The cooling concept of the M47 has been adapted and further developed for this engine.
The gear oil cooler is integrated in the cooling assembly. The capacity of the intercooler has been adapted to the increased volume and is integrated in the centre of the cooling assembly.
The coolant change interval is every 4 years. When changing, the different filling capacities should be borne in mind:
• M57 E38/E39 approx. 9.2 litre
• M67 E38 approx. 16.0 litre
M57-specific features
• The AUC sensor is located below the centre of the fan shroud.
• The expansion tank is mounted behind the headlights
Vehicle-specific fan shrouds with different apertures are installed in the E39 and E38. This is necessary due to the fan displacement by approx. 20 mm. The fan will be damaged if interchanged.
For differentiation purposes, an identification code is cast in the top inside of the fan shroud:
• E39M57 Identification code “A”
• E38M57 Identification code “B”
M67-specific features
• Expansion tank integrated in fan shroud
• 5 back-up flaps integrated in fan shroud
• The AUC sensor located above the centre of the fan shroud.
• Brush seal installed in cutout of fan shroud to improve uphill driving cooling properties
In the E38, the water level (level switch) for the expansion tank is indicated as standard in the instrument cluster.
