Cooling System: Diagrams

Coolant Hose Connection Diagram

Risk of scalding due to hot steam and hot coolant.

• The coolant system is under pressure when the engine is warm.

• Cover the coolant reservoir cap with a cloth and then open it slowly to release the pressure in the system.

Risk of injury through fan turning on automatically.

• The radiator fan can come on even when the ignition is turned off, for example, caused by the heat still in the engine compartment.

• Secure all hose connections with hose clamps of the same type as those equipped by the factory.

• Arrows on coolant pipes and coolant hoses must line up across from each other.

• Blue = large coolant circuit.

• Red = small coolant circuit.

• Orange = coolant circuit for the charge air cooler.

• Brown = heating circuit.

• The arrows show the coolant flow direction.






1 Charge Air Cooling Circuit Right Cooler

• Change coolant after replacing

2 Bleeder Screw

3 Radiator

• With integrated ATF cooler

• Change coolant after replacing

4 Engine Coolant Temperature (ECT) Sensor (G62)

5 Charge Air Cooling Pump (V188)

6 Generator

7 Charge Air Cooler on the Right Side

• Inside the compressor housing

• Change coolant after replacing

8 Bleeder Screw

9 Coolant Reservoir

10 Cover

• For the coolant reservoir

• Pressure relief valve, checking => [ Pressure Relief Valve in Cap, Checking ] Testing and Inspection

11 To Heat Exchanger for Heater Unit

12 Cylinder Head Bank 1 (right)

• Change coolant after replacing

13 From Heat Exchanger for Heater Unit

14 Coolant Pump

15 Cylinder Head Bank 2 (left)

• Change coolant after replacing

16 Bleeder Screw

17 Left Charge Air Cooler

• Inside the compressor housing

• Change coolant after replacing

18 Coolant Thermostat

19 Engine Oil Cooler

20 After-Run Coolant Pump (V51)

• Depending on country

21 Non-Return Valve

• In the coolant hose

22 Bleeder Screw

23 Left Charge Air Cooling Circuit Radiator

• Change coolant after replacing

24 Non-Return Valve

• In the coolant hose