Many vehicle manufacturers choose to equip new models with a Dual Mass Flywheel and the trend is growing. The reasons for this are the technical benefits provided by
the DMF as well as the need for increasing noise comfort while reducing emissions of state-of-the-art engines. The DMF characteristics are precisely attuned to each vehicle.
Always check the Dual Mass Flywheel (DMF) when replacing the clutch. A worn and defective DMF can damage the newly installed clutch!
A 100% functional test of the Dual Mass Flywheel includes among other things testing the characteristics of the Arc Springs during compression. This testing can only be carried out using a special test facility.
In addition, your assessment of the DMF’s operational reliability should be based on the following criteria:
grease egress
condition of the friction surface (e.g. signs of thermal load / thermal cracks)
noise emissions
condition of the clutch, etc.
mileage
When uncertain, always replace the DMF along with the clutch.