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Oil draining

Home Forums TR3OC Members Forum Oil draining

This topic contains 9 replies, has 3 voices, and was last updated by timothy rendall timothy rendall 4 months, 3 weeks ago.

  • Author
    Posts
  • #8855
    peter waugh
    peter waugh
    Participant

    Hi. My t150 wet dumps when left for two weeks. About a litre of oil drains into the crank cases.  Is this normal or is there a non return valve similar to the TR250W.

    Also when in use say on a 200 km ride the oil seems to drop about half way down the dip stick.  The missing oil is in the crank cases.  I am running 3.4 litres of oil in the tank.   The oil is still in the system but not being scavenged back to the tank.  Is this normal.  Bike runs very well does not get hot nor smoke from exhaust.  Bike is original with 13,000 miles on it. Any clues or cures would be welcome. Cheers Peter.

  • #8858

    David Lord
    Participant

    No it’s  not normal.  Have you checked that the sump plate is round the right way?

    • #8862
      peter waugh
      peter waugh
      Participant

      Thanks David, yes sump plate is on the correct way.

  • #8859
    timothy rendall
    timothy rendall
    Participant

    There is a non return valve, it’s just a ballbearing and a spring, and it will let by after a few days.

    Sounds like a scavenging problem. If the oil is still in the bike and not being burnt off. i’d want look at the pump.

    After a 200km run are you draining the oil from the sump to check?

    If you put your finger inside one of the exhaust pipe ends does it gat covered in oil ?

     

  • #8863
    peter waugh
    peter waugh
    Participant

    Thanks Timothy. the leak into the sump is very slow. about a litre over 3 weeks of non use. The oil that disappears during a run is the same amount I get from draining the sump. So for example, before a days run I will drain the sump into a clean container, replace that into the oil tank, which brings the level back to the correct level.  After the ride, say approx. 200 km, I check the oil tank and the level is half way between max and min lines on dip stick. I then drain the sump and the level returns to max.  No oil in pipes, just dry soot.  Possibly it is the scavenge side a bit tired, how long would you expect an early model 1969 T150 oil pump to last? Are the later pumps better? Bike has 13,000 miles showing and cycle parts seem to match to those sort of miles. Cheers Peter.

  • #8870
    timothy rendall
    timothy rendall
    Participant

    Ah now all is a little bit clearer: there is supposed to be some oil in the sump. all the time. If i don’t use my bike for 3 weeks or so then i will have about 1/2  pint from the oil tank drained into the sump. i usually just start the engine and it will return to the tank. My 1968 T150t still has it’s pump and it’s working fine. I would think that the oil in you sump after a ride is the normal amount and you may need to top up your oil tank .

    If you drain the sump and start the engine let it warm up for a while and then recheck the oil tank level. if it’s gone down with out the 200km miles then you just have to top up the tank as the oil has found it’s right level in the sump

     

    • #8871
      timothy rendall
      timothy rendall
      Participant

      You’re also lucky that your engine is not burning oil, mine has only just gone over 10K miles and has been burning oil from the l/h cylinder since before i got it. My bike is a one owner bike with confirmed milage, mind you i don’t think the last owner looked after it all that well !

      • #8872
        peter waugh
        peter waugh
        Participant

        Thanks Timothy, you have helped greatly, I was thinking perhaps I needed to add about 500mls to the tank.  I will do this and check and see how she behaves. Cheers Peter.

      • #8922
        peter waugh
        peter waugh
        Participant

        Thanks David and Timothy, the problem was not enough oil in the tank, about 400ml. The oil does still drain into the sump slowly over a month of non use, but only about 500ml. When the engine is run and stopped the oil level in the tank returns to the full mark. Thanks for your advice, Ride On.

  • #8924
    timothy rendall
    timothy rendall
    Participant

    Thank you for your thanks 🙂 i’m glad we could help . It’s what being in the club is all about.

     

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