Anybody have any experience with their LT500 pushing oil out the cranckase vent/tube? Mine has been doing it at high rpm. Oil level was not overfull, first thought was crankseal positively pressurising the crankcase, second was oil foaming even though there should be no reason for this.

 

Pressure test the motor. Go to Duncan Racing's web site for directions on how to build and use your own engine pressure tester (I did and it was very easy).

 

Mine did this tonite also at high RPM i know that my power valve is leakin not a real big deal i read some wheres, but i see the oil comin out tonite i think its best to get it fixed. But i'll leak down test it again an if i find some new news then i'll post it for ya's.

Jay

 

take a look at your power valve o-rings, or just replace them. If they are leaking it will pressurise the tranny, thus blowing out the vent.

just read that on duncan's web site, in the how to do a leakdown test. Kinda sounded like your symptoms.