With the use of the common rail injection system, the fuel is heated to above normal due to the dwell time in the high-pressure rail and the high pressure of up to 1350 bar.
The diesel fuel may be heated up to 100 °C.
This makes it necessary to install fuel cooling.
The fuel radiator comprises a serpentine pipe with four turns which is attached to the vehicle underbody and is cooled by the airstream.
Fuel flows through the fuel radiator via the return.
Illustration L0008383 shows the fuel radiator located on the vehicle underbody.