N38143 Chapter 4 Keel cooling connections - 6TGWM Figure (H) shows the connections and flow. Connections sizes are 44.5mm (1.75 ins) for the water jacket circuit and 32mm (1.25 ins) for the aftercooler circuit. 1. 2. 3. 4. Connections Flow Keel cooler Engine 5. 6. 7. 8. Thermostat Bleed Raw water pump Fresh water pump 9. 10. 11. Header tank Exhaust manifold Intercooler Page 25