VS - Transmission Systems Dual-Mass Flywheel DMF valeoscope

9. Analysis and diagnosis of damage to the Dual Mass Flywheel

9.1 Visual inspection

Visual inspections can also be conducted when the flywheel is installed on the engine.

In this case, use a very powerful light to conduct the inspections.

9.1.1 Trace of grease or oil

No trace of grease or oil on the friction surface of the secondary flywheel.

Check grease egress which may require D.M.F. replacement (from primary flywheel…)

Light traces of grease on the engine side surface of the flywheel do not affect the operation of the flywheel.

9.1.2 Worn or damaged starter ring gear

Dual-mass flywheels with worn or damaged starter ring gears must be replaced.

If the starter ring is heavily worn, also check the starter as it may be defective.

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