Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 BMW i3 Range ExtenderFACTORY OEM SERVICE PROCEDURE
1112 Cylinder Head
11 12 CYLINDER HEAD WITH CYLINDER HEAD COVER - TIGHTENING TORQUE SPECIFICATIONS
| Type | Thread | Tightening specifications | Dimension | |
|---|---|---|---|---|
| 1AZ Cylinder head nuts | W20 | M10 | Joining torque | 30 Nm |
| 1. Angle of rotation | 90° | |||
| 2. Angle of rotation | 90° | |||
| 2AZ Cylinder head bolt | W20 | M6x50 | 10 Nm | |
| 3AZ Cylinder head cover to cylinder head. | W20 | M6 | 10 Nm | |
| 4AZ Ground strap to cylinder head cover/engine block. | W20 | M6x12 | 10 Nm |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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