Ok, coming back from NYC the other week one of my plug wires gave up on me and I drove home on three cylenders. Half way home a tapping noise started that sounds kind of like a fan, when the RPM's go up it sounds louder and faster. So I changed my spark plug wires, distro cap, ignition rotor and changed my oil (didnt see any metal particles in the oil). So I brought my car to a local mechanic and he said that most likley the valve needs to be re-adjusted. So I took it to my freinds mechanic for a second opinion and he said that something was wrong with my crank and that it would be cheaper if I just replaced my motor instead of fixing this one. So if anyone has any info it would be great. Any suggestions would be great too.