13 53 Fuel Injection Nozzles and Pipes
WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2015 BMW Alpina B7L, 2015 BMW Alpina B7, 2014 BMW Alpina B7L, 2014 BMW Alpina B7, and 2013 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.
TIGHTENING TORQUE SPECIFICATION - FUEL INJECTION NOZZLES AND PIPES
| Type | Thread | Tightening specification | Measure | ||
|---|---|---|---|---|---|
| 1AZ | Rail, high-pressure side, to cylinder head | N63 | M7 | 13 ± 2 Nm | |
| 2AZ | High-pressure lines to rail and injector | N63 | M12 | Initial tightening | 10 Nm |
| Final tightening (Retorque twice) | 23 Nm | ||||
| 3AZ | High-pressure line to rail and high-pressure pump | N63 | M14 | Initial tightening | 10 Nm |
| Final tightening (Retorque twice) | 30 Nm | ||||
| 4AZ | Feed line to high-pressure pump | N63 | M14 | Initial tightening | 10 Nm |
| Final tightening (Retorque twice) | 30 Nm | ||||
| 5AZ | Holding-down element to cylinder head for injection nozzles | N63 | M7 | 13 ± 2 Nm | |
| 6AZ | Lug to fuel low-pressure sensor | N63 | M6 | 10 Nm | |
| 7AZ | Retaining clips to holder | N63 | M6 | 10 Nm | |
| 8AZ | High-pressure sensor to rail, high-pressure side | N63 | 30 Nm | ||
| 9AZ | Low-pressure fuel sensor to feed line | N63 | 20 Nm | ||