8 3/4 spitting gear oil out of breather vent

I probably pitched it. I had the same problem as the OP. Got mad and tore it apart, oh, it wasn't an orginal, it was a replacement. Got the cap off and there was a very light spring with a rubber washer in there. I agree about not wanting pressure, it's a vent. I have a new vent from Jamie at Mega Parts, I just haven't gotten around to installing it.