Oil Pushing into the Primary

[rothladoad]

No doubt the oil is migrating through the crank seal! My thought was maybe
the breather gear isn't evacuating the crankcase properly causing a buildup
of pressure. I've never owned an Evo though, so I'm probably way off base.

 

[toma3729]

No doubt the oil is migrating through the crank seal! My thought was maybe
the breather gear isn't evacuating the crankcase properly causing a buildup
of pressure. I've never owned an Evo though, so I'm probably way off base.

This is a T.P. 113" motor

 

[Jack Klarich]

No doubt the oil is migrating through the crank seal! My thought was maybe
the breather gear isn't evacuating the crankcase properly causing a buildup
of pressure. I've never owned an Evo though, so I'm probably way off base.

No that could happen with an improperly timed or too large of a window in the breather gear, tho the crank case seal would surely blow from too much pressure, take off the cone and check or replace and shim the breather