If there is any movement as indicated by the arrows in the figure, replace the dual-mass flywheel. (See CLUTCH UNIT REMOVAL/INSTALLATION [C66M-R].)
CAUTION:
Do not rework the dual-mass flywheel if it is distorted.
Do not clean the dual-mass flywheel with any kind of fluid. Clean the dual-mass flywheel with a dry cloth only.
Do not clean the gap between the primary and secondary mass. Only clean the bolt connection surface and the clutch surface.
1. Remove the manual transaxle. (See MANUAL TRANSAXLE REMOVAL/INSTALLATION [C66M-R].)
2. Remove the clutch cover and clutch disc. (See CLUTCH UNIT REMOVAL/INSTALLATION [C66M-R].)
3. Rotate the dual-mass flywheel or attempt to move it up and down, and left and right to verify that the center of the dual-mass flywheel does not move.
If there is any movement as indicated by the arrows in the figure, replace the dual-mass flywheel. (See CLUTCH UNIT REMOVAL/INSTALLATION [C66M-R].)
4. Verify that the secondary mass does not rotate by 15 teeth or more.
If it rotates by 15 teeth or more, replace the dual-mass flywheel. (See CLUTCH UNIT REMOVAL/INSTALLATION [C66M-R].)
5. Measure the amount of guide pin projection of the dual-mass flywheel.
If it exceeds the maximum amount, replace the dual-mass flywheel. (See CLUTCH UNIT REMOVAL/INSTALLATION [C66M-R].)
Dual-mass flywheel guide pin projection maximum amount
11.0—12.0 mm {0.434—0.472 in}
6. Using a dial indicator, measure the dual-mass flywheel runout.
If it exceeds the maximum runout, replace the dual-mass flywheel. (See CLUTCH UNIT REMOVAL/INSTALLATION [C66M-R].)
Dual-mass flywheel maximum runout
1.5 mm {0.059 in}
7. Remove the dual-mass flywheel. (See CLUTCH UNIT REMOVAL/INSTALLATION [C66M-R].)
8. Visually inspect the dual-mass flywheel for crack.
If there is any crack, replace the dual-mass flywheel. (See CLUTCH UNIT REMOVAL/INSTALLATION [C66M-R].)
9. Visually inspect the ring gear on the dual-mass flywheel for damage.
If there is any damage, replace the dual-mass flywheel. (See CLUTCH UNIT REMOVAL/INSTALLATION [C66M-R].)
10. Visually inspect the surface that contacts the clutch disc for scratches, nicks, and discoloration.
If there is any malfunction, replace the dual-mass flywheel. (See CLUTCH UNIT REMOVAL/INSTALLATION [C66M-R].)
NOTE:
Correct slight scratches and discoloration using sandpaper.
11. Visually inspect for grease leakage between the primary mass and secondary mass.
If there is grease leakage, replace the dual-mass flywheel. (See CLUTCH UNIT REMOVAL/INSTALLATION [C66M-R].)