50% of Uk Vehicles are now fitted with dual mass flywheels and damped flywheel clutches. These are essential components that not only provided a enhanced level of driveablity but also may reduce harmful torsional vibration that would otherwise be transmitted into the gearbox and driveline.
Its important to check every time you replace the clutch. If you fit a clutch to a worn flywheel it will completely destroy it.
First listen for
- Rattles and clonks during engine start up or turn off
- Excessive gear rattle
- Unusual noises
After removing the clutch from the vehical check the clutch for
- driven plate damage
- drive strap damage
Check the flywheel for
- friction face scored
- over heated/blueing
- stress cracks
- Grease loss
With the flywheel still fitted
- Rotate the secondary mass anti-Clockwise until pressure can be felt, then allow it to return
- zero the special tool gauge or mark the position of the secondary mass relative to the ring gear
- do the same in a clockwise,mark the flywheel position again count the ring gear teeth between the marks or read off the free play angle from the special tool
To check the bearing or brush for wear
- Gently measure the amount of rock at the outer edge of the secondary mass or on the special tool adaptor with a DTP.
Replace If movement is
- More than 1.6mm for a roller type bearing
- more thank 2.9mm for a bush type bearing