Charge Air Cooling
Like the N63, the N74 engine also has indirect charge air cooling. The heat from the pressurized fresh air is transferred to the coolant flowing inside two (air to coolant) intercoolers. Then it flows to a dedicated heat exchanger where the heat energy is then released into the ambient air. This system enables the charge air pipe length to be kept very short, thereby reducing pressure losses.
The charge air coolers are mounted on top of the engine, directly connected to the air intake system.