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Simple question I need the answer to.

Discussion in '348/355' started by johnk..., Apr 12, 2020.

  1. johnk...

    johnk... F1 Veteran
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    #1 johnk..., Apr 12, 2020
    Surprised I don't know this. I do know the 355 liners are coated with Nikasil. But what is the base metal?
     

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  2. johnk...

    johnk... F1 Veteran
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    #2 johnk..., Apr 12, 2020
    never mind, got it.
     
  3. flash32

    flash32 Formula 3

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    #3 flash32, Apr 12, 2020
    Please tell for future searches ..tia

    Sent from my moto g(7) using Tapatalk
     
  4. johnk...

    johnk... F1 Veteran
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    #4 johnk..., Apr 12, 2020
    My source has to check to be sure. I'll let you know.
     
  5. johnk...

    johnk... F1 Veteran
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    #5 johnk..., Apr 12, 2020
    He confirmed they are steel. I was questioning it because my 308 QV manual say the QV liners are Niasil coated aluminum. So now I'm wondering if the QV liners are actually AL or it that is an error int he manual.
     

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  6. Ferrarium

    Ferrarium F1 Rookie
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    #6 Ferrarium, Apr 12, 2020
  7. johnk...

    johnk... F1 Veteran
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    #7 johnk..., Apr 12, 2020
    From the 308/328 QV workshop manual.

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    Confusing isn't it. Early 308, steel. QVs, aluminum? 355, steel. But if the QVs are aluminum I guess nitrite antifreeze is out. I would think that with an aluminum block nitrite antifreese (G-05) shouldn't be used in a 355 either, regardless of the wet liners.
     
  8. bjwhite

    bjwhite F1 Rookie

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    #8 bjwhite, Apr 12, 2020
    And what about the 348? Curious.

    I'd always heard nightmares of BMW and Nikasil and they replaced whole engines for Alusil.

    What the BMW process defective or has Nikasil been a problem in other engines too?
     
  9. m.stojanovic

    m.stojanovic Formula 3
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    #9 m.stojanovic, Apr 12, 2020
    No defective process on BMW-s, Jaguar V8 Nikasil engines (97-99) also suffered badly. Many Jag engines were replaced under warranty and in the year 2000 Jaguar went back to steel liners. The problem was caused by high sulphur content in petrol in the 90-s (sulphur "ate" Nikasil). Any Nikasil engine that has survived the sulphur period is now fine as the sulphur content is minimal in today's petrol (reduced since early 2000-s actually).
     

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