This question already has an answer here:
Please excuse me if some of my terminology is off. I don't know much about bikes. When I came home from college I noticed that the seat of my bike was way to high and the headset was really low, I have a old style quil stem head set,. So I decided to raise the headset. When I raised the headset I did not know that I was not supposed to completely remove the headset stem bolt. I tried screwing it back in but it doesn't work. So now the headset does not control the front wheel, and I have no idea how to fix it. Can someone PLEASE help me!!! I also have a question, why is it that when I hit the bicycle stem bolt with a hammer it fixes it but only for a short time period?