11 37 Variable valve gear
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2013 BMW 328xi, 2013 BMW 328i, 2012 BMW 328xi, 2012 BMW 328i, and 2011 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.
TIGHTENING TORQUES - VARIABLE VALVE GEAR [N51]
| Type | Thread | Tightening specification | Measure | |
|---|---|---|---|---|
| 1AZ Gate to cylinder head | N51 | M6 x 23 | 10 Nm | |
| 2AZ Return spring to cylinder head | N51 | M6 x 20 | 10 Nm | |
| 3AZ Electric servodrive to cylinder head | N51 | M6 x 16 | Observe repair instruction | 10 Nm |
| 4AZ Electric servodrive to cylinder head cover | N51 | M6 x 16 | 9 Nm | |
| 5AZ Oil spray nozzle to gate | N51 | M6 x 30 | 10 Nm | |
| 6AZ min stop of eccentric shaft to cylinder head | N51 | M6 | 10 Nm | |
| 7AZ Eccentric shaft bearing cap to cylinder head (steel screw) | N51 | M6 x 30.5 | Replace screws | 9 Nm |
TIGHTENING TORQUES - VARIABLE VALVE GEAR [N52K]
| Type | Thread | Tightening specification | Measure | |
|---|---|---|---|---|
| 1AZ ASA screws (11 x) Guide block to timing case. |
N52K | M6 x 23 | Only one screw (inside) plus the oil spray nozzle are fitted on cylinder no. 3. | 10 Nm |
| 2AZ ASA screws (6 x) Torsion spring to cylinder head. |
N52K | M6 x 20 | 10 Nm | |
| 3AZ ASA screws (2 x on cylinder head) (1 x on cylinder head cover) Electric servomotor to cylinder head and to cylinder head cover. |
N52K | M6 x 16 |
|
10 Nm |
| 4AZ ASA screw (1 x) Oil spray nozzle to guide block |
N52K | M6 x 30 | Oil spray nozzle is fitted on cylinder no. 3 (outside). | 10 Nm |
| 5AZ Stop screw (1 x) Stop screw of eccentric shaft to cylinder head. |
N52K | M6 | 10 Nm |