Hi,
I don't know anything about the Forenza but I do know that the Esteem (1995 - 2002) has problems with the front CV-Joints going bad after 70k miles which causes it to make clicking and clunking noises when going around sharp corners.
I doubt it is the engine itself after six months of clunking and clanging it should have destroyed itself.
When do you get the noise, starting, stopping, turning, hard braking?