360 - Anyone ever had their Tubi headers crack at the cylinder head? | Page 2 | FerrariChat
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360 Anyone ever had their Tubi headers crack at the cylinder head?

Discussion in '360/430' started by Jaymac, Oct 25, 2025 at 12:31 PM.

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  1. Jaymac

    Jaymac Formula 3
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    Jeremy McCurdy
    #26 Jaymac, Oct 26, 2025 at 3:40 PM
    The machine shop said they would put it in their oven to “bake it” before decking it (after the weld repairs), but I will be sure to ask the welder if they’re planning on doing that as part of their repair.
     
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  2. Extreme1

    Extreme1 Formula 3

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    #27 Extreme1, Oct 26, 2025 at 3:44 PM
    Replace the gasket. Do this right or you will be doing it again.
     
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  3. flash32

    flash32 F1 Veteran

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    #28 flash32, Oct 26, 2025 at 3:48 PM
    Tell them this is unacceptable for the price and you would.like.a replacement
     
  4. Extreme1

    Extreme1 Formula 3

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    #29 Extreme1, Oct 26, 2025 at 4:00 PM
    Ok this is the same annealing process, just done in a different way.
     
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  5. andrejwolk1975

    andrejwolk1975 Karting

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    #30 andrejwolk1975, Oct 26, 2025 at 4:02 PM
    This is a perimetral failure not only a crack. Maybe this point was a ittle bit "recessed" than other 3 and thermal stress on a constant "stretch" caused this.
     
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  6. Jaymac

    Jaymac Formula 3
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    #31 Jaymac, Oct 26, 2025 at 4:59 PM
    You’re right. Gaskets and OEM nuts in my cart on @Ricambi America . I’m going to call tomorrow and see if they’ll separate the set of OEM gaskets. The site will only allow a minimum of 8 gaskets.

    I can try, but I’m also not the original purchaser. I have the last owners installation receipt from the shop, but not the receipt for the parts themselves.
    Sounds like you have some welding knowledge. Do you think there could be any issues with rewelding this?

    The welder I found does this all the time on Harley’s due to vibration and flexing.
     
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  7. andrejwolk1975

    andrejwolk1975 Karting

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    #32 andrejwolk1975, Oct 27, 2025 at 2:11 AM
    I think this work is doable but
    my suggestion is to remove the header:
    1) for a deep inspection on then inner side of the "crack" (debris incoming....who knows?);
    2) to verify the planarity of the installing surface of the header, maybe it was warped from the very beginning;
    3) to freely work on the header without concern and in the best possible way.
    If the header is ok on the inside, with no tendency to create debris, if you can (easily) recover the planarity of the piece I think that a professional welder could do the job easily.
    But as I said, first try to contact the producer: owners change the original headers for not having this kind of problems.....and you have had this.kind of problems!
    The F430 is a bit more "harsh" on the headers due the design, the 360 is more on the gently side with them.
     
  8. 2ndGen

    2ndGen Rookie

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    #33 2ndGen, Oct 27, 2025 at 7:33 PM
  9. flash32

    flash32 F1 Veteran

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    #34 flash32, Oct 27, 2025 at 7:54 PM
    These may work

    Bmw 18107523805
     
  10. tbakowsky

    tbakowsky Two Time F1 World Champ
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    #35 tbakowsky, Oct 27, 2025 at 10:08 PM
    Are your manifolds serial numbered near the collector flange? If so..email Tubi with pictures of the failure. I would send it back to them. They may repair, or send you a new replacement. I had an issue with a 355 Tubi manifold and there was zero issue with warranty. I had a new manifold within 3 days. Shipping paid.
     
  11. Jaymac

    Jaymac Formula 3
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    #36 Jaymac, Oct 27, 2025 at 10:10 PM
    Thanks to all for your suggestions. I ended up going with OEM nuts and gaskets from @Ricambi America. I questioned whether going with a smaller head size and different locking design could compromise strength or longevity. I didn’t find the 13mm’s that difficult to work with. Much easier than most people’s accounts led me to expect. Perhaps it’s because I was removing aftermarket headers vs OEM, or perhaps it was the right combination of wrenches, skinny hands and wrists, telescoping illuminated mirrors, flashlights, and sheets of Kaizen foam and tempurpedic pillows to lay on top of the engine while working from above… but it wasn’t that bad! :D
     
  12. Jaymac

    Jaymac Formula 3
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    #37 Jaymac, Oct 27, 2025 at 10:13 PM
    That’s good to hear! They are stamped and numbered. I reached out to them via IG, and they responded and told me to send my account of the failure and pictures to their main email address. I did so earlier this evening. I’ll be interested to see what they say.
    Thanks!
     
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