13 53 Fuel Injector Nozzles and Lines
WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.
TIGHTENING TORQUE SPECIFICATIONS - FUEL INJECTOR NOZZLES AND LINES
| Type | Thread | Tightening specifications | Dimension | |
|---|---|---|---|---|
| 1AZ High-pressure rail to cylinder head | N63 B44 O 0 | M7 | 13 ± 2 Nm | |
| N63 B40 O 1 / N63 B44 O 1 | M6 | 10± 1.5 Nm | ||
| 2AZ High pressure lines to rail and injector / high-pressure rail on injector | N63 B44 O 0 / N63 B40 O 1 / N63 B44 O 1 | M12 | Initial torque | 10 Nm |
| Final torque (Retorque twice) | 23 Nm | |||
| 3AZ High pressure line to rail and high pressure pump / high-pressure rail to high pressure pump | N63 B44 O 0 / N63 B40 O 1 / N63 B44 O 1 | M14 | Initial torque | 10 Nm |
| Final torque (Retorque twice) | 30 Nm | |||
| 4AZ Feed line to high pressure pump | N63 B44 O 0 / N63 B40 O 1 / N63 B44 O 1 | M14 | Initial torque | 10 Nm |
| Final torque (Retorque twice) | 30 Nm | |||
| 5AZ Holding-down element to cylinder head for injection nozzles | N63 B44 O 0 | M7 | 13 ± 2 Nm | |
| 6AZ Tab on the fuel low-pressure sensor / feed line to cylinder head cover and cylinder head | N63 B44 O 0 | M6 | 10 Nm | |
| 7AZ Retaining clips to holder | N63 B44 O 0 | M6 | 10 Nm | |
| N63 B40 O 1 / N63 B44 O 1 | M5 | 6 Nm | ||
| 8AZ High-pressure sensor to rail, high-pressure side | N63 B44 O 0 / N63 B40 O 1 / N63 B44 O 1 | 30 Nm | ||
| 9AZ Low-pressure fuel sensor to feed line | N63 B44 O 0 | 20 Nm | ||
| 10AZ Special tool 13 0 300 to cylinder head cover | N63 B44 O 0 | 10 Nm | ||
| 11AZ Special tool 2 249 115 to cylinder head cover | N63 B40 O 1 / N63 B44 O 1 | M7 | 13 Nm | |
| M6 | 10 Nm |