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The upper Honda S2000 radiator hose fails more often than any other hose, followed by the Honda S2000 water pump bypass hose and the outlet heater hose from the engine to the heater core.
The Honda S2000 thermal radiator fan switch is usually located in the radiator or the engine block and has 2 or 3 wires coming from the unit. The 3 wire switch has a dual sensor for dual speed radiator fans. The Honda S2000 thermo fan switches come in the factory temperature settings and also come in cooler thermostatic settings so the fan will come on at a lower coolant temp.
Keep your Honda cooling system operating at the optimum temperature with a new S2000 thermostat assembly from DriveWire. Get a new Thermostat to make your Honda S2000 engine run cooler.