Crank Seal Is Still Leaking How Do I fix it ??

I have a 1990 Mitsubishi Mighty Max, 3.0 V6. I have an oil leak at the front crank pulley. I have replaced the crank seal and still have a leak after the motor warms up. Do you have any ideas of the problem I am facing.

What you will need is a speedy sleeve. When the crank seal wears a groove in the crank you need to install a speedy sleeve on teh crank so the new seal has a new un-grooved surface to seal itself against. You should be able to purchase one at your local auto parts distributor.