So, my engine was making weird sounds last night when I was about to drive home so I ended up leaving it at the University and getting a ride home(which is 20 minutes away). I have to tow it back to a garage near my house today, since we don't think its a good idea to take it on the interstate now. Obviously this is just what I want to do on Friday! If only I was sure what was wrong. I think the sheath over the fan may be loose and causing the noise (sounds like plastic hitting plastic). It first started when I turned on my AC but now happens even when the AC is off. Anyone have any idea what could be making the noise?