I have a 1992 ford tempo Gl and a couple of weeks ago i was driving when my car started to make a loud knocking noise and started to smoke, and then it stalled out but after I let it sit for a while it would start back up for a couple of miles but then it would overheat and stop again. I was told by a friend of mine that it could possibly my water pump or a head do u have any idea what might be the problem?