13 53 Fuel Injector Nozzles and Lines
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 BMW 325i, 2005 BMW 325Ci, 2004 BMW 325i, 2004 BMW 325Ci, and 2003 BMW 325i. 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 Nozzle holder combination (assembly) | M21 / M51 | 80 Nm | ||
| 2AZ Injection nozzle assembly in cylinder head | M21 | 40 Nm | ||
| M51 / M41 | 65 Nm | |||
| 3AZ Fuel injection line (union nut) to injection pump and nozzle combination | M21 / M51 / M41 | 20 Nm | ||
| 4AZ Feed line to fuel injection pipe | M43 / M44/M43TU | 20 Nm | ||
| 5AZ Injector nozzles - Combination in Cylinder head cover |
M47 | M6 | 10 Nm | |
| Injector in cylinder head cover (Common Rail System) | M47TU / M47T2 / M57 / M57TU / M57T2 | M6 | Establish the screw connections alternately. | |
| 1. Jointing torque | 1 Nm | |||
| 2. Jointing torque | 4 Nm | |||
| 3. Final torque | 9 Nm | |||
| M67 | M8 | 30 Nm | ||
| 6AZ Fuel injection line to injection pump (VP44) colour: yellow chromated up to 10/2000 | M47 | 30 Nm | ||
| Fuel injection line to injection pump (VP 44) Colour: grey phosphate coating from 10/2000 |
M47 | 20 Nm | ||
| 7AZ Fuel injection line to injector nozzle Colour: yellow chromated up to 10/2000 |
M47 | 30 Nm | ||
| Fuel injection line to injector nozzle Colour: grey phosphate coating from 10/2000 |
20 Nm | |||
| 8AZ Pressure lines (Common Rail System) | M57 / M47TU | |||
| Injector Colour: yellow chromated up to 10/2000 |
30 Nm | |||
| Injector Colour: yellow chromated from 9/2002 |
M57TU | M12 x 1.5 | 23 Nm | |
| Injector Colour: grey phosphate coating from 10/2000 |
20 Nm | |||
| Pressure accumulator, fuel distributor or Colour: yellow chromated High pressure pump up to 10/2000 |
35 Nm | |||
| Pressure accumulator, fuel distributor or High pressure pump Colour: grey phosphate coated from 10/2000 | 20 Nm | |||
| Pressure accumulator, fuel distributor or High pressure pump Colour: yellow chromated from 9/2002 | M57TU | M14 x 1.5 | 23 Nm | |
| 8AZ Pressure lines (Common Rail System) | M67 / M47T2 / M57T2 | |||
| Injector | 23 Nm | |||
| Pressure accumulator, fuel distributor or high pressure pump | 23 Nm | |||
| 9AZ Rail pressure sensor to pressure accumulator (Common Rail System) | M57 RDS2 | 38 Nm | ||
| M57 RDS4 | 38 Nm | |||
| M47TU / M57TU / M47TU2 / M57TU2 | 70 Nm | |||
| 10AZ Pressure regulator to high pressure pump (Common Rail System) | M57 / M67 | 9 Nm | ||
| 11AZ Pressure control valve to fuel distributor (Common Rail System) | E38 / M67 | 5 Nm | ||
| E65 / M67 | 80 Nm | |||
| 12AZ Rail pressure sensor to fuel distributor (Common Rail System) | E38 / M67 / RDS2 | 38 Nm | ||
| E38 / M67 / RDS4 | 38 Nm | |||
| E65 / M67 | 70 Nm | |||
| 13AZ Rail pressure control valve to pressure accumulator (Common Rail System) | M47TU / M57TU | 80 Nm | ||
| M47TU2 / M57TU2 | 1) Tightening | 60 Nm | ||
| 2) Opening by | 90 ° | |||
| 3) Final torque | 85 Nm | |||
| 14AZ Fuel return line to rail | M47TU / M57TU | Banjo bolt | 25 Nm | |
| 15AZ Fuel line to fuel injection pipe | M56 | 26 Nm | ||
| 16AZ Injector to fuel injection pipe | M56 | 26 Nm | ||
| 17AZ Threaded support sleeve to rail | M57 | 60 Nm |