Flywheel Runout Check
Flywheel Runout CheckSpecial Tool(s)
Special Tool(s):
NOTE: Do not clean the dual mass flywheel with any kind of fluid, use a dry cloth only.
NOTE: Do not clean the gap between the primary and secondary mass. Only clean the bolt connection surface and the clutch surface.
1. NOTE: The flywheel cannot be machined.
With the dual mass flywheel installed on the engine, inspect the dual mass flywheel surface for scoring, cracks, discoloration or damage. If any of these conditions exist, install a new flywheel.
2. With the dual mass flywheel installed on the engine, inspect the dual mass flywheel internal spring operation using the following Steps 3-5.
3. Install the special tool.
4. Using a suitable long screwdriver or bar, firmly rotate the secondary mass clockwise. The secondary mass should begin to engage the internal spring past the freeplay movement of 19 mm (0.750 inch) maximum. The secondary mass should continue to rotate and engage the internal spring with increasing spring pressure. If the secondary mass does not rotate, install a new dual mass flywheel.
5. Using a suitable long screwdriver or bar, firmly rotate the secondary mass counterclockwise. The secondary mass should begin to engage the internal spring past the freeplay movement of 19 mm (0.750 inch) maximum. The secondary mass should continue to rotate and engage the internal spring with increasing spring pressure. If the secondary mass does not rotate, install a new dual mass flywheel.
6. Using a suitable long screwdriver or bar, firmly rotate the secondary mass clockwise and counterclockwise until the dual mass flywheel friction control plate is centered between the secondary mass notches.
7. Inspect the dual mass flywheel friction control plate for damage or melting and install a new dual mass flywheel if necessary.
8. NOTE: The dual mass flywheel rotational freeplay inspection cannot be carried out if the friction control plate is off center or damaged.
With the dual mass flywheel installed on the engine, inspect the dual mass flywheel rotational freeplay using the following Steps 9-13.
9. Check that the dual mass flywheel friction control plate is centered between the secondary mass notches.
10. Place a reference mark on the secondary mass of the dual mass flywheel.
11. Using light hand pressure, rotate the secondary mass clockwise to the end of the freeplay. Place a reference mark on the primary mass of the dual mass flywheel, in line with the reference mark on the secondary mass.
12. Using light hand pressure, rotate the secondary mass counterclockwise to the end of the freeplay. Place a second reference mark on the primary mass of the dual mass flywheel, in line with the reference mark on the secondary mass.
13. Measure the rotational freeplay XX between the 2 reference marks on the primary mass of the dual mass flywheel. If the rotational freeplay exceeds 19 mm (0.750 inch), install a new dual mass flywheel.
14. Inspect the dual mass flywheel when removed from the engine and placed on a bench, using the following Steps 15-16.
15. NOTE: Blocks must be placed under the dual mass flywheel to make sure it is level and stable.
Remove the dual mass flywheel and place it on a firm and level surface.
^ Discard the dual mass flywheel retaining bolts and remove the special tool.
16. NOTE: Axial movement of the secondary mass flywheel is normal and the dual mass flywheel should not be discarded based on this movement.
Using a suitable dial indicator gauge and holding fixture, inspect the dual mass flywheel hub bush for wear and install new as necessary.
^ Place a dial indicator gauge at a point on the outer upper surface of the secondary mass.
^ Using light hand pressure, press downward at the opposite point on the outer upper surface of the secondary mass and note the deflection on the dial indicator gauge.
^ Repeat this measurement at 120 degree intervals around the dual mass flywheel and note any deflection. If the deflection exceeds 1.5 mm (0.060 inch) at any point, install a new dual mass flywheel.
17. Inspect the rear face of the engine block.
1 Make sure that the 2 engine dowel pins are correctly installed and are not damaged, install new dowel pins as necessary.
2 Inspect the upper and lower engine block rear face plates for damage or warping and install new plates as necessary.
3 Inspect the crankshaft flange for residual thread locking compound or rust, and clean as necessary.
18. Inspect the transaxle mounting face.
^ Make sure that the 2 dowel pin holes are not elongated or damaged.
19. Inspect the dual mass flywheel crankshaft mounting flange for residual thread locking compound or rust and clean as necessary.
20. NOTE: Install new dual mass flywheel retaining bolts.
Loosely install the dual mass flywheel.
21. Install the special tool.
22. Tighten the dual mass flywheel retaining bolts in the sequence shown to 112 Nm (83 ft. lbs.).
