Oil Leak Pictures...... Any Ideas??

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by DeeGee, Jul 8, 2009.

  1. Steverino

    Steverino Arrogant Horse's Ass #1

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    I chased leaks until to replaced the check valve on the crank case vent tube. Then no more leaks.

    Well except for that seep at the cracked case, but that is another story.
    #41
  2. erappaport

    erappaport pray for rain

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    Are you referring to the valve at the inlet, on top of the airbox?
    #42
  3. Steverino

    Steverino Arrogant Horse's Ass #1

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    No I am referring to the valve that is about 1/2 way down the hose that attaches to the air box and at the motor.
    #43
  4. erappaport

    erappaport pray for rain

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    Yeah, don't seem to have a check valve. It's an early '04, so I'll guess either it never had one or the PO took it out. Can any veterans of the OP switch replacement job tell me if it can be done without pulling off the air box & carbs?

    Thanks, ER
    #44
  5. DeeGee

    DeeGee I'm a Yorkshireman thanoz

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    Afraid so my friend, PITA to get to for such a simple job. Fuel tank, airbox and carbs to get to the pressure switch. Don't forget to order a new copper washer too as it's got it's own part number :deal
    I'm sure the dealer will know which one it is when you order the switch.

    HTH

    DG
    #45
  6. erappaport

    erappaport pray for rain

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    I was afraid of that. It figures that I just had the thing apart for valves & cables. :kboom

    Fortunately, winter is coming fast to the colonies, plenty of time for indoor projects and not much use for scooters.
    #46
  7. AdvGa

    AdvGa Long timer

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    I just found I had a small Oil Leak from the Rear of the Engine and found it came from the Gear Position Sensor (Engine/ Shifting Mechanism #25, #26 per the microfiche '06 ADV) by the Red Arrow.

    Hopefully the Formagasket used will do the job.

    [​IMG]
    #47
  8. StmbtDave

    StmbtDave AKA Invisible Dave

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    I had the exact same leak. Don't mess with Formagasket. There is no gasket between the sensor and the case, only an O-ring. You can pull the cover and very little oil will leak out. The local dealer didn't have the proper O-ring in stock so I picked one up at Ace Hardware. Seems to me the proper one is 27.5mm x 2.5mm and the one I used was 27mm x 2.5mm. So far, no leaks :clap.

    Dave
    #48
  9. AdvGa

    AdvGa Long timer

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    Dave,
    Thanks for letting me know... I'll print off you info and take it into Ace for a replacement.

    Appreciate the heads up!
    #49
  10. erappaport

    erappaport pray for rain

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    What is it about these bikes that makes it so hard for the oil to stay in the engine, where it belongs? If you looked at my garage floor, you'd think I owned a Harley. And I hear that even they don't leak oil anymore.
    #50
  11. AdvGa

    AdvGa Long timer

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    Just came back from ACE Hardware an could not find the correct size... yet. Will have to go to another store to see if they have more available.

    So far the Formagasket is holding up and the leak has stopped.

    It must be the heat from the aluminum engine to the Plastic Swithch/O-Ring changing shape ever so slightly because it was never tampered with.
    #51
  12. Dustodust

    Dustodust Long timer

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    I have been doing this insane 103 miles each way commute lately , I cruise 95 mph at about 4:30 am with motorcycle cops on their way to work passing me while splitting lanes at 85 mph into Los angeles


    a really bad oil leak popped up this morning so I remembered this thread and dug it up.
    there was a big puddle under it at the gas station
    My leakage looed just like the pictures here
    I took off the carbs and the sensor was finger tite
    took off the skidplatee and couldnt find anything
    cleaned and tightened it back up hope it cures it

    guess I'll find out when i test it and report back
    #52
  13. Dustodust

    Dustodust Long timer

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    rode all week with the leak 1050 miles of splitting lanes and 95 mph cruising
    used up a half a stick of oil leaked out huge puddle when I stop after going high speed freeway . it seems high speed related .
    so far it started right after I found a leaky line at the suction side exiting the oil tank, the factory crimp on clamp was loose so I replaced it and it cured the cam chain random rattle
    then this popped up
    I thought it was the neutral light switch and siliconed that all up but no dice, then the oil pressure sender (unless the sender itself is leaking

    i need to strip the tanks and skidplate off and try again, damn this leak is hard to find ! seems like it happens after cruising over 90mph if Im not mistaken:huh
    #53
  14. Gordonktm

    Gordonktm Been here awhile

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    Do your best and silicon the rest:rofl
    #54
  15. Dustodust

    Dustodust Long timer

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    i took off the tanks and see the oil sender leak is gone now bone dry but the highest point of wetness is at the base gasket on the left rear cyl

    I swear mine looks just like dee-gees but the base gasket on the cyl looks wetter , so why take pics

    this is strange
    can tbelieve that much oil could come out of the cylinder base gasket
    nothing all
    where the hell is all that oil coming from that leaks onto the ground when I come down from high speed ?
    I can run down to the store and not a drop

    it's not the valve covers
    not the heads
    not the main cases
    not the oil pressure sender
    not the neutral light switch
    not the oil tank breathers
    not the check ball screen on the oil tank or the suction tube
    and not the crankcase breather either
    not the drain plug
    not the oil screen
    not the oil filter cover

    can the alternator cover or the base gasket on the left rear leak that much ?
    i mean a puddle about 3" (75mm) DIA
    #55
  16. Dustodust

    Dustodust Long timer

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    I glad you think its funny :rofl

    its starting to piss me off :baldy
    i need to find a place around the garage where i can hit 90 mph with just the left tank on to see where it leaks with that talc powder test
    #56
    jlambo likes this.
  17. Leodis41

    Leodis41 I wanna Orange one!!

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    #57
  18. viola-tor

    viola-tor Needs to ride!

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    Hopefully you got it sorted by now, I JUST fixed this leak on mine a few days ago. I "laid 'er down" (like the Harley guys :lol3) 'cause I recently did an oil change and didn't want to lose $30 worth of synthetic.

    [​IMG]

    I took the o-ring to several auto-parts stores with no luck, their o-rings were way to thick. I went to the mega Jap bike dealer and found one in their o-ring bin that was a little smaller in diameter and slightly thicker than the stock. It stretched on fine and sealed the hole even solidly with no wiggle room. Sorry, I don't know the actual size, me and the parts guy kinda eyeballed it, but I should've confirmed... Just came in from a 600 mile "test" (:super) and not a drop leaking!

    Hope that helps.
    #58
  19. Dustodust

    Dustodust Long timer

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    Oh yeah !
    thanks , I didnt think of that !
    it could be it
    mystery leak from invisible area between the V
    could explin why it leaks at high RPM (crankcase pressure) and not oil pressure

    Its snowing now so the 90mph test will have to wait

    just hope its not the base gasket its got at least 27,000 on the odometer but i traded it used for a 576 RFS build in '07 from a sort of flaky guy so who knows if the speedo was changed out , it originated from montana
    #59
  20. erappaport

    erappaport pray for rain

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    Hopefully base gaskets are not the answer for me, either. Winter is coming, but I'm still not excited about a teardown to that level. Only 20,000 miles for me, so I'll hope the odds favor something simpler.

    Anybody who's pulled the starter motor cover have some pix?
    #60