355 Leak Down results bad or good | FerrariChat
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355 Leak Down results bad or good

Discussion in '348/355' started by Hawaii, Dec 12, 2009.

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  1. Hawaii

    Hawaii Formula Junior

    Jan 28, 2007
    847
    Maui
    Full Name:
    Emery
    #1 Hawaii, Dec 12, 2009
    On a 355 w/ 5000 miles since valve guides changed...is 8-10 percent good or bad??
     
  2. Oengus

    Oengus F1 World Champ
    Rossa Subscribed Silver Subscribed

    Sep 29, 2004
    10,861
    Between timing belts/chains or West Palm Beach FL
    Full Name:
    Chas
    #2 Oengus, Dec 12, 2009
    as long as its consistent across the 8 cylinders its ok
     
  3. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,288
    Cowboy Capitol of the World
    Full Name:
    Brian Crall
    #3 Rifledriver, Dec 14, 2009
    A good 355 motor will be under 5%. The Mahle rings seal so well we see under 1% on a regular basis. While I could not justify tearing down and repairing a motor with 8-10% I sure would not be happy with it.
     

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