dual mass flywheel: LUK vs SACHS..?

[DennisAN]

Originally Posted by jb92563

So you say the DMFW can wear out, what symptoms of that would you notice, just out of curiosity.

From Project 44 in Wayne Dempsey's book:

Now, it's time to turn our attention back to the flywheel end of the engine. Porsche Tech Bulletin 8/02 1360 says to check the dual mass flywheel by twisting it approximately 15mm to both the left and the right, checking to make sure that it returns to its approximate starting position. If the flywheel can be twisted beyond about 15mm with no noticeable increase in spring force, or if it cannot be twisted at all then it probably needs replacement.