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.
Disassembly - Components: Valvetronic: Notes
The Valvetronic system simultaneously varies the valve opening time and the intake valve opening lift between 0.3 mm and 9.85 mm, according to engine speed and load. This means that the air volume is controlled according to engine requirements. The valve gear is essentially the same as the N62 engine and has been adapted to the geometry of the N73 (with two more cylinders).
* Modifications have been made to these components making them different from the N62.
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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.