Stress tests on the flywheel
If defects are suspected in the dual-mass flywheel, DMF for short, the cause study begins. If the fault diagnostics options are not sufficient for the installed DMF, the DMF can also be examined visually, mechanically, or on a test bench, although this latter possibility remains a task for the manufacturer.
Any workshop can check a dismantled dual-mass flywheel with simple tools. It is important to know the right methods.