driving to a friends house get there get out to open the gate get back in a my car starts to over heat so i pull in shut it off pop the hood and see that my top rad hose is swollen/hot and my bottom hose is cold wtf..the thermostat that i have in there is a month old OEM from nissan, so i pull it out to see that there was a piece of rust stuck in the springs for it not letting it open.so just to see i boiled some water and dropped it in it opened nice.so tomorrow put it back in a drive around and hope it doesnt do it again.