Leaking oil????? Please help!!

Discussion in 'Motorized Bicycle General Discussion' started by matesrates, Jun 3, 2010.

  1. matesrates

    matesrates New Member

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    Hi all
    I have a 49cc silver engine
    It seems to be leaking oil at the top gasket where spark plug is srewed into
    I had a close look at it, the gasket seems to be warped..I tryed to tighten head bolts but they are very very tight already

    So whats a cheap fix for this problem??????

    Any comments more than welcome

    Thanks in advance
     
  2. BarelyAWake

    BarelyAWake New Member

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    Sounds like a failed head gasket matesrates, not that big a deal :)

    You can order a new gasket from a vendor (cheap & easy) or make your own by tracing the old gasket on a sheet of thin aluminum or even copper (the same or slightly thinner than original, thinner increases compression). If you've kept on top of the head bolt torque (lol) then that's not the only problem - you may have a slightly warped head, also a pretty easy fix ;)

     
    #2 BarelyAWake, Jun 3, 2010
    Last edited: Jun 3, 2010
  3. Goat Herder

    Goat Herder Gutter Rider

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  4. robin

    robin Member

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    I thought they all leaked oil-that they were designed that way-as a form of self lubrication--i have more oil on my garage floor than my car leaks. LOL
     
  5. Goat Herder

    Goat Herder Gutter Rider

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    Its just marking its territory!laff
     
  6. BarelyAWake

    BarelyAWake New Member

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  7. matesrates

    matesrates New Member

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    Thanks for the reply
    The oil is leaking from top of head where the spark plug connects into
    Just confirming the bottom gasket on head is the base gasket
    And top gasket is head gasket??

    Thanks for your help
     
  8. corgi1

    corgi1 New Member

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    If the oil is comming out where the spark plug is ,then I think the oil level in the crankcase is way too high
     
  9. TerrontheSnake

    TerrontheSnake New Member

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    Oil is actually comming out of the same hole as the plug? Or about an inch or so below where the head connects to the jug?
     
  10. Goat Herder

    Goat Herder Gutter Rider

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    It will build oil around the head gasket if it is loose. [Nuts at the head gasket]. Once you get those nuts on the head gasket tight again you will probably notice a lot more power from the motor. Loosing compression at the head gasket robs power.


    Tighten the nuts in an X pattern it is important to do it evenly. A torque wrench to about 20 foot pounds is the official way. If you got no torque wrench by hand will have to do . Do it evenly and no tighter than one puts a spark plug in will be about right.
     
    #10 Goat Herder, Jun 3, 2010
    Last edited: Jun 3, 2010
  11. matesrates

    matesrates New Member

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    Hi there thanks for the reply
    Oil is leaking where the top head connects to jug...About a inch away from spark plug
    Not out of spark plug hole
    What do you think of this??brnot
     
  12. matesrates

    matesrates New Member

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    Thanks for the reply
    How do i clean out the oil????
    Also the gasket is warped..
    But head bolts tight
    What do you think of this??
    Thankszpt
     
  13. Goat Herder

    Goat Herder Gutter Rider

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    Give us picts if the gasket is warped something is not right. How could a gasket be warped uneven surfaces on the head or jug . even perhaps the gasket had been put on wrong from factory. Get a straight edge and check over the jug surface and the head. Let us know.
     
  14. matesrates

    matesrates New Member

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    The bike is second hand maybe they put it the wrong way..
    Possibly if i put it the right way and put washers under the nuts it might help tighten up that extra bit??....
    But is it normal for a 2 stroke ....To have oil around the top of engine????
    Maybe last person ran a rich mixture??
    I bought it cheap just to play around with it..
    I have another bike i ride with near new motor
    Thanks for your help
     
  15. Goat Herder

    Goat Herder Gutter Rider

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    Clean it up too and observe it. Get some brake cleaner. You don't have to go and tighten it a ridiculous amount that's not good ether. It is possible there might be a defect in the surfaces but that is pretty rare.
     
  16. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    A lot of the time, if the plug has been removed, the "gasket" or washer is smashed down and it will leak a bit. Not a big deal. If the head gasket is leaking, just replace it.
    It also may be leaking around the exhaust, since those gaskets are notoriouly bad.

    I would just keep an eye on it after you clean it the best you can, and see where it's actually coming from.
     
  17. corgi1

    corgi1 New Member

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    Are the 4 head nuts cap nuts or regular ones,,,(the cap nuts may be bottomed out)
     
  18. matesrates

    matesrates New Member

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    Thankyou goat herder and all the other people who help me
    I just undone the head cleaned it all up..Put gasket glue on both sides of gasket them put all back together..
    Not one oil leak :)
    But maybe glue might melt so i see how it goeszpt
     
  19. 2door

    2door Moderator
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    What kind of "glue" did you use? There are products made for sealing gaskets. Some will even take the heat of an exhaust flange. Check the label on the material you used. It should tell you if it is heat tolerant or compatible with gasoline/oil and recommended for cylinder heads.
    Tom
     

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