Engine Diagrams C Series Page E-8 Section E - Engine and System Identification Engine Diagrams Engine Views Marine Applications Top View, C Series, Six-Cylinder Sea Water Aftercooled 450C 1 Engine mount (front) 2 Expansion tank 3 Coolant fill 4 Engine oil fill 5 Valve cover 6 Coolant vent line connections 7 Coolant thermostat location 8 Heat exchanger 9 Exhaust manifold (water cooled) 10 Exhaust outlet elbow 11 Turbocharger (water cooled) 12 Turbocharger coolant vent line 13 Turbocharger oil inlet 14 Inlet air crossover tube 15 Air filter 16 Aftercooler (sea water-type) 17 Air heater 18 Fuel injector 19 Fuel pump.