Flywheel Inspection [A26MX-R]

CAUTION:

Do not rework the flywheel if it is distorted.
Do not clean the dual mass flywheel with any kind of fluid. Clean the 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.

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

Fig 1: Cleaning Flywheel With Sandpaper

Courtesy of MAZDA MOTORS CORP.

Inspect the 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 flywheel.
Inspect the flywheel for lateral movement.
1. Rotate the flywheel in either or both directions, or rock slightly on the axis in relation to the primary mass.
  - If there is any lateral movement, replace the flywheel with a new one.
    
    Fig 2: Inspecting Flywheel For Lateral Movement
    Courtesy of MAZDA MOTORS CORP.
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.

Fig 3: Rotating Flywheel

Courtesy of MAZDA MOTORS CORP.

Visually inspect the secondary mass.
- If there is any damage, replace the dual-mass flywheel.
Visually inspect the ring gear on the dual-mass flywheel.
- If there is any damage, replace the dual-mass flywheel.
  
  Fig 4: Inspecting Ring Gear On Dual-Mass Flywheel
  Courtesy of MAZDA MOTORS CORP.
Inspect the welded area of the dual-mass flywheel for grease leakage.
- If there is grease leakage, replace the dual-mass flywheel.
  
  Fig 5: Inspecting Welded Area Of Dual-Mass Flywheel For Grease Leakage
  Courtesy of MAZDA MOTORS CORP.
Inspect the dual-mass flywheel runout.
Dual-mass flywheel maximum runout

1.5 mm {0.059 in}
- If it is more than the maximum specification, replace the dual-mass flywheel.
  
  Fig 6: Inspecting Dual-Mass Flywheel Runout
  Courtesy of MAZDA MOTORS CORP.
Inspect the dual-mass flywheel for the amount of guide pin projection.
- If not within the specification, replace the dual-mass flywheel.
  
  Fig 7: Inspecting Dual-Mass Flywheel For Amount Of Guide Pin Projection
  Courtesy of MAZDA MOTORS CORP.
Rotate the secondary mass left and right and verify that it rotates within a range of three teeth without resistance.
- If there is any resistance, replace the dual-mass flywheel.
Inspect the dual-mass flywheel for cracks.
- If there are cracks, replace the dual-mass flywheel.
  
  Fig 8: Identifying Range Of Three Teeth
  Courtesy of MAZDA MOTORS CORP.