Liquid leaked (???) on the lower engine cover.

Hello omega fans, I hope you can help me with my problem described below. In the area of the crankshaft belt disc and the oil filter, I have been observing an oily, honey-colored liquid that is thrown through the running engine onto the engine cover below. This leak is only noticeable at a higher engine temperature and it is not as if this leak would persist constantly. It is always a certain “quantity” that is visible on the cover after I had wiped it away before. By the hand of a post I read here about the same characteristics as my omi, I had expanded the coolant flange and reassembled it with new seal – without success, it was all as before…!! I can’t imagine that this is supposed to be a leak in the cooling circuit, because the coolant liquid is greenish and the liquid on the M. cover is as described above “honey-colored”…. Thank you very much in advance for your answers…and in advance of all the happy greetings of the omega fans.