How to remove the crankcase pully and procedure for aligning timing marks thanks on 2003 Subaru Forester

car stopped would not start tried to start several times. Removed the drivers side cover for timing belt found teeth from pully sheared off. How can a interferance and non interference engine be identified?

Asked by for the 2003 Subaru Forester
we use a breaker bar and socket and lock the flywheel from the rear and break it loose.
subaru is a non interference motor or a free wheeler.