Air leak... HELP!!

Discussion in 'Do It Yourself' started by Mykie1square, Apr 18, 2018.

  1. Mykie1square

    Mykie1square New Member

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    I'm doing a leakdown test and there is air coming from a vent tube near the air intake manifold. I can't find anything about what it is or where the leak is actually coming from. I assume it's a crack in the case from the cylinder to the trans but I'm not sure. Can someone please tell me how to fix this leak?!?!
     
  2. dirtysquared

    dirtysquared DirtyDirty Forum Supporter

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    Either that or a bad crank seal is pressurising the clutch case.
     
  3. Larry's Shee

    Larry's Shee Active Member

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    First thing to do is find EXACTLY where the leak is.
    Could be a crank seal, or case halves could be leaking.drain oil or tip it on it's side ,pull cluch cover and spray crank seal with soapy water.
     
  4. speedyslyder

    speedyslyder 2 STROKES RULE Technician Forum Supporter

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  5. Larry's Shee

    Larry's Shee Active Member

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    If one seal is bad, the other can't be far behind. If you consider the age of these, consider it a maintenance item.
    Worked on one that had virtually sucked the trans dry, though owner never mentioned excess smoke.
    Was actually my first experience with a runaway engine. :eek:
     
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