Freshman Rider
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Joined: Mar 3, 2013 18:40:24 GMT -5
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Post by nate7504 on Mar 14, 2013 22:15:45 GMT -5
When I ride my scooter for a bit then stop it and check the oil,I can look down the oil fill hole and watch the oil level go up and down,it will drop to the low mark then rise up as high as the top full mark,so I popped off the hose on the valve cover vent that goes to the air box and it rose up and stayed there,then I plugged the vent with my finger and it dropped back down ( the oil) what is going on?the vent hose goes into some elbo thing to some vent on the cvt cover then up to the air box,where is the best way to vent the valve cover?cani just bypass the other crap and run it right up somewhere under the seat? I have an oil leak to at wot I think something is not venting correctly
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Post by oldchopperguy on Mar 16, 2013 12:11:56 GMT -5
Well Nate 7504,
My Xingyue Eagle 150 has been doing this for five years now... LOL! Really... After riding, it always gets parked in the exact same place and sometimes (I always check the oil level before starting) the level will be well over the full mark, sometimes right on the mark, and sometimes below the full mark.
I have NO IDEA what causes this... I just chalk it up to one of those unexplainable Chinese phenomenons that plague these scooters. Mine has been doing it for many seasons, so I wouldn't worry too much. If it ever shows too low (near the bottom of the "safe" area) I put a little in.
I wonder if Vespas and Hondas do this? ...LOL!
Enjoy the ride,
Leo in Texas
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Sophomore Rider
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Post by payneib on Mar 16, 2013 12:21:29 GMT -5
Sounds like crankcase pressure issues. Your breather may be slightly blocked, or just generally struggling with pressure changes with temperature changes as you engine cools down/warms up.
You only really need to worry if its full on blowing the oil out of the dip tube, as your piston rings may be on the way out, causing pressure from combustion gases to leak in to your sump.
To give you some idea of how bad that can be on an engine, the diesel generators I used to work on while in the Navy had blast doors on the crank case to safely release pressure before the engine exploded.
Ian
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