I just read an article in popular mechanic that there is a valve in the fan clutch can be stuck either open or close, or opens fast etc. If it opens fast, the clutch will grip faster than normal and will be like this for longer time. They said that due to defective bimetal element (or could be dirt, or sluggish mechanism, I guess). The point here is the power that i lose due to this. Besides the danger of overloading the water pump and the fan etc. And ofcourse, less mileage.
what to do now?