1.5L REVOTORQ ENGINE 81 Testing Parameters Thermostat start open temperature is 86º to 90ºC at 0.1mm travel. Full open travel of 8 mm (Min.) at temperature is 100º C Leakage through main valve at room temperature and 0.3 kg/cm2 is 1500cc/min MAX. D. Water Pump The water pump is a simple centrifugal pump driven by belt. The pump circulates the engine coolant when it is driven by the engine. The water pump uses centrifugal force to send fluid to the outside while it spins, causing fluid to be drawn from the center continuously. The inlet to the pump is located near the center so that fluid returning from the radiator hits the pump vanes. The pump vanes pushes the fluid to the outside of the pump, where it can enter the engine. The fluid leaving the pump flows first through the engine block and cylinder head, then into the radiator and finally back to the pump. Water pump flow Characteristics Pump Speed in RPM Discharge in LPM Inlet Pressure in Bar 4200 120 1.2 E. Temperature Sensor A semi-conductor material changes its resistance when exposed to variable temperature source. Resistance decreases as temperature increases. Temperature sensor provides engine operating temperature input to the ECU. Corrections for injection parameters are done by the ECU based on coolant temperature to run the engine with maximum efficiency at all temperatures. F. Water Box The thermostat and temperature sensor are mounted on the water box. The water box is mounted on side of cylinder head. It’s a supportive component to the temperature sensor
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