Engine Performance: System: Turbocharger: Description
Most models use a water-cooled turbocharger, mounted directly to the exhaust manifold with a wastegate assembly attached to rear of turbine housing. The turbocharger consists of a turbine/compressor assembly, oil supply system and wastegate. Other components include impellers, impeller shaft, bearings and impeller housings.
The safety valve of the system is a pressure actuated wastegate that prevents excessive intake boost pressure.
Turbocharger operation requires a large quantity of clean oil to prevent bearing failure. Engine oil pressure provides constant lubrication to the system.