Crankcase Ventilation System: Notes
The crankcase breather on the N63 engine operates in accordance with the same principle as on the N54 engine. In the case of the N63 engine, each cylinder bank has its own crankcase breather.
The crankcase ventilation on the N63 operates in two modes, similar to the N54. One mode is for turbocharged operation and the other is for "naturally aspirated mode" which is usually under deceleration.
COMPONENTS DESCRIPTION CHART
| Index | Explanation |
|---|---|
| A | Overpressure |
| B | Vacuum |
| C | Exhaust gas |
| D | Oil |
| E | Blow-by gasses |
| 1 | Air cleaner |
| 2 | Intake manifold |
| 3 | Oil separator |
| 4 | Oil drain |
| 5 | Ventilation duct |
| 6 | Crankshaft cavity |
| 7 | Oil sump |
| 8 | Oil return channel |
| 9 | Exhaust turbocharger |
| 10 | Clean air pipe |
| 11 | Line to clean air pipe |
| 12 | Check valve (non-return) to intake |
| 13 | Throttle valve |
| 14 | Check valve to clean air pipe |
| 15 | Line to intake manifold |
| 16 | Pressure restrictor |