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Foreign substance adhering to the manifold

Discussion in '308/328' started by Sansho Kamogawa, Oct 16, 2025 at 7:42 AM.

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  1. Sansho Kamogawa

    Sansho Kamogawa Rookie

    Oct 12, 2025
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    Hideyuki Kishimoto
    #1 Sansho Kamogawa, Oct 16, 2025 at 7:42 AM
    The photo shows the intake manifold inlet of a 308 (carbureted version). There seems to be some reddish, crystal-like substance attached. Do you know what this might be?
    View attachment 3080187
     
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
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    Steve Magnusson
    #2 Steve Magnusson, Oct 16, 2025 at 11:05 AM
    Wrong photo?
     
  3. GT4andMore

    GT4andMore Karting

    Oct 23, 2020
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    Graham
    #3 GT4andMore, Oct 16, 2025 at 12:27 PM
    Have you seen my recent post "Unusual deposits on my inlet manifold". Sounds similar. I have stripped, cleaned, resurfaced, smooth, and renistalled my manifolds and so far so good. Just fighting the oil leaks on my cam shaft seals with my newly delivered bucket of Loctite 518 and I should be sorted.
     
  4. ChevyDave

    ChevyDave Formula Junior

    Dec 21, 2019
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    Dave W
    #4 ChevyDave, Oct 17, 2025 at 2:08 AM
    I'm not 100% sure, but it looks as though your intake manifold may be contaminated with a 1963 Ferrari 250 LM. :D
    - Dave
     
    bitsobrits and Zenobie like this.
  5. Sansho Kamogawa

    Sansho Kamogawa Rookie

    Oct 12, 2025
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    Hideyuki Kishimoto
    #5 Sansho Kamogawa, Oct 18, 2025 at 10:55 PM
    contaminated with 250 LM…？？？
     
  6. Sansho Kamogawa

    Sansho Kamogawa Rookie

    Oct 12, 2025
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    Hideyuki Kishimoto
    #6 Sansho Kamogawa, Oct 18, 2025 at 11:18 PM
    Graham

    Thank you for your answer.
    However, the deposits are at the intake manifold entrance, away from the coolant path, and even if they were coolant, how would they get against the airflow to the carburetor?
     
  7. ChevyDave

    ChevyDave Formula Junior

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    Dave W
    #7 ChevyDave, Oct 19, 2025 at 4:35 AM
    Apologies Hideyuki, that was my attempt at humor. It appears you attached the wrong photo to your original post. The image appears to be a close-up of a 250 LM front fender, not a 308 intake manifold.
    - Dave
     
  8. mike996

    mike996 F1 Veteran

    Jun 14, 2008
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    Mike 996
    #8 mike996, Oct 19, 2025 at 11:56 AM
    I thought the original post was supposed to be humorous! Can't think that the OP didn't realize it was wrong pic after the first couple of replies so I thought it was SUPPOSED to be funny. Though I wasn't sure how...so I figured I just didn't "get it."
     

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