Yep, what eddy said, or the little gasket behind the RAVE is torn and needs to be replaced. That's what happened to mine.
Doubtful it is rings. Some carbon builds up on the RAVE slides that go into the cylinders, and this carbon then washes into the hole for the pressure to the RAVE, from here it leaks down into a little cavity under the RAVE and then weeps out the hole at the bottom. Take the RAVE off and have a look, could be a torn or leaking bellows that didn't get sealed perfectly on the rebuild (if they did them then).
Hope that helps,
NSC