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  1. #1

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    Leak Down Test (Mity Vac)

    Leak Down Test

    please post a link or procedure on how to pressurize the crankcase
    with my MITY VAC to test for leaks.

    original post here:
    http://www.greenhulk.net/forums/show...t=59357&page=9


    thank you,
    waiting...


  2. #2
    Moderator beerdart's Avatar
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    If you have a leak larger than the stroke of the mity vac than you will never pressurize. Most peeps use a compressor with a GOOD regulator.

  3. #3

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    aslo would like to know what you guys use to block/seal of all the ports?
    whats the best thing to do ??

    it seems im leaking from the ports where i blocked everything

    thanks....

  4. #4
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    I think Xlint uses raquet balls.

  5. #5
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by Keddano View Post
    I think Xlint uses raquet balls.
    Yes I do. and they work great.

    1 full racquette ball in the exh manifold. (must remove exh pipe)

    And 2 racquette balls cut in half (a touch smalller than half) for a total of 4 halves. Those go into the intake manifold. (must remove carbs)

    Then attach the vac pump to the pulse fitting and pump away.

    My last test done about 2 weeks ago held. 10 in. vac only dropped to 7 in. over 10 mins. WAY good seal from the racquette balls.

  6. #6

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    Quote Originally Posted by xlint89 View Post
    Yes I do. and they work great.

    1 full racquette ball in the exh manifold. (must remove exh pipe)

    And 2 racquette balls cut in half (a touch smalller than half) for a total of 4 halves. Those go into the intake manifold. (must remove carbs)

    Then attach the vac pump to the pulse fitting and pump away.

    My last test done about 2 weeks ago held. 10 in. vac only dropped to 7 in. over 10 mins. WAY good seal from the racquette balls.


    thank you for the advice,
    are you talking about yellow tennis balls ?
    or you mean Squash Balls ?
    not too sure what you mean by racquette balls ?
    Last edited by klze; 06-24-2008 at 11:46 AM.

  7. #7
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Not tennis balls.

    Not squash balls. (usually black and smaller than racquette balls)

    Raquette balls. (Blue an about 3" diameter)

  8. #8

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    hhmmm, interesting.


    I got racquette balls (too big ) (blue)

    I got squash balls (almost but small) (black)

    I got tennis balls (way too big) (yellow)

    and nothing seems to fit just right to close the air leak.
    will try a couple more stores, not much of a selection on this balls I got to tell you.

    if anyone knows a place in Ontario, Canada where this balls can be purchased, please post here.

    Thank you!

  9. #9
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by klze View Post
    hhmmm, interesting.


    I got racquette balls (too big ) (blue)

    I got squash balls (almost but small) (black)

    I got tennis balls (way too big) (yellow)

    and nothing seems to fit just right to close the air leak.
    will try a couple more stores, not much of a selection on this balls I got to tell you.

    if anyone knows a place in Ontario, Canada where this balls can be purchased, please post here.

    Thank you!
    Can't you sqeeze the racquette balls to fit? You need an AIR TIGHT seal.

    And the intake manifold needs the balls cut in half. Or just under half.

  10. #10

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    Quote Originally Posted by xlint89 View Post
    Can't you sqeeze the racquette balls to fit? You need an AIR TIGHT seal.

    And the intake manifold needs the balls cut in half. Or just under half.

    I can if I try hard enough.

    measured the ball today, its 2" instead of 3" like you said.
    and mine is green instead of blue actually.

    the manifold is way too big for this balls, only thing that works is blocking the actual ports, the only problem there is how to block the water ports ??

    thanks...

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