Installation Manual

N38143 Chapter 4
Page 23
Keel cooling connections - 4.4TWGM and 4.4TW2GM
These engines require two keel coolers and do not have a header tank as part of the engine package, but
have a remotely mounted expansion tank. Figure (F) shows the connections and ow. Connections sizes are
38mm (1.5 ins) for the water jacket circuit and 32mm (1.25 ins) for the aftercooler circuit.
Connections
Flow
Keel cooler
Remote tank
1.
2.
3.
4.
Fresh water pump
Thermostat
Engine
Integral engine oil cooler
5.
6.
7.
8.
Exhaust manifold
Aftercooler
Bleed
Raw water pump
9.
10.
11.
12.