Cooling System Diagram 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 Bleeder screw on turbocharger 8 Exhaust manifold, liquid−cooled 2 Intercooler 9 Crankcase 3 Sea water pump 10 Engine oil cooler 4 Expansion tank 11 Impeller 5 Positive pressure / negative pressure valve 12 Thermostat 6 Coolant filler neck 13 Water pump housing 7 Turbocharger, liquid−cooled 14 Sea water heat exchanger 22