More than likely the rubber bushing has deteriorated and more or less welded itself to the bolts. Use some good penetrating spry to start. If that doesn't work use some acetone (nail polish remover). Be careful as this is flammable stuff and don't get it on anything else. Try to get it in the bolt hole as much as possible, maybe working a small screw driver in at the same time. Use some old gloves too to keep the rubber off of your hands. Put some paper towel or a rag underneath. Let the acetone eat away at the rubber, you should be able to get the bolt out. You'll then need to use some more acetone to clean up the bolt. Wear some goggles so as not to get anything in your eyes. Rubbing alcohol will also work and not as dangerous, but will take much longer. Use some WD-40 on the bolts when you insert them into the new bushings. Rod
