355 - F355 - Cylinder head restoration shops | FerrariChat

355 F355 - Cylinder head restoration shops

Discussion in '348/355' started by fboutlaw, Jun 3, 2019.

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  1. fboutlaw

    fboutlaw Formula Junior

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    Hey all,

    I'm in the market for a skilled machinist who can restore my tired F355 cylinder heads (leakdown was between 3-11% with one cylinder at 27%).

    I'm based in Northern California, but as I've sent out a lot of my parts around the US for refurbishment due to high costs and long lines for bay area machinists (+5 months at my mechanics recommended shop to get to the job). Anyone have any top notch recommendations in the US?
     
  2. markcF355

    markcF355 F1 Rookie

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  3. Ferrarium

    Ferrarium F1 Veteran Sponsor Rossa Subscribed

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    Is this an example of 355 valve guides that does not have issues having an issue?

    Sent from my LM-Q710(FGN) using FerrariChat.com mobile app
     
  4. SoCal1

    SoCal1 F1 Veteran Owner Silver Subscribed

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    Check for shops that specialize in ducati race bikes, they have a few tricks that work "most excellent" with the 355 heads. Get the corrected timing from them also. ;)
     
  5. 97 Spider

    97 Spider Formula 3

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    I’m confused, what do you mean?
     
  6. Ferrarium

    Ferrarium F1 Veteran Sponsor Rossa Subscribed

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    Ahh ok was not clear sorry. Is the issue with the heads the valve guides or something else not known?


    Sent from my LM-Q710(FGN) using FerrariChat.com mobile app
     
  7. Sportflight

    Sportflight Rookie

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    Call Daniel @ Bradan Coachworks - (631)585-8600

    He does excellent work, he is a sponsor here and is very knowledgeable in regards to the 355.
     
  8. fboutlaw

    fboutlaw Formula Junior

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    Leakdown:
    1 - 6%
    2 - 6.5%
    3 - 10%
    4 - 6%
    5 - 4%
    6 - 27% leaks from both intake and exhaust
    7 - 11%
    8 - 3%

    No leaks to the block past cylinders.

    I'm not 100% sure what the history is with the heads, but they're old and tired. There's a lot of buildup on the lower intake valves and some on the exhaust valves. I haven't checked the valveguides or seals yet, but the valve seats themselves need work. In the middle of pulling them off after testing.
     
  9. johnk...

    johnk... F1 World Champ Owner

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    If the guides spec ok cutting the seats and replacing a could of valves is a DIY job.
     
  10. taz355

    taz355 F1 Veteran Owner Silver Subscribed

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    I thought there was a good company in san louis obispo
    But cannot remember name
     
  11. jjtjr

    jjtjr Formula Junior

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    Would be a shame to condemn the valve guides if the seals are the cause for the carbon buildup and subsequent leakdown :(
     
  12. yelcab

    yelcab F1 World Champ Consultant

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    He did not condemn the valve guides. He said it was tired and time for a valve job. Come to think of it, I have never seen a Cylinder 6 fail. Only CyL 2 or Cyl 7.
     

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