Boxer engine FULL of gas for 1.5 YEARS (shit)

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

  1. trophymoto

    trophymoto MACDADDY!

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    by the way it takes about 125 1/2 turns of the rear wheel ,in 5the gear to get oil out to the top of the rockers. ( I just did this the other day, and counted!?!)
    #21
  2. petefromberkeley

    petefromberkeley -

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    This is all good to hear. Not tragic then. It would have been headed to your place Billy if it was going to be a giant deal.

    Well it's been to long without the airhead so I wanted to put some miles on it. This will teach me not to ignore it so long. And loose that dumb float kit.
    #22
  3. petefromberkeley

    petefromberkeley -

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    Maybe I should find a hill.
    #23
  4. Wirespokes

    Wirespokes Beemerholics Anonymous

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    The main thing is the main bearings. Without compression (plugs out) there's no stress on them. The only area experiencing any pressure beyond that is the cam, lifters and rockers.

    After cranking by hand a while, most of the galleys will be clear to the mains, then crank with the starter to remove the rest. If it takes 125 revolutions, that would go really fast with the starter motor.
    #24
  5. jackd

    jackd Long timer

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    When I prime my oil pump & system, I just pull the plugs, put her in 5th gear and turn the back wheel. It works quite nicely. Easier on the starter as well.
    #25
  6. squish

    squish Out of the office.

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    Most likely it's ok.

    I'd pull the oil pan just to make sure you got any sludge that got washed out from somewhere else and ended up down there.

    Button everything back up, squirt some oil down each cylinder, and with the plugs still out rotate the engine using the rear wheel with the bike in 5th gear, do that for a number of rotations just to make sure there's some oil getting past the oil pump and such,

    The bike most likely suffered more damage from sitting for a year then it did from the oil.
    #26
  7. Kaigai

    Kaigai n00b

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    hi pepe here i got a R65 1983 a R90/6 1974.
    0n my boats i've had diesels and gas motors.
    im a fan of marvel mystery oil. or diesle to run on a contaminated engine. wheni screwed the pouch on from sinkings or fuel pumps gone crazy.
    so i heard pulling plugs,
    and fuel washed oil galleries.
    my take is three oil changes.
    pull plugs pour marvel oil in top end walk the poodle or in your case your bike.
    to circulate the system at low compression and speed to minimize the risk of hidden fuel egnition source.
    remember a soak past the rings and journels a few days between the flushing.
    if your done with a fush out. put it back together fire the beast up checking oil for any emusion or foaming or fuel floaing on top.
    good luck.
    Sent from my SCH-I800 using Tapatalk
    #27
  8. enfielddnepr

    enfielddnepr Been here awhile

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    In this case, would adding some 2 stroke oil to the gas(which is not gas, but benzine?) benefit?
    All over the world you read bad things about alcohol in fuel,..
    #28
  9. eepeqez

    eepeqez Long timer

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    Had the same thing happen to my R65 and was riding it around before I realised.
    It took no harm from the experience.

    Drain it, replace the oil filter, fill with appropriate oil, and if you feel nervous, pull the plugs to spin it on the starter without any load to get oil pressure.

    Yes, oil which is 60% petrol is very runny, but it still protects from corrosion and lubricates, though I wouldn't deliberately run an engine on it - unless of course it were a two stroke, and they cope fine lubricated with 50:1 fuel to oil.
    #29
  10. Packer

    Packer Been here awhile

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    You've drained the fuel contaminated oil and fitted a new filter and filled with fresh oil. Any fuel remaining within the galleries etc. will be miniscule. As said pull the plugs, squirt a little oil into the combustion chambers, 10ml or so would be plenty.

    I would then check that it's in neutral and hook up a car battery, positive directly to the starter motor feed terminal and earth to the bike engine. Make the final connection at the battery as far as possible from the bike and just spin it over for a minute with the plugs out. Repeat after a few minites to allow the starter motor to cool although even that is probably not necessary as the load on the starter will be very low compared with cranking against the compression once the plugs go back in.

    It won't need any more than that. Replacing the oil again would just be overkill. The first time the engine runs and gets up to operating temperature the fuel will all evaporate anyway. Fuel washes the bores and contaminates the oil every time the engine is started on choke so it's not going to be an issue.
    #30
  11. petefromberkeley

    petefromberkeley -

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    Thanks everyone. I feel much better.:D
    #31
  12. petefromberkeley

    petefromberkeley -

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    Yes, gasoline (benzine) not gas. That's a confusing thing we say- should probably call it petrol to avoid confusion. I agree that alcohol in fuel is a terrible idea for a number of reasons.
    #32
  13. Fudmucker

    Fudmucker ex-lurker

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    My wife's old VW Beetle had a similar problem years back.
    Parked in the sloping driveway, the float in the carb did not shut off the fuel properly and a little would run into the manifold overnight. The fuel would find its way into the cylinder, past the rings and into the crankcase.
    We only noticed this because the oil consumption stopped.
    Instead of a can every second tankful, it stayed full. :huh
    One morning we had fluid lock and it wouldn't turn over.
    We towed to the shop and they identified the problem.
    We had been running the VW motor with two stroke mix in the crankcase instead of oil ! :eek2

    The oil was changed and the filter changed.
    Then we ran the motor for 1000kms before changing oil again.

    That motor ran beautifully for another 14 years... :D
    #33