[JoeShmoe]

Sounds like your motor mounts are broken. I think that means that the actual part that holds your engine in place is not solid. If it is loose your bands and pulleys will not be lined up and will eventually fall off or snap. Same when turning, if your engine is thrashing around it rubs against other components causing the noise. The fan is usuallt cinnected to the engine via the belt so if the engine turns of the fan should turn off as well; but is it is not that means that it isn't secured properly by the belt.