i tried googling it, but only found threads that linked the word paperclip n radiator..

anyways my motor is running fine, but last month the fan worked..now it's not turning on, on its own..
could you guys explain to me how to use the paperclip technique and what exactly does it check/tell me..

and also my upperhose (which i bought from autozone..) leaks a tiny bit, would this effect the cooling drastically at all? i'm planning to change my cooling system out anyways this summer with some samco/jhp hoses/ dual core radiator.

thanks ht.