We have a new 2010 Ranger Crew that over heats with out really doing much. It will heat up after about 10-15 minutes and start blowing coolant. The easy fix was to install an aftermarket fan overide switch that we leave running when ever the beast is on. With the fan running wide open it has yet to overheat. I also put a temp guage on it so that I can see what it is doing. When it gets between 180-200 degrees it starts to smell like coolant. Flip the switch and it goes right back to 150 degrees. It is stock. On a side note I noticed the restrictor plate on the intake and yanked it out over the weekend. Wow! It really woke up the power. O0 I was all over the Rhinos in the dunes fully loaded with a family of 5! It didn't help my cooling issue though.