Can someone explain to me how a b-series cooling system works? Most thermostats are on the upper radiator hose, but on hondas they're on the bottom hose. I dont get how it works...I put a new thermostat, thermostat housing and coolant temperature switch (because it didnt have one) in and my car is overheating. My fan never comes on and im not sure if the thermostat is even opening. My buddy with a GSR is having the same problem. If anyone knows anything let me know.