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  1. #1
    gone fishing sucks2bu's Avatar
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    Got so hot it melted the intake manifold w//t//f

    Ok I'm working on a client's ski. According to him he put ski in the water and went out on a cruise. 30 minutes in he starts to smell what he described as burned oil. Then a bunch of smoke from engine compartment and engine locked up would not start.

    I'm looking it over and:
    Nastiest burnt oil smell ever in engine bay, oil on dipstick still has viscosity
    Keeps blowing the 3amp fuse, no start.
    Cranks over perfect at solenoid, not locked up.
    Knock sensor melted to block
    Cam sensor melted and distorted, hit timing chain and was cause of short.
    Intake manifold gaskets visible from top. Melted at bolt holes intake moved.
    I got it started but sounds like it's running on one cylinder.

    In all the years I've worked on these things I've never seen one get this hot. Ohhhh it's a 2015 gtx 155hp.

    I'll post pics of the melted parts shortly.

  2. #2
    raiderteen's Avatar
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    I am very shocked that not a single overheat sensor went off alerting the driver to an overheat. With that kind of melting, you are talking direct temperatures in the mid to high 200 degrees for an extended period of time. I would expect there to be no coolant remaining in the system (evaporated) and the head to be severely warped or even cracked.

    Any signs of a engine fire?

  3. #3
    gone fishing sucks2bu's Avatar
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    No engine fire but smoke was due to melting sensors and wiring for sensors. Knock sensor wiring melted to block. Cam sensor melted contacted the timing stud and stopped the engine cold. Water completely evaporated.

    Never seen one like this.
    Will take pics over the weekend.

  4. #4
    Myself's Avatar
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    Quote Originally Posted by raiderteen View Post

    Any signs of a engine fire?
    That's what I'm wondering. Is it possible an injector or fuel rail was leaking and it was a flash fire instead of a major overheat? I worked on an RXT this year that would start bogging and rough idling after 15-30 minutes of riding. I found fuel spewing into the bilge from a small crack at the top of the fuel pump assembly.

  5. #5
    raiderteen's Avatar
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    Quote Originally Posted by Myself View Post
    That's what I'm wondering. Is it possible an injector or fuel rail was leaking and it was a flash fire instead of a major overheat? I worked on an RXT this year that would start bogging and rough idling after 15-30 minutes of riding. I found fuel spewing into the bilge from a small crack at the top of the fuel pump assembly.
    I just can't picture a overheat situation where the engine would run/survive long enough to get things that toasty. On top of that the cluster and buzzer had to not be functioning, or the operator is an absolute bonehead (believable these days).

  6. #6
    ptscon's Avatar
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    Quote Originally Posted by raiderteen View Post
    I just can't picture a overheat situation where the engine would run/survive long enough to get things that toasty. On top of that the cluster and buzzer had to not be functioning, or the operator is an absolute bonehead (believable these days).

    Hard to believe but its possible. Earlier this season buddy popped a coolant hose off and the motor got so hot it melted plastics including the battery bracket that's not even in direct contact. Even gaskets melted spewing oil out of the engine. Shutting off for alarms is optional I guess.

    Motor was done of course, you can't have it running that hot and survive.

  7. #7
    gone fishing sucks2bu's Avatar
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    Motor still runs but with a miss. Oil still has viscosity according to the rub it between your fingers method. Plastic water box is trashed. Water box has every sticker on it melted. Hoses appear to be ok. No temp alarm went off. Weird I know. But judging from when I put key in and no sounds from display are heard. I will give the owner the benefit of the doubt. This weekend I'll upload pics.

  8. #8
    Bob 1tommygunner1927's Avatar
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    What year and model ski? May not be worth fixing.

  9. #9
    gone fishing sucks2bu's Avatar
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    Quote Originally Posted by 1tommygunner1927 View Post
    What year and model ski? May not be worth fixing.
    2015 gtx. 155hp

  10. #10
    gone fishing sucks2bu's Avatar
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    Looks like it's new. I just bought it for crackhead money.


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