Phedra water loss

Hi people, have since about 4 weeks also run a lancia 126000km and namely the phedra 2,2 jtd. beautiful car as always at lancia. only I have a problem. as soon as I drive autobahn, he pushes out water or loses water. in the stand is nothing to see. have brought the car to fiat, have changed a hose and were the opinion nu everything is good. in the city and on land road everything was also good, only on the highway stop not, again water loss. again workshop (fiat) after a week I picked up the car, they have allegedly found nothing more, it came the message of those, the engine has to be pulled out and pulled off. I have to say, no water in the oil, no qualms, no jerking or bad start. well, ixh took the car stop again. I brought the new cooler sealant and made it in. then drove around, but as soon as I drive around 120 kmh or more he pushes out water. so, since now this ze ug (brown water) is in it, I can now finally see where the water came out. he pushes the water out of the supply tank somewhere. strange is, with fiat it doesn’t stand out. now to ask, someone has had that, could that only be the cover or is there something about the head seal ? again, so on normal ride nothing happens, also he does not get hot, always stays around 90 degrees, even if water is missing. by the way, with the radio I also have problem, well, vi, cd everything works, only he doesn’t find any transmitters, just rush. gr. blues