The crank pulley bolt should be hella tight, which makes it difficult to remove if you have an automatic (no way of locking the engine). The traditional way of removing is a rattle gun (but you probably have to remove the radiator to get one in there), or putting a wrench on the nut and cranking the starter.
Neither method is any help when reinstalling the bolt though: it needs to be torqued correctly, too loose and it'll wreck the keyway, too tight and it you risk stripping the threads or shearing the bolt.
Here's a safer, more reliable way to do it.
Remove the inspection cover on the lower bellhousing:
Undo these two bolts and the two on the other side. Easy access if you approach it from behind the front wheels.
Use an allen key in the ring gear teeth, the angles are just right to mesh with the teeth and it'll lock itself in the angle between the bellhousing and... you know what, I have a photo around here somewhere...
You'll likely need a puller to extract the pulley. Don't use a 3-jaw puller as it's a 2-piece pulley, the outer belt groove/weight section is only attached to the centre with rubber, and a 3-jaw puller can tear the rubber. Instead use the threaded holes in the centre of the pulley, a metal plate over the top, and the crank nut itself as a puller: unwind crank nut, pulley comes off.
Neither method is any help when reinstalling the bolt though: it needs to be torqued correctly, too loose and it'll wreck the keyway, too tight and it you risk stripping the threads or shearing the bolt.
Here's a safer, more reliable way to do it.
Remove the inspection cover on the lower bellhousing:
Undo these two bolts and the two on the other side. Easy access if you approach it from behind the front wheels.
Use an allen key in the ring gear teeth, the angles are just right to mesh with the teeth and it'll lock itself in the angle between the bellhousing and... you know what, I have a photo around here somewhere...
You'll likely need a puller to extract the pulley. Don't use a 3-jaw puller as it's a 2-piece pulley, the outer belt groove/weight section is only attached to the centre with rubber, and a 3-jaw puller can tear the rubber. Instead use the threaded holes in the centre of the pulley, a metal plate over the top, and the crank nut itself as a puller: unwind crank nut, pulley comes off.