NEAL is right on the money. Only one other thing that usually ruins an otherwise good repair. DO NOT scratch, dent, or sand, the crankshaft seal surface. Be extremely careful when you reinstall the seal over the crank. I have seen dealers change the seals and use a screwdriver to remove the seal or pry the seal in place, scratch the crank and end up installing a crank seal sleeve on the crank to stop the leaking. They make a seal installation tool that you may find at the Auto Parts store that they will let you use. Good luck.