[oil in the air box] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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oil in the air box
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Posted by: denandreb

I am getting oil in my airbox, the quad seems to be running fine, but I am getting oil in the air box. I checked to make sure that I didn't have to much oil in my oversize oil container. It was actually just barely on the dipstick. I would appreciate any help in figuring out what it is.

Posted by: drew416ex

sounds like somehow its beeing blown through the crank case vent hose into the airbox. I dont know how, but I dont see it getting in there any other way.

Posted by: denandreb

any suggestions on how to check to see if it. Know what could be causing it.

Posted by: dariusld

Could it be from the air filter?

Posted by: drew416ex

Look at the white thing that attatches to the intake tube. Is there any oil in that?

Posted by: denandreb

what does that mean if there is?

Posted by: drew416ex

that would mean the oil is getting into the airbox through there. I dont know why or how, but thats what that would mean

Posted by: boosted3g

That is there for a couple reasons. Emissions and crankcase ventilation mostly. Emissions in that any unburnt gasses will enter the engine again to be burned and for ventilation it has to breathe somehow. If there was no vent it would get hot, condensate and you would have water in your oil. Oil vapor will get pulled through this system also and collect in the intake.

Posted by: drew416ex

I understand maybe some oilvapor, but he is saying there is quit a bit of oil in there. Mine has never even had a drop in the airbox.

Posted by: denandreb

yes, I do get quite a bit, it was actually enough that it was dripping out of the airbox. It may have actually gone through about a quart of oil in the last two or three times that we have been riding.

Posted by: boosted3g

If your getting huge amounts of oil it usually leads to ring seal or too much oil but you have already checked that. Id do a compression check and a leakdown. I dont want to worry you but thats a good place to start.