Flywheel: Testing and Inspection

DUAL-MASS FLYWHEEL INSPECTION [L3 WITH TC]

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 dual-mass flywheel.





Note:
^ Correct slight scratches and discoloration using sandpaper.
^ Inspect the runout of the surface that contacts the clutch disc with the dual-mass flywheel installed to the crankshaft.

2. Inspect the dual-mass flywheel.
- Cracks
- Worn ring gear teeth
- Chipped or cracked ring gear teeth
- Surface that contacts the clutch disc for scratches, nicks, and discoloration.
^ If there is any malfunction, replace the dual mass flywheel.
3. Verify that the center of the dual-mass flywheel does not move.





(1) 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 with a new one.





4. Verify that the secondary mass rotates by 15 teeth or more. If it rotates by 15 teeth or more, replace the dual-mass flywheel.





5. Inspect for locating dowels touching the primary mass of the dual mass flywheel.

Caution: Make sure that the three locating dowels are installed.

^ If the locating dowels are touching the primary mass of the dual mass flywheel, replace the dual-mass flywheel with a new one.
6. Visually inspect the secondary mass.
^ If there is any damage, replace the dual-mass flywheel.





7. Visually inspect the ring gear on the dual-mass flywheel. If there is any damage, replace the dual-mass flywheel.





8. Inspect the welded area of the dual-mass flywheel for grease leakage. If there is grease leakage, replace the dual mass flywheel.





9. Inspect the dual-mass flywheel runout.
Dual-mass flywheel maximum runout [A26MR] 1.5 mm (0.059 in)
^ If it is more than the maximum specification, replace the dual-mass flywheel.





10. Inspect the dual-mass flywheel for the amount of guide pin projection. If not within the specification, replace the dual-mass flywheel.





11. Rotate the secondary mass left and right and verify that it rotates within a range of three teeth without resistance. If there is any malfunction, replace the dual mass flywheel.
12. Inspect the dual-mass flywheel for cracks. If there are cracks, replace the dual-mass flywheel.