Variable Geometry Turbocharger Cooling
WARNING: This page is about a different car, the 2018 Land Rover Discovery and 2017 Land Rover Discovery. However, it is still accessible from the selected car via links, so may be relevant.
The VGT receives an engine oil feed via a pipe from the cylinder block. The pipe supplies the VGT with engine oil for lubrication and cooling purposes. An oil drain pipe from the VGT allows oil to drain from the VGT into the cylinder block. The rapid acceleration and deceleration response demands of the VGT rely greatly on a steady flow of clean oil. The oil supplied from the engine's lubrication system provides lubrication to the VGT's spindle and bearings, while also acting as a coolant for the VGT bearing housing.
The VGT also has a connection for the engine cooling circuit to provide the appropriate cooling efficiency of the ball bearing.