I did the drivers side upper hinge on mine a few weeks ago. A helper would make it easier. I removed the hinge frome the car, supported door with floor jack with carpet on it as not to scratch door. Also might want to put masking tape on the edge of the fender and door so you don't chip the paint like I did. I had to losen the lower hinge to get the upper out. Clamp in a vice to remove the spring, use a spring compressor if you have access or a couple screw drivers. Put a piece of mechanics wire throough the spring wear a face shield and gloves for protection. The gloves come in handy for holding the spring back with one hand while prying on the spring with the other. Cut the tapered end off the pin and slide out. Watch how the hinge goes together. Depending how worn it is, you may have to drill the holes to fit the bushings, You want them to be kind of a press fit. I ended up drilling all 4 hinge holes because they were all worn and used all 4 bushings. Put the pin in, I put a spot weld on the tapered part of the pin that sticks above the hing so it can't slide out, remember it goes in from the bottom. Also make sure you have the spring mount(the part that slides across the the roller and keeps the door from opening to far) in the correct positon. Put the spring back in, this is the fun part unless you have a spring compressor. You will have to readjust the door and the door striker. I still have to do my passenger door. Good luck.
Eric