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  1. #1
    VdeKock's Avatar
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    Just did a Pressure test

    I just did a pressure test on my EFI GPR after a new top end rebuild,
    and it drops from 10 to 6psi in 6minutes.... and after 8minutes it is @5psi.

    is this to much loss..??, i found the rear crank seal leaking

    see pics and video

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  2. #2
    The seal is obviously leaking. How many hours are on that seal? If it were me I'd probably pull the engine out and just do it, but being EFI maybe this isnt such a big issue like it would be for a carb'ed motor. Why did the engine need a new topend, and do you suspect the seal may have contributed to engine failure?

    Maybe someone else can pipe in before you rip the engine out though.

  3. #3
    VdeKock's Avatar
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    Quote Originally Posted by ZeroClient View Post
    How many hours are on that seal?
    The engine did not blew this time, it took some water and there was a slight score on the pistons.
    I just got my Cylinders back from porting and decided to replace all 3pistons to start fresh.

    The crank has 20hours on it, so i guess the seals also... But that wasn't my rebuild

  4. #4
    wotxxxsd's Avatar
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    Those really aren't bad #s.
    But if you see a seal leaking I'd fix it before it leaks more.

  5. #5
    The crank has 20hours on it, so i guess the seals also... But that wasn't my rebuild
    If you dont have proof in the form of a service work order or parts list and a garantee then it's safer to assume the work was not done/right. Better to do it right yourself then someone else to do it wrong. Getting all the gremlins out will get you riding in peace without worrying about your new topend.


    If the seals WERE replaced just 20 hours ago, then I'd expect you'll find some ebay-special part in there perhaps from a low quality full-seal kit. Use OEM or better only if we want/hope for it to last more than 20 hours.

  6. #6
    wotxxxsd's Avatar
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    +1 oem seals that I've used last longer than eBay specials...

  7. #7
    VdeKock's Avatar
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    I already have new OEM Seals, but what a b*t*h is that PTO coupler...
    i couldn't get it off the crank.
    im waiting for some tools to remove it, its best to put it back in the case and hold the flywheel with the tool.

    Click image for larger version. 

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  8. #8
    Happily Self-Employed WFO's Avatar
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    I use a coupler tool and 1/2 inch impact gun to get those off

  9. #9
    VdeKock's Avatar
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    Quote Originally Posted by ZeroClient View Post
    I'd expect you'll find some ebay-special part in there perhaps from a low quality full-seal kit.
    And i did find some NON-OEM Seals

  10. #10
    VdeKock's Avatar
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    Quote Originally Posted by WFO View Post
    I use a coupler tool and 1/2 inch impact gun to get those off
    this is the correct one for a 1300 right??

    http://www.shopsbt.com/jetski/80-403.html

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