Turbocharger Oil Lubrication System
| ITEM | DESCRIPTION |
|---|---|
| 1 | Oil feed to turbocharger |
| 2 | Oil feed from cylinder block (T piece) |
| 3 | Vacuum pump (Brake servo assist and turbocharger oil supply pump) |
| 4 | Oil feed from turbocharger oil reservoir |
| 5 | Turbocharger oil reservoir oil filter |
| 6 | Vent pipe |
| 7 | Connection to oil pan oil return pipe |
| 8 | Turbocharger oil return pipe |
| 9 | Variable Geometry Turbine (VGT)- turbocharger |
| 10 | Turbocharger oil reservoir |
| 11 | Oil pan |
| 12 | Vent pipe |
The TDV6 turbocharger system has an oil circuit which is primarily supplied by the engine oil pump and fed to the housing of the turbocharger via an outlet at the back of the cylinder block. Land Rover variants of the TDV6 engine have a vacuum pump driven off the exhaust camshaft on bank 1, this provides brake booster vacuum and also turbocharger oil supply in certain conditions. The vacuum pump draws oil from a dedicated reservoir within the oil pan via a filter, this oil is then fed to the turbocharger via a port in the cylinder head. The secondary oil feed supplied by the vacuum pump is to make sure that there is adequate lubrication of the bearing races and housing when the vehicle is manoeuvring at extreme angles. The reservoir is replenished with oil from the drain tube below the turbocharger, it also has a breather tube into the cylinder block.
See OIL FLOW DIAGRAMS at the end of this document.