Col­lapsed DMF causes grief

Car Mechanics (UK) - - Tales From The Workshop -

When this 2006 Peu­geot 407 ar­rived out­side the work­shop we knew that it was go­ing to need more than just the clutch re­plac­ing. The owner was com­plain­ing that the clutch was very heavy and was now slip­ping at every gearchange. What he had dis­re­garded was that the knock­ing sound was com­ing from the en­gine while it was tick­ing over. This in­di­cated that the dual mass fly­wheel was also go­ing to need re­plac­ing.

The gear­box on the Peu­geot 407 is not eas­ily ac­cessed and re­quires the drop­ping of the sub­frame to al­low enough room to com­plete the job. This job was par­tic­u­larly messy be­cause the worn DMF had cov­ered the in­te­rior of the bell­hous­ing with tiny black dust par­ti­cles which then rained down on the me­chanic re­mov­ing the gear­box. The DMF did not have much ra­dial move­ment, but had dropped in­ter­nally and was cer­tainly in need of re­place­ment.

It was nice to get this one fin­ished and it was then time for clean over­alls be­fore mov­ing on to the next job!

The dif­fer­ence be­tween the old and new dual mass fly­wheels is quite pro­nounced.

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