Bmw 316i overheating

the water pump is right behind the fan pulley you can barely see it not much room to see it but its right behind the fan pulley
Did you bleed the system after you changed all those parts? let the car run and the purge the system when it starts overheating all you need is a flat screwdriver and its located right next to the radiator cap

check if the water is circulating as you might have a blockage in the header tank. this can be checked by opening the radiator cap and check if the water is circulating on top.