LUK-dual mass flywheels

What causes dual mass flywheels to fail?

LUK explains common causes for premature dual mass flywheels failure and how to find cost effective OE quality replacement solutions when needed.

With approximately 23 million vehicles on UK roads fitted with dual mass flywheels (DMFs), the demand for aftermarket replacements remains strong and constant. The current trend towards lighter vehicles, lower emissions and more engine torque secures prospects for DMF sales as it offers more driving comfort and reduced fuel consumption.

Despite the technology being introduced more than 30 years ago, dual mass flywheels remain the most effective solution in controlling drivetrain vibration levels. LuK dual mass flywheels are engineered to uphold the technological heritage in providing driver comfort through optimum noise and vibration absorption, relaxed low-revolution driving and in turn, relieve crankshaft and gearbox stress.


Due to the nature of its operating environment, wear and tear remains one of the most common causes for DMF failure. However, various factors can cause damage and lead to premature failure. The most common factors include:

  • Not rectifying engine misfires
  • Inappropriate driving styles
  • Overloading vehicles or towing excessive weight
  • ‘Chipped’ ECUs that falsely promise to increase power or torque

Some installers may choose to use aftermarket ‘conversion kits’to replace the original DMF. Whilst the added weight will help in controlling drivetrain vibration, it also pushes the engine to operate beyond its tested tolerances and specifications that may lead to damage in other components. This is why LuK always advises installers to replace a damaged DMF with an OE quality replacement.


When replacing a defective DMF, LuK recommends replacing the clutch together with it, in order to avoid premature damage to the corresponding components. LuK recently introduced a small range of 12 RepSet DMFs designed to provide precision-tuned components along with the DMF through a single part number. This is to ensure all parts work cohesively after a DMF replacement. More RepSet

DMFs are currently in the development pipeline, scheduled for later release.

Highlights include:

  • 600001600 for Audi A3 1.9 (2004-2010)
  • 600001700 for Volkswagen Golf 2.0 (2008-2013)

Besides the DMF, the set also contains a clutch disc, clutch pressure plate, all the bolts needed for replacement (stretch bolts) and a conventional release bearing or hydraulic concentric slave cylinder (CSC). Each RepSet DMF is precision matched in the factory to ensure a perfect and professional fit – first time, every time.


To replace DMFs effectively, installers need to know the precise operating tolerances and bolt torque

settings that are unique in each application. This information is available on the DMF CheckPoint App (available for free download via iTunes and Google Play Store). By simply entering the part number, installers are supplied with all the necessary data required to conduct a professional repair.

LuK RepSet DMFs are catalogued on the F:Drive and MAM Autocat. For more information, please contact your local FPS representative.


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