@ cello the World is a strange place BETA probably fitted them like that at the factory , the seal will work like that and probably cause no problems but the seal for the pump should really have a seal that has the open end with the expansion spring near the lip facing toward the coolant , the pressure of the coolant goes against that area thus helping it to seal more than without any pressure. If you check out the TRS trials bike it has a seal for the oil and a seal for the coolant with a gap between the two seals that is within a casing and that casing has a hole, if the pump seal fails coolant drips into the casing and out of the hole so that you will know it has failed .On the TRS the seal for the oil has the open end facing the oil and the seal on the pump has the open end facing the coolant as they should. Regards Alan.