Detailed description: Cooling
The turbocharger is water-cooled, which lowers the temperature in the bearing housing considerably. Temperature reduction reduces the risk of the oil boiling and the damages that can arise from such. Coolant is taken via a pipe from the cylinder head. After passing the bearing housing, coolant is led further via pipes to the thermostat housing. When the engine has been switched off and the coolant pump has stopped, coolant in the system self-circulates through thermosiphoning (The illustration shows coolant flow when the engine is running).