Description And Operations: Description: Notes

Each turbocharger consists of two turbo elements, a turbine wheel and compressor wheel, enclosed separately in cast housings and mounted on a common shaft. The shaft in the primary turbocharger rotates in two ball bearings, however the secondary turbocharger comprises two semi-floating bearings which provide the shaft rotation.

The turbocharger bearings are lubricated and cooled by an oil supply from the cylinder block. The primary turbocharger has a connection for the engine cooling circuit to provide the appropriate cooling efficiency of the ball bearing. The primary turbocharger return oil drains into a dedicated area of the oil pan, assisted by an oil scavenge element in the vacuum pump. If fitted, the secondary turbocharger return oil drains into a dedicated area of the crankcase directly via drain tube.

For additional information, refer to: ENGINE