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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 (303-03D Engine Cooling - 1.8L Duratorq-TDCi (74kW/100PS) - Lynx/1.8L Duratorq-TDCi (92kW/125PS) - Lynx, Removal and 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) or electrically erasable programmable read only memory (EEPROM) so that new Item A B
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