53
= Charge air or freshwater = Seawater
Flow through charge air cooler (CAC) in the TAMD63
1. Charge air cooler (CAC) 4 Seawater inlet (from sea-
2. Heated charge air from the water pump)
turbocharger 5. Seawater outlet (to heat
3. Cooled charge air to the exchanger)
engine’s combustion chambers
Thermostat function, cold engine
Thermostat function at operating temperature
Flow through heat exchanger in the TAMD63
1. Expansion tank 4. Heat exchanger
2. Hot coolant from the engine’s 5. Seawater inlet (from
thermostat housing charge air cooler)
3. Coolant to coolant pump’s 6. Seawater outlet (to reverse
suction side gear’s oil cooler)
TAMD71, TAMD72: Coolant pump (circulation pump)
and thermostat housing
1. Piston thermostat
Thermostat
The engines have a piston thermostat which has a
bulb filled with wax. When the engine is cold, the
thermostat keeps the route to the heat exchanger
completely closed. The coolant is then fed directly
back to the engine through a by-pass line. After the
engine has warmed up, the volume of the wax in-
creases and the thermostat subsequently opens the
route to the heat exchanger, while the by-pass line is
closed.
2
5
3
4
1
1
4
6
5
2
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