reply. I guess rhe heat shield stays in that way. I will face it within the next weeks and for sure will use some WD40 upfront.

    Thanks
    Christopher
     
  5. bjwhite

    bjwhite F1 Rookie

    Mar 17, 2006
    4,084
    Seattle, WA
    Full Name:
    Brian White
    The heat shields can come off without removing the injection systems. They are bolted to the headers themselves.
     
  6. GT Jones

    GT Jones Formula Junior

    Oct 15, 2011
    667
    Lincoln, MA
    Full Name:
    Christian J
    Definitely new gaskets and nuts. The nuts aren't in tight. I coated my headers a few years ago.
     
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  8. christc

    christc Formula Junior

    Mar 3, 2013
    331
    Germany
    Done it today. Really was easy as you said with air filter boxes removed I could
    get at some bolts from above, some from below. Thanks a lot for your recommendations!

    Christopher
     
  9. Schumi

    Schumi Formula Junior
    Silver Subscribed Owner

    Jun 5, 2002
    742
    Missouri
    Full Name:
    Daren
    What color coating would appear "correct" for our cars? Who is the best to do this work?
     
  10. christc

    christc Formula Junior

    Mar 3, 2013
    331
    Germany
    I am thinking of having it plasma ceramic coated in black. Adresses I do only have in Germany. Sorry.
    Christopher
     
  11. Newman

    Newman F1 World Champ
    Professional Ferrari Technician Consultant Owner

    Dec 26, 2001
    13,693
    Canada
    Full Name:
    Newman
    Mine on my 400i are a metallic white and original just like a set of 365 boxer headers I have kicking around in my basement. I think black is incorrect.
     
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  13. jacques

    jacques Formula Junior
    Silver Subscribed

    May 23, 2006
    838
    Los Angeles/Florida
    Who sells the best quality header gasket? Also, what size are the header nuts and bolts, and what is the size of the bolt that fastens the the heat shield to the headers. Thank you all very much. Jq.
     
  14. GT Jones

    GT Jones Formula Junior

    Oct 15, 2011
    667
    Lincoln, MA
    Full Name:
    Christian J
    #11 GT Jones, Dec 6, 2016
    Last edited by a moderator: Sep 7, 2017
    I found when re-assembling mine that there were flat copper gaskets and 'puffy' copper gaskets that look to have better sealing. Awitalian.com had them in stock. Check dimensions when you remove them
    400 engines use these
    exhaust gasket 147630 (4)
    exhaust gasket 147631 (4)

    Not sure about the bolts & nuts. I did apply a high-temp heat shield to the inside of the heat shields and combined with the ceramic coat headers it has noticeably reduced interior footwell temps.
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  15. Anthony bentley

    Anthony bentley Formula Junior

    May 20, 2006
    471
    London
    Full Name:
    Anthony Bentley
     
  16. Anthony bentley

    Anthony bentley Formula Junior

    May 20, 2006
    471
    London
    Full Name:
    Anthony Bentley
    Do I even need to remove the air boxes to get the headers off?
     
  17. christc

    christc Formula Junior

    Mar 3, 2013
    331
    Germany
    Only the lower part housing the filter.
     
  18. Anthony bentley

    Anthony bentley Formula Junior

    May 20, 2006
    471
    London
    Full Name:
    Anthony Bentley
    With out looking yet, does it come out of the bottom or top?
     
  19. christc

    christc Formula Junior

    Mar 3, 2013
    331
    Germany
    Top, but it is a quiet tight fit
     
  20. Anthony bentley

    Anthony bentley Formula Junior

    May 20, 2006
    471
    London
    Full Name:
    Anthony Bentley
    How tight do you go with the new nuts?
     

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