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458 Front & Rear Shocks Leak

Discussion in '458 Italia/488/F8' started by American, Dec 26, 2020.

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  1. American

    American Rookie

    Mar 31, 2016
    21
    Hey FChat :)

    Writing here from California. Currently own a 458 and have a leaking shock on the driver-left.
    Couple of questions.

    1. I'm noticing 3 part numbers.
    - 255863 (front)
    - 255864 (rear)
    - 310450 (front shock but with lift)

    Does that sound accurate, or are all of them truly the same?

    2, These look to be Ohlin or Delphis. Is there an option to go direct for the replacement?

    3. I've also seen some speaking about rebuilding shocks. Seems like the way to go especially since there is less waste. Anyone have experience or recommendations for this?

    Thanks a lot, guys.
     
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  3. Need4Spd

    Need4Spd F1 Veteran
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    Feb 24, 2007
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    r6elmo and daflk like this.
  4. Ianjoub

    Ianjoub Formula Junior

    Dec 22, 2019
    799
    Homosassa, FL USA
    Full Name:
    Ian Joubert
    A metal rod with a couple of collars welded on each end will replace the shocks to allow your car to be rolled around in the mean time.
     
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  5. Need4Spd

    Need4Spd F1 Veteran
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    Feb 24, 2007
    6,251
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    Great idea!


    Sent from my iPad using FerrariChat
     
  6. RayJohns

    RayJohns F1 Veteran
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    May 21, 2006
    6,823
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    Ray Johns
    I've rebuilt Ohlins shocks (motorcycle racing forks) in the past. It's somewhat of a technical job. You typically need the seals and some fairly specialized tools to do it right. In some cases, oil vs air levels can be involved. I'm not sure if Ferrari uses magnetic damper type fluid as well, but if so I would guess that makes the job even more involved.

    Also, compressing the springs on the 458 coilovers is no joke either.

    Ray
     
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  8. RayJohns

    RayJohns F1 Veteran
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    May 21, 2006
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    Ray Johns
    Here are a couple of videos from my YouTube channel that you might find interesting:



    That is an old one showing the process I used to rebuild the Ohlins forks. You'll wanna skip through a lot if it...



    That one shows a bit from when I was lowering the front of my 458 down 15mm. You can get an idea of what's involved. Be real careful with those aluminum collars if you don't know what you're doing :) Search Ferrarichat for several threads on adjusting the collars where things have gone horribly wrong for people.

    Ray
     
  9. colorfull

    colorfull Formula Junior
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    Sep 12, 2020
    399
    Franklin Park, New Jersey
    Full Name:
    John Napoli
    Thanks all, anyone know of any places in the US that rebuild shocks?

    F430's are in need

    Thanks again
     
  10. Need4Spd

    Need4Spd F1 Veteran
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    Feb 24, 2007
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    The 458 shocks have magnetic fluid.


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  11. Melvok

    Melvok F1 World Champ
    Silver Subscribed Owner

    Jul 25, 2008
    13,479
    Amersfoort, Holland.
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    Mel
    Whaauw ... can you explain that to us please ?
     
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  13. Need4Spd

    Need4Spd F1 Veteran
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    #10 Need4Spd, Dec 31, 2020
    Last edited: Dec 31, 2020
    458s have magnetorheological shocks, licensed from Delphi. The fluid inside reacts to magnetic fields, allowing the damping to be varied. Read about them here:
    https://en.wikipedia.org/wiki/Magnetorheological_damper
    I also seem to recall being told that the OEM fluid tends to be abrasive and hard on seals, which is why they develop leaks. I don’t know if the fluid was improved in later cars. Check out the link at Madeno Racing above.


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  14. VelocityTexas

    VelocityTexas Karting
    Rossa Subscribed Owner

    Oct 21, 2019
    158
    North Texas
    Full Name:
    Bryan
    Is the shock leaking with results on the floor or sweating? Sweating is something you should be able to live with as it’s not uncommon.
     
  15. Need4Spd

    Need4Spd F1 Veteran
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    Feb 24, 2007
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    In my case just sweating, I think. If so, I’m not in a great hurry to have them rebuilt. Image Unavailable, Please Login


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  16. Melvok

    Melvok F1 World Champ
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    Jul 25, 2008
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    Mel
    Thanx for the phot, so we can now inspect our own system. Which year, kilometers ?
     
  17. Need4Spd

    Need4Spd F1 Veteran
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    Feb 24, 2007
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    2010, about 28,000 km (17.5K miles).
     
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