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  1. #1

    Help! Weird puking coolant issue!!

    Hi guys

    The P-X has :-

    137 Engine Tech drop-in supercharger impeller with 3mm spacer
    RRPR necessary which includes fuel pressure gauge.
    60lb injectors:
    Riva 4" Rear air Intake:
    Riva Rear exhaust system:
    Rotax Racing ECU 8800
    RIVA Valve Train Upgrade
    Riva relocation intercooler kit
    light weight ferrea valves
    3 blades 15/20

    After 10-15 mins the plastic water tank puking the coolant everywhere inside hull )..Fill it again but the problem no sloved...After that i took it to the dealer and check :-

    1- Head gasket was fine
    2- Stock Thermo stat was fine
    3- All hoses r fine and no bending
    4- Head deck is fine
    5- Cylinders deck is fine

    Do u think im ranning LEAN?.....Here is the pix for the head chamber...It is look like it ran RICH actulaly....Here is the pix


    Note: After install new valves/valvetrain the mechanic installed old head studs so he use them one time! Also the boat has 65hrs only

    Right now i have new ARP heads studs and Rotax Thermo and ready to install them.
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  2. #2
    Fast & Loud meeper's Avatar
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    u should really put a rotax racing thermostat in there....

    i would start there.

  3. #3
    Having Fun jp1300r's Avatar
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    ? Can't figure out what you are saying. Are you saying he reused your head bolts or used new ones after installing valves?

  4. #4
    Moderator Snoman's Avatar
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    Quote Originally Posted by jp1300r View Post
    ? Can't figure out what you are saying. Are you saying he reused your head bolts or used new ones after installing valves?

    Hes saying the mechanic re-used the head bolts after he re-did the head ..

  5. #5
    Site Admin Green Hulk's Avatar
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    Just a thought......

    Follow the hose coming from the overflow tank to the side of the thermostat. If you look on the side of the thermostat there are two fittings. It should be on the fitting furthest forward. The hose from the oil cooler needs to be on the rear fitting on the side of the stat. If these hoses are crossed it will puke coolant out the overflow tank.

  6. #6
    Having Fun jp1300r's Avatar
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    Quote Originally Posted by Snoman View Post
    Hes saying the mechanic re-used the head bolts after he re-did the head ..

    Thats what I thought. A big NO, NO.

    Thats a good thought., Jerry

  7. #7
    Meeper...Installing RR thermo now

    jp1300r: snowman is right..The mechanic re-use old OEM studs sfter installed new valves/valvetrain parts.

    GreenHulk: I will check that

    How do u see the head chamber on the pix? it is RICH condition ...right?

  8. #8
    Having Fun jp1300r's Avatar
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    Do you have a picture of the pistons? Did he check the head and deck with a machist straight edge?

  9. #9
    Quote Originally Posted by jp1300r View Post
    Do you have a picture of the pistons? Did he check the head and deck with a machist straight edge?
    For pistons no i dont have and yes both head/cylinders decks is fine

  10. #10
    REID2168's Avatar
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    i bet the head gasket was popped and pressurizing the coolant system............not sure who confirmed your head gasket to be good after removal and viewing it BUT i bet its the issue.................i had two different motors with under 10 hours pop the first head gasket after valve installation and u COULD NOT TELL where it popped.........installed a NEW head gasket with copper coat problem solved............the second unit on the other boat popped with COPPER COAT and still showed good compression with a test before replacement with a new gasket to fix it...............nothing is a gaurantee............but after i replaced each one the issue that u r experiencing that i had was gone for good........... as well Jerry just popped a head gasket and couldnt find where it leaked but his boat is now fine as well after a new head gasket......id bet the farm on it...........good luck!

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