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settles into a shallow rise and fall signal, close to a straight line. This indicates that the thermostat is functioning correctly. NOTE: Some thermostats indicate the temperature(s) in Celsius and Fahrenheit. The graphic below shows the location and an example of the opening temperature (88ºC) The graphic below shows an alternative method used to show the opening temperature
Description Opening temperature Fully open temperature NOTE: Generally, most thermostats maintain a coolant temperature between 88ºC The engine should start cleanly and the ECT value will rise quite quickly with smooth The temperature should rise to approximately 90ºC for a thermostat that has an 88ºC If the ECT value fails to maintain a constant value and falls back to lower figures, typically 5. 5. INSTALL a new thermostat. REFER to: Thermostat - 2.0L Duratec-HE (107kW/145PS) - MI4/2.0L Duratec-HE Flex Fuel (107kW/145PS) - MI4 (303-03A Engine Cooling - 2.0L Duratec-HE (107kW/145PS) - MI4/2.0L Duratec-HE Flex Fuel (107kW/145PS) - MI4/2.3L 6. 6. Carry out another road test from step 1 using the same criteria to confirm that the concern has been rectified. 7. 7. Using the Ford approved diagnostic tool, clear the PCM keep alive memory (KAM) Item A B
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