18 31 Exhaust system
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2018 BMW M6, 2018 BMW 650i xDrive, 2018 BMW 650i, 2018 BMW 640i xDrive, and 2018 BMW 640i. However, it is still accessible from the selected car via links, so may be relevant.
TIGHTENING TORQUE SPECIFICATION - EXHAUST SYSTEM
| Type | Thread | Tightening specifications | Dimension | ||
|---|---|---|---|---|---|
| 1AZ | Exhaust system to catalytic converter | N63 B44 O 0 | nut M8 | 20 Nm | |
| N63 B40 O 1/N63 B44 O 1 | Clamp | 55 Nm | |||
| 2AZ | Exhaust manifold to cylinder head | N63 B44 O 0 | nut M8 | 15 Nm | |
| 3AZ | Heat shield to cylinder head | N63 B44 O 0/N63 B40 O 1/N63 B44 O 1 | M6 | 10 Nm | |
| 4AZ | Clamp to exhaust manifold | N63 B44 O 0/N63 B40 O 1/N63 B44 O 1 | M8 | 23 Nm | |