there is only one seal for the crank at the front which is pressed into the front cover.there is a sump seal also on the cover and a gasket which also takes in the aux shaft cover.
what you need to do is remove the front crank pully and pry out the old seal which is tricky enough, taking care not to damage the aluminium cover.and then tap in a new seal,taking care no to damage the inner knife edge of the seal when pushing it up on to the crank journal,