MTU 12V4000G34F Operating Instructions Manual page 61

Charge-air coolant circuit (LT)
The charge-air coolant pump (5) installed on the engine pumps the charge-air coolant to the intercooler (10).
The charge-air coolant reaches the thermostat (4) via the intercooler (10). The charge-air coolant flows to the
external charge-air coolant cooler via the thermostat when the engine is at operating temperature. Cooled
charge-air coolant coming from the charge-air coolant cooler flows to the charge-air coolant pump (5).
When the engine is cold, the thermostat routes the charge-air coolant directly to the charge-air coolant
pump (5).
The remote charge-air coolant expansion tank is installed at the highest point of the cooling system. It com-
pensates charge-air coolant quantity and pressure and is connected to the circuit by an expansion and vent
line.
Drain plugs are provided at the lowest points of the charge-air coolant circuit.
MS15060/01E 2018-12 | Functional Description | 61