Oil blow out question

Discussion in 'General' started by eggfooyoung, Jun 14, 2018.

  1. eggfooyoung

    eggfooyoung You no eat more!

    300cc liquid cooled 2 stroke

    First ride, over heated, blew coolant out of the over flow.

    Changed to Evans, no issues since.

    Go to change the oil tonight. The transmission, and engine oil are in the same compartment. Per the manual, and let it idle to temp. Start backing the drain plug out, and BOOM, oil, blows out, everywhere. I'm talking head to toe covered. 12' diameter around me, soaked on the ground.

    What in the world would cause there to be so much pressure, in the transmission?

    Blown head gasket?


  2. BSA43

    BSA43 Well-Known Member

    Transmission oil and engine oil in the same compartment?

    You sure it's a 2-stroke?
    Sabre699, Slider82, t500racer and 3 others like this.

    MELK-MAN The Dude abides...

    major blow by maybe .. done a compression test ?
  4. eggfooyoung

    eggfooyoung You no eat more!

    No. Only 12 hrs on the thing.
  5. Steeltoe

    Steeltoe Breaker of chains.

    Not sure but I wish I could have seen/recorded that.
  6. Steeltoe

    Steeltoe Breaker of chains.

    Can you do it again?
    HPPT, scottn, Banditracer and 2 others like this.
  7. Rebel635

    Rebel635 Well-Known Member

    Plugged pcv? You must have shut it off on compression after compressing the crankcase.
  8. fastfreddie

    fastfreddie Well-Known Member

    Reason #1001 to wear safety glasses, even when there's no apparent danger in the procedure you undertake. Can you imagine having pressure-washed your eyeballs? I don't even wanna think about it.
    Kyle Brosius likes this.
  9. fastedyamaha

    fastedyamaha Well-Known Member

    Is this metalhead? Asking for a friend
    eggfooyoung likes this.
  10. 418

    418 Expert #59

    Does the transmission have a vent?

    The only other possible culprit would be leak between the engine and the transmission, possibly a bad crank seal?
    rob linders likes this.
  11. eggfooyoung

    eggfooyoung You no eat more!

    Not sure about a vent. I'll research more tomorrow.
  12. turner38

    turner38 Well-Known Member

    Has to be the trans vent plugged.

    Engine and trans in the same compartment......

    You were mixing oil in the gas werent you???
  13. t500racer

    t500racer Looking for the Bad Teacher's thread...


    Last edited: Jun 15, 2018
  14. renegade17

    renegade17 Well-Known Member

    Were you in some really gnarly stuff to overheat it?
  15. notbostrom

    notbostrom DaveK broke the interwebs

    Bad fuel petcock? the Aprilia rs250 had a run of bad petcocks that would fill the crankcase with gas
  16. notbostrom

    notbostrom DaveK broke the interwebs

    Doesn't Broome specialize in oil blowouts
    Gorilla George and ChemGuy like this.
  17. ChemGuy

    ChemGuy Harden The F%@# Up!

    he would have told him to pump more mud at it.
    Gorilla George and Steeltoe like this.
  18. eggfooyoung

    eggfooyoung You no eat more!

    Yeah, wrong bike. Was totally flustered when I posted. And covered head to toe in gear oil...
  19. You took an influx of formation oil because of an underbalanced situation due to insufficient hydrostatic pressure in the drilling column (typically caused by poor displacement management during tripping operations, contaminated drilling fluids, fluid losses into the formation, or by not strictly adhering to the weight-up schedule based on expected pore pressures).

    ...but im sure it was BP's fault.
    Kyle Brosius likes this.
  20. Kyle Brosius

    Kyle Brosius Well-Known Member

    Do you work in the oil/gas industry also? Or are you just quoting the deep water horizon movie?

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