Boxer engine FULL of gas for 1.5 YEARS (shit)

Discussion in 'Airheads' started by petefromberkeley, Dec 5, 2011.

  1. petefromberkeley

    petefromberkeley -

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    Title says it. I parked my R100 GS a year and a half ago and last night went out to change the oil (just because it had been sitting) and give it some love in general. I have the alcohol resistant carb kit on it which has no overflow. So apparantly one of the carb needles didn't seat right and ALSO the petcock was closed but leaked and the top end filled with gas, leaked past the rings and filled the engine. I opened the drain plug expecting oil to come out and a gallon of gas/oil gushed out. I cursed a bunch and filled it with motor oil and that's it. Soooooooooooooooooooo

    What do I do? How bad do you guys think this is? I haven't started it yet.

    I can't imagine if the gas would have gotten into places that oil does not. I saw some gaskets weeping gas that never leaked oil. Jeeze, what manner of damage to you think this will cause? I guess it's better than water in there- or is it? Shit, I just don't know.

    This isn't the first time this stupid alcohol proof float kit has given me trouble, but it is definitely the last. That junk is outta here- back to stock.

    Thanks in advance.
    #1
  2. Barman

    Barman Way Offline

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    Not really much that can be done, depends on how proactive you want to be.
    If I were in the same place I'd change oil and filter, get it running properly and sort issues out as/if they arise. Change the oil after the first 100 miles or so. Could have done no damage at all.
    #2
  3. bikerfish

    bikerfish flyfishandride

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    I'd go with what barman says. change the oil and filter run it for a few miles, change oil and filter again. I'd just ride it and play it by ear, unless you are planning a long trip in the not too distant future, then I'd buy something else to ride and worry about the gas filled engine later!
    #3
  4. petefromberkeley

    petefromberkeley -

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    Thanks. Yeah, that's about what I was thinking unless someone here tells me that I have probably washed the lubrication out of some bearings or some such thing. For example, the cylinder walls have had any oil coating washed off by the gas- maybe spraying a little oil in prior to firing it up would be beneficial? Of course, I don't want to dismantle it if I don't have to, but I don't want to grenade- or even seriously age, the engne if I don't have to.
    #4
  5. Barman

    Barman Way Offline

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    You could pull the plugs and fog with oil the cylinders prior. Crank it over with the plugs out to let it build some oil pressure then go from there.
    I'm sure some model specific pros will jump in here with some wisdom.
    #5
  6. Martian

    Martian Long timer

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    I would pull the plugs and spin the motor, using the starter, and circulate the oil before starting it. Might want to do it outside just in case they're are fumes trapped in the engine.

    What he said!
    #6
  7. JZed

    JZed Have GS will travel.

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    Pete
    Just an idea. I always primed the oil galleries of the car engines I built.

    I wonder if it would be a good idea to drain the gas/oil, and then pull the oil pressure sensor under the left cylinder and replace it with an adapter to prime the oil gallery with some fresh oil before turning the engine over. One could use a small fuel line type hose from a oil can (hand pump kind) to the adapter and start pumping away. Pump a few oil can containers through to remove any gas/oil out and get some fresh oil to the bearings and then turn the engine over a few times by hand and pump in a couple more cans. This all might take awhile, but I think getting fresh oil in the galleries would be a good thing. The gas has a way of removing all of the lubrication out of things that might leave them unprotected on the first few revolutions under power. It might also be a good idea to drop the pan and pull the valve covers.

    I have an adapter out in the garage. Made it from a bolt from NAPA. Will dig it out after supper.

    Damn alcohol floats. Oak has a big German word for these kind of mods, "Schliemerverbesserung" which translates roughly as "Smaller Improvement" or more accurately "Bad Idea". Love that word.


    What say you inmates???

    JZed
    SC
    '86 R80
    '92 R100GS
    '06 KLR650
    #7
  8. disston

    disston ShadeTreeExpert

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    You haven't washed the oil out of any bearings but the piston on the side that had the gas go through is lacking oil. A little oil squirted into the spark plug hole and rotating engine would take care of this. Or it could be left as is. The piston doesn't need much oil I think.

    I think I would want to take off the oil pan and clean it. Then I could look inside. I think everything will be OK but this would allay those feelings of mysterious happening where I couldn't see them So I'd want to look.

    I would definitely crank this motor over with the plugs out, make sure you ground the plugs or the wires, to get all the left over gas out of the combustion chamber before firing. Liquid gas in the cylinder will cause damage, if enough.

    Charlie
    #8
  9. petefromberkeley

    petefromberkeley -

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    Thanks. This is not my everyday ride anymore, so I have plenty of time and energy to do it right. Even if it is mostly a piece of mind thing. I wouldn't mind just running it for a minute or two and then changing the oil and starting fresh.
    #9
  10. petefromberkeley

    petefromberkeley -

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    #10
  11. disston

    disston ShadeTreeExpert

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    #11
  12. red bud

    red bud alky w/motorcycle problem

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    sounds like it's now a boat anchor, out of the kindest of my heart i can be there in the morning and remove your problem for u


    :evil
    just trying to help
    #12
  13. red bud

    red bud alky w/motorcycle problem

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    these things (airheads) seem to take all kinds of abuse and keep on ticking

    good luck:D
    #13
  14. petefromberkeley

    petefromberkeley -

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    #14
  15. petefromberkeley

    petefromberkeley -

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    Well, I have determined through experientation that these bikes are pretty fire resistant :lol3
    #15
  16. supershaft

    supershaft because I can

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    I didn't read all the posts but those independent floats are junk in Bing's AND Mikuni's.

    Change your filter. Prime the the oil pump by turning your rear wheel with the plugs out. Doing it all over again in twenty miles is probably overkill but I would think about it.

    It should be all right. They usually are after such floods.
    #16
  17. _cy_

    _cy_ Long timer

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    drain oil/fuel yes, but don't start it without re-lubricating ALL bearing surfaces.
    yank plugs and squirt several oz of ATF ... that should take care of upper cylinder area.

    definitely change out oil filter, mostly to drain fuel from that area. fill with rotella or other dino, for you will be dumping soon. and refilling with fresh oil shortly.

    main danger is running your motor without any lube on bearing surfaces. gasoline will wash away oil film. crank over motor with plugs out (ground or disable) easiest way to crank motor over is with key off. if you know correct terminal on starter relay. easy as pie to crank over without ignition on.

    object is crank over motor with plugs out, until oil pressure raises enough to flood bearings with oil.
    then re-install plugs and fire up normally. odds are motor will come out with zero damage if bearings are full of new oil

    don't run motor very long with oil mixed with gasoline. I'd drain and refill with fresh oil again. consider the first oil fill a flush.

    this has happened to me on several engines, where crank case ended up full of gas. above procedures were followed with zero damage.
    #17
  18. norton73

    norton73 drinkin'

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    I think I'd consider pulling the valve covers and dribbling oil down the pushrod tubes to lube the cam followers. And/Or pull the pan and lube the cam and followers from below.
    #18
  19. bmwloco

    bmwloco Long timer

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    I have a Beast, a 1000cc BMW sitting on the lift. Oil, over weeks, pooling.

    More oil will be poured in until I can tend to it. I check the stick and add as necessary.

    Sooner or later, I will. I will ride the other two in the interim. Each more horribly abused than can be imagined, but still running strong.
    #19
  20. Wirespokes

    Wirespokes Beemerholics Anonymous

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    Nothing to worry about! As a matter of fact, the engine (especially the pan) should be spotless now. :wink:

    After changine the oil, definitely pull the plugs and by hand, crank the engine over for quite a while. Then, with the key on crank it some more, making sure the oil light is out.

    Button her up and it should be fine. The miniscule amount of fuel left in galleries will thin the oil slightly till it evaporates. Not sure I'd even worry about changing the oil a second time.

    Musta been way cool shooting flames out the side of your bike! Woulda been better out the back, though.
    #20