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View Full Version : Oil in air box from valve cover vent



Iliketogofast
04-07-2009, 02:11 PM
The Z400 started smoking today, checked the airbox and there is oil in there coming from the valve cover vent hose.

I took the valve cover off to check for messed up valves or anything out of the ordinary, the only thing is that when you turn the engine over a mist of oil comes from the spark plug hole. I am thinking bad rings or cracked piston but I don't have time to take it apart until I get back from work so I am looking for some suggestions until then.

I don't know much about four strokes so any help is appreciated. Thanks!

DVXchic
04-07-2009, 10:49 PM
funny, sounds like the same thing mine has done. shops to busy to take it apart yet. hopefully niether one of them are too bad.

Drewltr450
04-11-2009, 06:26 PM
yea replace piston rings and top end gaskets and you will be back up and running