The heat exchanger is to the left and the raw water pump is the one just behind the new pulley. The old raw water pump now serves the engine fresh water cooling loop. Topping off the coolant requires pouring in small amounts using a small container; the trade off was to mount it lower requiring check valves. Converting to fresh water cooling is what precipitated the installation of the hot/cold pressurized shower. The pressure water system is only for the shower.