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Engine coolant temperature (ECT) sender unit
All Vehicles
WARNING:Never remove the coolant expansion tank cap under any circumstances while the engine is operating. Failure to follow this instruction may result in personal injury, damage to the cooling system or damage to the engine.
WARNING:To avoid having scalding hot water or steam blow out of the cooling system, use extreme care when removing the coolant expansion tank cap from a hot cooling system. Wait until the engine has cooled and then wrap a thick cloth around the coolant expansion tank cap and turn it slowly until the pressure begins to release. Step back while the pressure is fully released from the cooling system. Failure to follow this instruction may result in personal injury.
WARNING:Disconnect the battery when working in the vicinity of the cooling fan. The cooling fan is controlled by the engine management system and an increase in engine coolant temperature may cause it to operate even with the ignition in the OFF position. Failure to follow this instruction may result in personal injury.
WARNING:Do not operate the engine with the hood open until the cooling fan has been examined for damage. Failure to follow this instruction may result in personal injury.
CAUTION:When draining the coolant or changing any cooling system components, it is imperative that no engine coolant comes into contact with the timing belt or accessory drive belt. If necessary, the drive belt(s) should be removed as contamination may result in their failure.
NOTE:The cooling system must be maintained with the correct concentration and specification of engine coolant to prevent corrosion damage.
NOTE:Providing that the engine coolant has not been contaminated with other fluids or foreign matter, its robust corrosion resistance properties allow it to be reused after changing any cooling system components, although the concentration should always be checked and maintained within specification.
Engine coolant concentration should be checked through the neck of the coolant expansion tank with a hydrometer. The acceptable range of specific gravity (sg) of correctly balanced fluids is between 1.06 and 1.07 kg/l, which represents an engine coolant concentration of between 28% and 32%. If the concentration falls below 28% there is insufficient low temperature protection and the corrosion resistance will be inadequate. In such cases the concentration must be brought back to specification.
A blue colored Motorcraft Super Plus 2000 engine antifreeze is used. This is an ethylene glycol antifreeze and should not be mixed with other antifreeze types. For cooling system top up, only use antifreeze which meets specification ESD-M97B49-A, (Motorcraft Super Plus 2000).
Engine coolant should be changed after a period of 10 years or 240,000 km (150,000 miles), whichever occurs sooner. Refill with antifreeze which meets specification ESD-M97B49-A, (Motorcraft Super Plus 2000) mixed to the correct concentration.
Radiator
The radiator is of the tube and louvered fin core-type with the tubes arranged horizontally for crossflow of the coolant. Two tanks, one on each side of the radiator, provide uniform distribution of the coolant to the crossflow tubes.
Water Pump
The water pump is belt driven from the crankshaft.
Thermostat
The thermostat is of the wax type. It allows rapid engine warm up by restricting engine coolant flow to the cylinder block, cylinder head and heater system at lower operating temperatures. It also assists in maintaining engine operating temperatures between pre-determined limits.
Coolant Expansion Tank
The coolant expansion tank is fitted with a pressure cap. It helps to maintain the correct level of coolant in the cooling system, separating trapped air and replenishing the cooling system with coolant through a hose. It also serves as a location for service filling, cooling system pressurization, coolant expansion during warm-up and air separation during operation. It is designed to have approximately 0.5 to 1 liter of air when cold to allow for coolant expansion.
Cooling Fan
The cooling fan is electrically operated and consists of a fan and motor mounted within a shroud, behind the radiator.
All except vehicles 1.3L Endura E engine
Engine Coolant Temperature (ECT) Sender Unit
The ECT sender unit measures engine coolant temperature and controls the position of the temperature gauge pointer.
