There's a bunch of different ways to do this.. 1. Go get the special crankshaft tool. (about 80 bucks from Moroso). 2. Get a big ass strap wrench and hold the harmonic balancer. 3. Pull the oil pan and baffles, and wedge a two-by-four in between the block and the counterweights on the crankshaft. The wood will break long before the metal shifts. 4. If its a standard, put the car in fifth gear on the ground, turn your tires all the way to the left, have someone mash the brakes like a mofo. A big breaker bar (1/2" drive recommended) and about two-three feet of extensions, and it'll pop right off. I weigh about 120, and thats how I end up doing 99% of the time. Its only 140ft/lbs of torque. When you get it off, be sure to chase the threads, so you clean any corrosion that might have snuck in there.