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Flathead help

Discussion in 'The Hokey Ass Message Board' started by hemi guy 53, Dec 14, 2010.

  1. hemi guy 53
    Joined: Dec 30, 2007
    Posts: 266

    hemi guy 53
    Member
    from colorado

    Iam looking for some knowledge ,what would cause exessive smoke to come from the breather tube. p.s. no compression in #2 cylinder, broken ring? stuck valve? or?????
     
  2. 1950Effie
    Joined: Sep 30, 2006
    Posts: 798

    1950Effie
    Member
    from no where

    Typical blow-by. Rings typically the issue. Run a compression test first. On all cylinders.

    Squirt some oil in the cylinder and see if the compression comes back up. If so then the rings the culprit. Real easy to pull the intake. You sure can get a good look there on valve activity.
     
  3. hemi guy 53
    Joined: Dec 30, 2007
    Posts: 266

    hemi guy 53
    Member
    from colorado

    thanks there is no compresion on #2 the rest are at 55
     
  4. Bruce Lancaster
    Joined: Oct 9, 2001
    Posts: 21,682

    Bruce Lancaster
    Member Emeritus

    If you want to run the engine without an overhaul, look at cheap possibilities before you freak out. Look in sparkplug hole of dead cylinder while someone turns engine over several times BY HAND. See if both valves look like they are closing...a stored flathead will frequently sieze up a valve or two, usually lightly, so if one is staying open first try just pushing it closed with a probe of some sort after shooting some penetrating oil down past it. If it moves, more oil and several open and push cycles will likely freeitup. Zero rather than 10 or 20 suggests looking at valves before worrying about the rings there.
    Your compression is pretty low, but should allow the beast to be used until overhaul time. If Ol #2 can be gotten back online, give the thing a heavy dose of Marvel Mystery oil in pan and in gas...your rings might well just be sticky, and a good soak in miracle elixir may improve thigs all around...though while the MMO is in use it will of course cause some smoke itself.
     

  5. mercjurij
    Joined: Apr 21, 2010
    Posts: 86

    mercjurij
    Member

    Hey,
    i have similar problem, there is no smoke but oil coming out of the breather.

    the oilpressure is extremly high!

    pistonrings?
     
  6. hemi guy 53
    Joined: Dec 30, 2007
    Posts: 266

    hemi guy 53
    Member
    from colorado

    thanks bruce iam planning on pulling the heads and that is what i was thinking ,always nice to have a second opinion.
     
  7. Groovybaby6
    Joined: Dec 29, 2008
    Posts: 763

    Groovybaby6
    Member
    from Denver

    If the engine has been sitting a long time, it could be a stuck valve but it would run terrible and be noisy if a valve was stuck. You can run it without the plug in that cylinder and see what the valves are doing.
     

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