Oil Supply: Notes
The following graphics show an overview of the oil circuit of the N55. Compared to the N54 engine, there are considerably fewer oil ducts in the cylinder head. This is mainly due to the use of the new VANOS solenoid valves.
INDEX EXPLANATION CHART
| Index | Explanation |
|---|---|
| 1 | Intake pipe |
| 2 | Oil pump |
| 3 | Unfiltered oil duct |
| 4 | Oil filter |
| 5 | Main oil duct (filtered oil duct) |
| 6 | Chain tensioner |
| 7 | VANOS solenoid valve, exhaust side |
| 8 | VANOS solenoid valve, intake side |
| 9 | VANOS adjustment unit, intake side |
| 10 | VANOS adjustment unit, exhaust side |
| 11 | Oil duct for intake camshaft and eccentric shaft lubrication |
| 12 | Hydraulic valve lash adjustment |
| 13 | Oil duct for exhaust camshaft lubrication |
| 14 | Hydraulic valve lash adjustment |
| 15 | Connection to exhaust turbocharger lubrication |
| 16 | Connection for oil spray nozzles |
| 17 | Crankshaft bearing |
| 18 | Oil duct for oil pressure control |
| 20 | Oil duct for oil pressure control |
| 21 | Oil duct for vacuum pump lubrication |
| 22 | Vacuum pump |
INDEX EXPLANATION CHART
| Index | Explanation |
|---|---|
| 1 | Intake pipe |
| 2 | Oil pump |
| 3 | Unfiltered oil duct |
| 4 | Oil filter |
| 5 | Main oil duct (filtered oil duct) |
| 6 | Chain tensioner |
| 7 | VANOS solenoid valve, exhaust side |
| 8 | VANOS solenoid valve, intake side |
| 9 | VANOS adjustment unit, intake side |
| 10 | VANOS adjustment unit, exhaust side |
| 15 | Connection to exhaust turbocharger lubrication |
| 16 | Connection for oil spray nozzles |
| 17 | Crankshaft bearing |
| 18 | Oil duct for oil pressure control |
| 19 | Oil pressure control valve |
| 21 | Oil duct for vacuum pump lubrication |
| 22 | Vacuum pump |