Smoke...
I am getting ready to start mine this weekend, hopefully I don't have the same problem as the 02 seals I removed were perfect since they were part of the seat and couldn't come off the valve guide.
I had this problem with aftermarket seals on a Nissan I rebuilt several years ago, I even replaced them with another set of aftermarket seals. They kept riding up the valve guides and then coming free allowing oil to pour into the cylinder through the guide. Then I got the real deal Nissan seals and they never came off of the valve guides and solved the problem.

