Air blowing from oil fill hole

[3puttpar]

I just checked the oil on my 08 Linhai Aeolus 260. With the engine running, I removed the plug and and got blasted by bursts of air and oil mist. I shut off the engine and waited a minute, then checked the oil level. It's right on the money. The scoot seems to be running just fine.

I did some searches on this forum, and the only mention of air blowing from the fill hole referenced a twist in the crankcase vent hose. That will be the first place I check, but are there any other known causes of something like this?

I just did a major PDI-like workover last weekend (at about 900 miles--I bought it used), and it's possible I left that vent obstructed in some way.

Thanks everybody!

--Ron

[inkyben]

its common to have oil come up out of the fill hole if the cap is off when the engine is running. I have a straight tube without any obstruction from my valve cover and I get splatters aswell if the cap is off. If anything its a sign of good compression hehe.

[3puttpar]

Thanks Ben. If I'd have noticed it doing that right out of the gate, I wouldn't have thought twice about it. But yes... compression for sure.

[wile]

HAHAHA, yep it happenes to the best of us. I changed the oil and got distracted and I then took the CVT cover off and changed my weights put the belt back on and variator and then started it to check the cvt. Well I heard this whoosh sound and oil was flying out 8 feet in the air got it all over my tool bench and tools and garage floor what a mess(HAHA).
Wile

[3puttpar]

I'm just happy I don't have to take this thing apart again. The hose, filter, and spark plug replacement, the valve adjustment, electrical inspection, fluid flushing, etc. were relatively easy. Body panel strip-down and reassembly was tedious. Removing and reattaching the seat was a nightmare.