I did this once. After removing the lower oil pan, I also used a socket. When it didn't easily tap out, I got a jack and pushed up on the socket. I happened to have the engine mounts off since I was replacing them. I literally lifted up the engine by just the socket pushing on the hardened rubber grommet. (At last, I found a substance harder than diamond) I ended up picking out the rubber grommet with a sharp awl and hammer.