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Thread: Blowin' Water

  1. #1
    Kindsvater Flat
    Ok.....some of you I have called but I would like other input also. Last sunday at wide open throttle, 65-6600, the motor blows water from between the head and the block. There is NO water in the motor. It will not do it sitting still at that rpm. It will do it underway. Now it never did this before I went to the alum heads, bigger pistons, cam etc.... I also changed the gears from 12% to 19%. Obviously speed is the issue. Here is a diagram of how it is plumbed. This is also the smaller neovane pump.
    http://www.v-drivevideo.com/mike/plumbing.JPG
    Transom side.............................................. .....engine side

  2. #2
    Senior Member
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    Sounds like a water passage in the head gasket not sealed adequately (I have the same problem)... leaking externally only. I think it's likely more of a gasket match, sealing issue than a plumbing issue. The small neovane shouldn't have the capacity to overpressurize from my experience.

  3. #3
    Sangster
    Make sure you got the right gaskets for your application....I think Rexone's got the right info.. Leaky gasket..........
    BTW.. Whats the oil look like??

  4. #4
    Kindsvater Flat
    Originally posted by Rexone
    Sounds like a water passage in the head gasket not sealed adequately (I have the same problem)... leaking externally only. I think it's likely more of a gasket match, sealing issue than a plumbing issue. The small neovane shouldn't have the capacity to overpressurize from my experience.
    Ok...buuut... Its not leaking in just one place. Its leaking at both heads almost all the way around. I don't think its the neovane overpressurizing but a combination of the pump and the speed of the water being forced in at speed.

  5. #5
    Sangster
    Mike are you siliconing the intake to the block or using a gasket..
    I'm finding it hard to be a speed problem..

  6. #6
    Senior Member
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    Originally posted by Kindsvater Flat
    http://www.v-drivevideo.com/mike/plumbing.JPG
    Transom side.............................................. .....engine side
    OK, did anyone notice the fine detail of this schematic?
    NICE K Flat!!!!!!!1

  7. #7
    Kindsvater Flat
    Originally posted by Sangster
    Mike are you siliconing the intake to the block or using a gasket..
    I'm finding it hard to be a speed problem..
    DUDE.......Mopar, no water in the intake

  8. #8
    Junior Member Hud's Avatar
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    Indeed Mikey! very f**kin nice!

  9. #9
    Senior Member
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    Originally posted by Kindsvater Flat
    Ok...buuut... Its not leaking in just one place. Its leaking at both heads almost all the way around. I don't think its the neovane overpressurizing but a combination of the pump and the speed of the water being forced in at speed.
    You can easily answer this dilemma with a pressure gauge test.
    My guess is it's a head gasket match or sealing problem. What kind of heads and head gaskets are you using?

  10. #10
    Kindsvater Flat
    Originally posted by Jetboatguru
    OK, did anyone notice the fine detail of this schematic?
    NICE K Flat!!!!!!!1
    Detailed just for you buddy!! Sometimes its just hard to explain farmer engineering.

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