Pull off the belts, remove the crank pulley, pry out the seal with a screwdriver, clean up the oil around the area, tap on the seal evenly and flush with the cover. Done. Good time to replace belts if you need them. The crank pulley might be kinda tough to get off. Sometimes your lucky and it slides right off, but you may need to use 2 prybars or screwdrivers on each side of the crank pulley and try to slide it off evenly. Be careful of the half moon keyway on the crank. It can fall off and your almost guaranteed to lose it.