BMW M550i xDrive (G30/G31) Torque Specifications
Back to 5 Series (G30/G31)Engine code: N63 B44C
Power: 340 kW (462hp) @ 5500 rpm
Production years: 2017-2018
Cylinder Head
Renew bolts: Yes
Tighten bolts in the following stages:
- 30 Nm
- 90°
- 140°
- M8=23 Nm
Engine Torque Specs
| Component | Torque |
|---|---|
| Main bearings | Use new bolts. Do not remove bolt coating. Slacken off support sleeves fig 1.A. Tighten bolts in the following stages: M11 x 99 mm (inner bolts) = 20 Nm M11 x 99 mm (inner bolts) = 115° M8 x 70 mm (centre bolts) = 10 Nm M8 x 70 mm (centre bolts) = 55° Support sleeve to block = 6 Nm Support sleeve bolt (outer bolt) = 10 Nm Support sleeve bolt (outer bolt) = 45°  |
| Big end bearings | When fitting new connecting rods tighten bolts as follows: 5 Nm 20 Nm 30 Nm 75° Vacuum clean off connecting rod mating surfaces. When re-fitting existing connecting rods use new bolts and tighten as follows: 5 Nm 20 Nm 30 Nm 75° Slacken off 180° 5 Nm 20 Nm 30 Nm 75° Slacken off 180° 5 Nm 20 Nm 30 Nm 75° |
| Oil pump to cylinder block | 24 Nm M6=10 Nm |
| Sump bolts | Upper sump Apply a 4,0 mm diameter bead of Three bond 1209 or equivalent to front and rear cylinder block joints. Temporarily tighten bolts 1 and 2 to 5 Nm. Use old bolts. Tighten remaining bolts to 27 Nm. Use new bolts. Tighten bolts 1 and 2 to 27 Nm. Use new bolts. Assemble components within 15 minutes.  Sump to transmission: M8 = 19 Nm M12 = 66 Nm Lower sump Use new bolts and tighten to 27 Nm. |
| Sump drain bolt | 40 Nm |
| Flywheel/driveplate | -/105 Nm Use new bolts. |
| Crankshaft pulley/damper centre bolt | Use new bolt. Lubricate mating surface. Tighten bolt in the following stages: 100 Nm 60° 60° 60° |
| Crankshaft pulley/damper bolts | 40 Nm |
| Camshaft sprocket/gear | Tighten bolts in the following stages: Oil control valve: 5 Nm 30 Nm 50 Nm 30° |
| Camshaft carrier/cap | 10 Nm |
| Camshaft/rocker cover | 10 Nm Tighten bolts in sequence  |
| Inlet manifold to cylinder head | M6=10 Nm M8=22 Nm |
| Exhaust manifold to cylinder head | 15 Nm Use new nuts. |
| Exhaust downpipe to manifold | 55 Nm |
| Water pump | 10 Nm |
| Spark plugs | 23 Nm |
| Fuel rail | 10 Nm |
| Crankshaft position (CKP) sensor/engine speed (RPM) sensor | 8 Nm |
| Camshaft position (CMP) sensor | 8 Nm |
| Engine coolant temperature (ECT) sensor | 18 Nm |
| Lambda sensor (Oxygen) | 50 Nm Coat threads with high temperature lubricant (BMW part No. 83-23-2-158-852). High temperature lubricant must not enter slots on lambda sensor. |
| Knock sensor (KS) | 22 Nm |
| Engine oil pressure switch | 15 Nm |
| Oil filter | Lubricate seal contact surface. Tighten in the following stages: 30 Nm Slacken off 180° 40 Nm |
Chassis Tightening Torques
| Component | Torque |
|---|---|
| Front hub | 210 Nm+90° Use new bolt. |
| Front hub - wheel bearing housing bolts | Front/rear hubs Use new bolts and tighten in the following stages: 20 Nm 140 Nm Slacken off 45° 120 Nm 90° |
| Rear hub | 210 Nm+90° Use new bolt. |
| Rear hub - wheel bearing housing bolts | Front/rear hubs Use new bolts and tighten in the following stages: 20 Nm 140 Nm Slacken off 45° 120 Nm 90° |
| Steering wheel | 63 Nm Use new bolt. |
| Steering rack/box mounting | Steering rack/box fixing Use new nuts/bolts. Steering rack to crossmember = 60 Nm + 90° Anti-roll bar clamping bracket to crossmember = 100 Nm + 45°  |
| Steering track rod end | 165 Nm Use new nut. |
| Brake disc to hub (Front) | 16 Nm Use new bolt. |
| Brake caliper to carrier (Front) | 35 Nm Use new bolts. |
| Brake caliper/carrier to hub (Front) | 130 Nm Use new bolts. |
| Brake disc to hub (Rear) | 16 Nm Use new bolt. |
| Brake caliper to carrier (Rear) | 35 Nm Use new bolts. |
| Brake caliper/carrier to hub (Rear) | 130 Nm Use new bolts. |
| Back plate to hub (Rear) | 8 Nm Use new bolts. |
| ABS sensor (Front) | 12 Nm Use new bolt. |
| ABS sensor (Rear) | 12 Nm Use new bolt. |
| Road wheels | 140 Nm Lightly coat mating surfaces between wheel centre hole and hub (use grease). Do NOT lubricate bolts. |
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