Wet sumping while changing pistons

Discussion in 'Other Service and Maintenance' started by meldrew, Oct 30, 2011.

  1. meldrew

    meldrew New Member

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    Just converting my 02 Evo 883 Sportster to 1200cc and noticed when fitting pistons the crankcase was full of oil, drained down from tank over a four week period the cylinders have been off. :(

    Its never done this before even though it has stood for several weeks between use, could stripping the top end cause this to happen? and is there a crankcase drain plug I can empty the oil from to prevent oil and smoke blowing out of every orifice when the engine starts.
     
  2. glider

    glider Veteran Member

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    Sportsters and softails are known for doing this when they sit for prolonged periods because of the location of the oil tank being higher than the sump.
     
  3. Breeze3at

    Breeze3at Well-Known Member

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    Use a turkey baster and piece of hose to suck the oil out of the crankcase. I'd drain the oil tank to prevent any more oil sumping. I always attach a "no oil" tag to my key or starter button if I leave the tank empty so I don't fire it up. When it's back together, fill with oil and enjoy the bigger engine. :)
     
  4. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

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    A large syringe with some window washer hose on it will also work as a fair method of extracting the excess oil and as Breeze3at said drain oil tank till job completed

    Brian
     
  5. meldrew

    meldrew New Member

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    Unfortunately I finshed rebuilding the engine before it dawned on me what had happened, checked the oil tank, empty.
    Can I take out spark plugs and spin the engine on starter to pump oil back to tank?
    OPr is there a better way?
     
  6. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

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    That should pump some oil back into the oil tank whether there will be enough power in the battery to turn over the engine enough to get all the oil back i wouldn't be sure
    However if going this route ensure the plugs are fitted to the ht leads and grounded otherwise the electronics of the ignition system may not be too happy

    Brian
     
  7. Jack Klarich

    Jack Klarich Expert Member

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    :D This would be the correct way to do it:D
     
  8. meldrew

    meldrew New Member

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    It worked, I took out the plugs and grounded them so they could spark away,
    and I hooked a 16amp battery charger on to the battery. :s

    I then spun the engine on the starter in 30 second bursts, every 5 minutes, and after 10 bursts the oil tank was just over half full. :laugh

    Tomorrow I will carry on till tank is 3/4 full, and then bite the bullet and pop the plugs in and start her up, quite an exciting moment as first start on the converted engine. :bigsmiley11:

    If all is well I will need to take it easy for the first 500 miles I guess.
     
  9. glider

    glider Veteran Member

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  10. meldrew

    meldrew New Member

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    Thanks all, engine started no smoke or oil, running sweetly, timing and carburation seem ok, only done 20 miles taking it easy but what an improvement in pulling power, its a different bike, well worth the cost. Now what can I do next?