Inspect diaphragm spring wear which is in contact with a concentric slave cylinder bearing.
Check the clutch cover and disc surface for wear or cracks.
Check the clutch disc lining for slipping or oil marks.
Measure the depth from a clutch lining surface to a rivet. If the measured value is less than the specification below, replace it.
Clutch disc rivet depth (A): 0.3 mm (0.0118 in.)