Porsche's Vibrating Dual-Mass Flywheel

This bulletin applies to Porsche Boxster, Cayman, Panamera and Carrera vehicles equipped with a dual-mass flywheel (DMF). A vibration may be experienced. With the vehicle stationary, increase engine speed evenly from idle speed. If vibrations get stronger with increased engine RPM, remove the DMF and inspect. Look for an unusual amount of leaking grease. Slight traces of grease is normal but look for a clearly visible ring of grease close to the DMF in the clutch bell-housing. 

Also look for missing balance weight(s). If a heavy deposit of grease and/or missing balance weight, replace the DMF.

The flange of the DMF must be able to turn torsionally, but it must not turn back automatically. The possible turning angle (clearance angle) is approximately 6 – 8 degrees.

Inspect the missing balance weights

Inspect for damaged sealing diaphragm as cause for leaks.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

About the Author

Mike Mavrigian | Editor

Mike received a BA degree from Youngstown State University in English Literature with a minor in Journalism in 1975.