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Lubrication System: Notes

In the same way as the 6-cylinder engines, the N63 engine is now equipped with a volumetric flow controlled oil pump. It is driven by the crankshaft on the flywheel side.

The oil pump is designed as a sliding-vane positive displacement pump with a control system that also operates in the same way as on the 6- cylinder engines.

Fig 1: Identifying Vane, Pump Shaft, Compression Ring, Intake Side And Sealing Strip
G06925711Courtesy of BMW OF NORTH AMERICA, INC.
COMPONENTS DESCRIPTION CHART

Index Explanation
1 Vane
2 Pump shaft
3 Compression spring
4 Intake side
5 Sealing strip
6 Slide
7 Oil chamber
8 Rotor
9 Pressure side
10 Pivot pin

The difference is that the oil pressure does not act on the control piston but rather directly on the slide. The oil pressure that acts on the slide is tapped off downstream of the oil filter and cooler, i.e. the pressure prevailing in the system.