Just an FYI, just because it drips from near the crank sprocket doesn't mean it is the crank seal leaking. It could also be the valve cover, the cam seal, the intermediate shaft seal, the intermediate shaft seal carrier o-ring or the oil galley plug next to the intermediate shaft seal carrier. You might want to pull the timing cover and track upwards to see where the leak starts. Crank seal is the hardest of all to change.