that it can engage into a corresponding recess 14 on the piston 1 cf fig2 of course it is also conceivable to produce the cooling duct cover 3 according to the invention separately and to market it separately so that in this application protection is also claimed solely for such a cooling duct cover 3 looking at fig3 it can be seen that the internal combustion engine 15 has at least one coolant nozzle 16 for injecting coolant into the piston 1 wherein this coolant nozzle 16 in the case which is drawn is aligned obliquely to the piston axis 17 the guide element 6 is constructed here such that it catches the coolant injected by the coolant nozzle 16 both in the upper dead centre which in the present case corresponds to the coolant jet 7 and also in the lower dead centre of the piston 1 which in the present case corresponds to the coolant jet 7 u2032 and deflects it into the cooling duct 2 of course all coolant jets lying between the upper dead centre and the lower dead centre and not drawn in further detail are caught and can be deflected by the guide element 6 the coolant nozzle 16 does not necessarily have to be aligned obliquely to the piston axis 17 here as in the case which is drawn but rather it can generally also be aligned parallel thereto wherein of course also further embodiments of the coolant nozzle 16 are conceivable thus for example a y nozzle by means of which two.