Many times I have read in this forum and heard elsewhere that a dual mass flywheel should not be resurfaced.
My question is simply why?
Is the plate too thin, does it warp, is it because the plates move?

I have never seen this addressed except that it shouldn't bee done.

Thanks

 

There are a couple of reasons. I did a lot of research before I replaced my clutch and flywheel with a solid flywheel and sprung hub clutch. The first is that the OEM dual mass flywheel will wear out around 100k miles. It is a sealed unit with oil inside and springs that both act to dampen the vibration of our engine/tranny combination. I successfully had mine resurfaced, but it only lasted about another 6 months before it broke the springs inside and had to be replaced anyway. The second reason is that the millings from the resurfacing can get into the seals and wear them even faster or even damage the seal during resurfacing. This causes the oil inside to leak out and make the unit fail. Unless you have been burning the clutch bad and you have a terrible vibration during transition, you shouldn't need to resurface it. If you are close to 100k miles, go ahead and change out the flywheel and save yourself the headache of having to pull it back out. If you don't want to spend the 1300 + dollars on putting an original dual mass back in, then I suggest going to CarolinaClutches.com. I also recommend if you have anything other than a stock engine that you don't run very hard, then purchase the stage 2 kit. I have about a 400hp engine and drive pretty hard and have broken two of the OEM style clutch disks. At $850 it's not cheap, but it's better than all of the other problems you might incur.

 

Thanks, How did you know it broke the springs inside?

 

The center of the flywheel no longer rebounded when you spun it.

 

Thanks again

 

I had my original DM resurfaced (lightly) at 50K miles and a new clutch installed. It is still working well after 3 years.