if you have a contour you dont have an expansion valve... i dont think any fords use expansion valves anymore.. that give the refrigerant to cool in a car is the orifice... and its inside the liquid like going from the compressor to the evaporator coil.. whoever told you that then dont take anymore advise from them... what they might have said is when you change a compressor you always change the filter dryer(to make sure you dont damage the new compressors.. mater of fact most compressor manufactures require you to chang the filter dryer to keep the warranty on the compressor.......
