Dual Mass Flywheel - BMW 1 / 3 / Z4 Series - Various Models

Dual Mass Flywheel - BMW 1 / 3 / Z4 Series - Various Models

BMW Part Number: 21 20 7 568 006 / 21 20 7 541 018

Brand: LUK (O.E.M)

Fitment: Complete

To Fit the following Models:

E87 1-Series 5-Door 118i - <-05/07 - All Models

E87 1-Series 5-Door 120i - <-05/07 - All Models

E90 3-Series Sedan 320i - N46 <-05/07 - All Models

E91 3-Series Touring 320i - N46 <-05/07 - All Models

E85 Z4 Series 2.0i - <-05/07 - All Models

A glance at the benefits of the Luk dual mass flywheel

• Top driving comfort
• Absorbs vibrations
• Prevents noise
• Enables comfortable, low-revs driving
• Saves fuel
• Relieves crankshaft and gearbox

This all makes the LuK dual mass flywheel the ideal solution.
With one drawback: the higher the mass reactance of the vibrating masses, the more excessive the resonance increase and associated torque peaks. With the dual mass flywheel, this would be easily perceived when starting and stopping the engine; much more easily than with a conventional clutch system. Additionally: the smaller flymass of the engine has less of a stabilising effect on the speed fluctuation of the engine.

Thanks to decades of experience in clutch building, the LuK specialists were able to find an excellent solution to this problem. An additional damping device effectively prevents resonance overload. In normal operation, however, this additional damping device has no function and the torsional vibrations of the engine are filtered out by spring dampers.

Friction and spring rate – the correct ratio is important.
For optimal vibration isolation and soft resonance passage when starting and stopping the engine, the ratio between friction and spring rate must be optimal. The length of the springs is a key factor: The softer a spring, the more efficiently vibrations are isolated. The extra-long springs of the latest generation of dual mass flywheels significantly reduce the spring rate compared to a first generation dual mass flywheel. In routine driving operations, excessive resonance increases are kept almost completely away from the gearbox