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Piston to valve.

Discussion in '348/355' started by Andy 355, Jun 4, 2014.

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  1. Andy 355

    Andy 355 Formula Junior

    Jun 2, 2013
    434
    Sydney
    #1 Andy 355, Jun 4, 2014
    Hi Guys! Just had the guides done on the 355 and i thought i might check the piston to valve clearance. Have not seen this measurement anywhere.. I have a crushed head gasket and the old nuts. Love to hear from experenced 355 engine builders on this one. Cheers!
     
  2. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,288
    Cowboy Capitol of the World
    Full Name:
    Brian Crall
    #2 Rifledriver, Jun 4, 2014
    Just like any multi-valve engine. It has a lot of clearance.


    Small valves at small angles with not very radical timing just like all multi-valve motors.


    Why?
     
  3. Evan.Fiorentino

    Evan.Fiorentino F1 Rookie

    Aug 23, 2005
    2,854
    South East Florida
    Full Name:
    Evan
    #3 Evan.Fiorentino, Jun 4, 2014
    Better get some clay in there!
     
  4. Andy 355

    Andy 355 Formula Junior

    Jun 2, 2013
    434
    Sydney
    #4 Andy 355, Jun 4, 2014
    I Figured since i have no idea what the clearance might be id better check it? When the heads are serviced they surface grind them,although only took about 5thousands of an inch off. What do you guys think of k-line guides? Just a question that was all. Thanks again everyone!
     
  5. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,288
    Cowboy Capitol of the World
    Full Name:
    Brian Crall
    #5 Rifledriver, Jun 4, 2014
    The space is very big. It has never been an issue and .005 is so far less that the service limit it is a waste of time.

    Time far better spent on things that matter.
     
  6. Andy 355

    Andy 355 Formula Junior

    Jun 2, 2013
    434
    Sydney
    #6 Andy 355, Jun 5, 2014
    Ok... Now how about if after that .005 was taken off we are now on or maybe a thou or 2 under the service spec... Thanks for your help Rifledriver! You must have rebuilt a few of these little gems before!!
     
  7. Andy 355

    Andy 355 Formula Junior

    Jun 2, 2013
    434
    Sydney
    #7 Andy 355, Jul 12, 2014
    Bump
     

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