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in the past couple of days my temp gauge has been reading alittler hotter then usual, and when I put it in neutral and coast ( as if coming to a light ) the temp needle starts to climp rapidly. is this my thermostat or my water pump? the engine even feels hotter to the touch, and my radiator fan stays on pretty much all the time, even after driving if i leave the key in the radiator fan will run for about 10 min to try and cool it down, my engine has never run this hot, and yes i checked my fluids. any help would be great.

-Todd