Summary: If you need to replace the tank bolts in your toilet because of a rusty bolt or corroded washer, learn how in this free online home improvement and DIY home repair video.
"If you determine that you need to replace your tank bolts because of a rusty bolt, or, which is more often the case, a corroded washer, it’s fairly simple to do. You definitely need to drain the tank, get all the water out of it. and then look down in here - you’ll see the head of the bolt, that’s actually the screws here, the slotted top. And you’re going to want to hold it still with a screwdriver or another flat item while underneath you loosen the bolts with your socket wrench.
So really, you’ll simply just reach under - or you may need someone to help you but, it’s simply a matter of holding the head still while you ratchet out the bolts from the bottom. And once you’ve done that, the tank lifts right off there - it’s not that heavy when it’s empty, and you’ll just do everything in reverse. I would recommend taking the bolts with you to the home center so you make sure you have the right size. But that will take care of your problem. "
eHow Article: Replacing the Tank Bolts on a Toilet