Engine case bleeding, built in chain luber?

Discussion in 'Dakar champion (950/990)' started by DirtyADV, Sep 8, 2012.

  1. DirtyADV

    DirtyADV Long timer

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    So chasing an oil leak and was suspecting a cylinder base gasket since a part of the rear cylinder base looks somewhat clean:

    <a href="http://www.flickr.com/photos/dirtyadv/7956397272/" title="Rear cylinder dirty by DirtyADV, on Flickr"><img src="http://farm9.staticflickr.com/8453/7956397272_f405978dc1_z.jpg" width="640" height="512" alt="Rear cylinder dirty"></a>

    So after alot of cleaning up this:

    <a href="http://www.flickr.com/photos/dirtyadv/7954242600/" title="Stripped and ready for cleaning by DirtyADV, on Flickr"><img src="http://farm9.staticflickr.com/8030/7954242600_0bb6afcce4_z.jpg" width="640" height="480" alt="Stripped and ready for cleaning"></a>

    I find some cracks in the paint in front of the front sprocket:

    <a href="http://www.flickr.com/photos/dirtyadv/7956408240/" title="Hard to see but paint is cracked by DirtyADV, on Flickr"><img src="http://farm9.staticflickr.com/8311/7956408240_b3229536dd_z.jpg" width="480" height="640" alt="Hard to see but paint is cracked"></a>

    And after some idling there seems to be oil seeping out:

    <a href="http://www.flickr.com/photos/dirtyadv/7956404968/" title="Seeping out by DirtyADV, on Flickr"><img src="http://farm9.staticflickr.com/8036/7956404968_45ef52f0a4_z.jpg" width="480" height="640" alt="Seeping out"></a>

    Still have not fully investigated the cylinder bases but that crack worries me.

    What to do next? Try to peel away some paint to see better?

    If you had similar problem or have ideas please share with me!

    /Johan
    #1
  2. Navin

    Navin Long timer

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    Miles/age? Wow, if that ends up being confirmed as the source I'd be getting it clean from behind as well and forming a V groove to be filled with weld.

    In a pinch, dremel a groove, clean it well and bead expoy in it. Ugly anyway you look at it.
    #2
  3. DirtyADV

    DirtyADV Long timer

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    -04 with 55 000 kms on it.

    There are more cracks in the paint in that area, a friend said stress fractures and safest is to make it a spare parts engine before the fracture breaks and there is a bent crankshaft cause of it. Well we were both drunk while discussing my bike problems.

    And to hung over today to dare go look at it more (I dont dare to drive yet, maybe not at all today).

    EDIT: Going to break open the paint along the crack to see better what it looks like might try to borrow my sisters camera also that is capable of alot better pictures then the iPhone.



    /Johan
    #3
  4. charlie264

    charlie264 Long timer

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    Give it a real good clean...de-grease the area....puff a load of talcing powder over the area...let the motor run....you'll see where its leaking from....dout its coming from the cracked paint in your photo......
    #4
  5. DirtyADV

    DirtyADV Long timer

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    Will look at it more!

    Have to look for some powder to help in the search, might flour powder work if I cant find any talcing powder?

    I could see small bubbles forming from the crack so something is pushed out of it!

    /Johan
    #5
  6. charlie264

    charlie264 Long timer

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    You must know someone with small kids..or foot powder...
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  7. DirtyADV

    DirtyADV Long timer

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    Im sure I have seen some baby powder at my dads place, would not be surprised if its from when me and my sister were small.

    Have a friend living close to my dad also that have a young child so Im sure it will work out.

    Know I have seen some spray can at work labeled "leak finder" but it might be for air leaks and its a long detour to go look what that was for.

    /Johan
    #7
  8. Alleycatdad

    Alleycatdad Unbunch yer panties!

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    spray foot powder or deodorant (powder) is awesome for this, it's just sticky enough to stay put.

    S
    #8
  9. MortimerSickle

    MortimerSickle Semi-Adventurer

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    Have you checked your oil pressure sending unit? Oil leaking from that could be spreading to the area you are seeing.
    #9
  10. DirtyADV

    DirtyADV Long timer

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    <a href="http://www.flickr.com/photos/dirtyadv/7956391992/" title="Oil pressure sensor clean by DirtyADV, on Flickr"><img src="http://farm9.staticflickr.com/8450/7956391992_649c0b1d5e_z.jpg" width="640" height="512" alt="Oil pressure sensor clean"></a>

    Cant see any signs of leak around the pressure sensor.


    Found some powder against athletes foot that I guess is mainly talc powder.


    Cant see any leak from the cylinder bases but ripped out the air box to see better and also took away the battery box in the front to clean the front better but that have to wait until tomorrow.

    Might put air box back and continue feeding it fuel from the rear tank and use it some and keep a close eye on any leak.

    Seems to be some minor leak around the clutch slave also.



    But there is for sure leaking from that crack visible in the powder or could it be degreaser finding its way in there and boils out when engine it hot?



    /Johan
    #10
  11. dmn0507

    dmn0507 Been here awhile

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    It could also be oil coming out the paint crack, maybe its partly peeled off and there is some oil in there, but of course my is just a guess.
    #11
  12. DirtyADV

    DirtyADV Long timer

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    Have been able to do some test riding now, was plenty fun like this:

    <a href="http://www.flickr.com/photos/dirtyadv/7973217624/" title="Ready to rock by DirtyADV, on Flickr"><img src="http://farm9.staticflickr.com/8313/7973217624_f7a42b08fa_z.jpg" width="640" height="428" alt="Ready to rock"></a>

    And rear cylinder base is for sure a problem:

    <a href="http://www.flickr.com/photos/dirtyadv/7973213312/" title="Right side rear cylinder base by DirtyADV, on Flickr"><img src="http://farm9.staticflickr.com/8039/7973213312_4af5d97914_z.jpg" width="640" height="428" alt="Right side rear cylinder base"></a>

    No real oil out of the crack I was worried about blew it out with compressed air so hopefully its just a little pocket under the paint that had stored some oil or degreaser that was boiled out from a hot engine.

    /Johan
    #12
  13. BoulderGuy

    BoulderGuy out ridin'....

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    Oh boy. You sure, like really sure, that its not the oil pressure switch in between the cylinder heads/ under the air box? That would be alot easier to fix!
    #13
  14. DirtyADV

    DirtyADV Long timer

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    Yes I know was hoping for the easy fix but there are no signs what so ever on the front cylinder, hard to get any good photos:

    <a href="http://www.flickr.com/photos/dirtyadv/7973211236/" title="Right side front cylinder base by DirtyADV, on Flickr"><img src="http://farm9.staticflickr.com/8443/7973211236_1cd77b84a9_z.jpg" width="640" height="428" alt="Right side front cylinder base"></a>

    Will be running it as is some more both to keep track of the crack in front of the sprocket and how much seems to leak, was planning to run more today but had some light rain and would prefer to use it when its dry to not have unnecessary water spreading any oil leaking.

    /Johan
    #14
  15. bloc

    bloc Been here awhile

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    How many miles on the engine?
    #15
  16. DirtyADV

    DirtyADV Long timer

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    55 000 kms so about 34 000 miles.

    Might add that the cylinder head nuts was not replace until 20 000 kms when I did my first service myself but that just shows how much authorized dealers are worth (NOTHING) since it was serviced 3 times by dealers and that had not been preformed even if the KTM had gone out with that info even before this bike was put into traffic.

    Not sure what that would do to lifespan on gaskets if that would affect the short life.

    Its a -04 but was not sold until sometime 2005.

    Would prefer not to develop a "pyndon syndrome" with material worn away from the engine case, would love to find a picture of that but dont have time to go through his monster thread right now.


    Its late but think I have to go down to the garage again and look more closely on the pressure sensor.


    /Johan
    #16
  17. DirtyADV

    DirtyADV Long timer

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    Nope pressure sensor looks all clean:

    <a href="http://www.flickr.com/photos/dirtyadv/7974250504/" title="Oil pressure sensor by DirtyADV, on Flickr"><img src="http://farm9.staticflickr.com/8040/7974250504_28a9eee177_z.jpg" width="480" height="640" alt="Oil pressure sensor"></a>

    And no signs along the base of the front cylinder:

    <a href="http://www.flickr.com/photos/dirtyadv/7974246886/" title="Front cylinder base by DirtyADV, on Flickr"><img src="http://farm9.staticflickr.com/8319/7974246886_ba2e25fbd2_z.jpg" width="640" height="480" alt="Front cylinder base"></a>

    Im in for pulling a cylinder it seems like, worth just swapping the rear? Or pull both while having the engine out of the frame if cases look good.

    /Johan
    #17
  18. DirtyADV

    DirtyADV Long timer

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    Went through pyndons thread and by doing something about it now hopefully this can be avoided even if I have had a minor oil leak for a while:

    [​IMG]

    His entire thread here.

    /Johan
    #18
  19. charlie264

    charlie264 Long timer

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    Long shot...check head bolt torques.....I said long shot....Looks like gasket or that cavitation freaky thing pyndon had. Talc works well though/
    #19
  20. bloc

    bloc Been here awhile

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    That's exactly what I was wondering about, unfortunately. Just wanted more data points as I'm about to pick up a 950 i just bought with 30k miles.
    #20