Help noises while steering

Hello, Subject Opel Omega B Caravan OMVL LPG 2,0 16V Bj 1998 In the morning everything is in the morning after about 10min the steering starts to crunch so as soon as it gets warm, the same as if rubber rubs together so it sounds like already with the smallest steering movement oil in i.o flat belts has been replaced Coupling rods also i.o What could it be his steering gear?