Water pump (new part) HY 9/50 till 9/63, U23. Or.Nr. 456815. Caution: The HY has an open cooling
system. It is essential to check if the radiator cap is the right one ! The water pump can evacuate some cooling water through a small opening. New water pumps need approx. 500 km to 1000 km to get at 99,5 % leakproof. It is just normal to see some drops of water on the water pump!
