Hello, I have an audi80 B3, 3A,(113 hp) 2.0L. The following: I constantly notice that cooling water is missing in the balance tank.Although the cylinder head seal was renewed about 20 000 km ago and although no traces of water are visible on the engine block and hoses (cooler both oil cooler and water cooler NEW) (I have searched the engine thoroughly).I don’t know what this could be, maybe someone has similar experiences, if please tell me what that could be and if the e I would like to thank you very much.