Clutch Assembly: Inspection

Check wear on facings of clutch disc by measuring depth of each rivet head. Minimum depth at any rivet is .012" (.30 mm). Maximum runout of clutch disc facing is .031" (.79 mm). Replace clutch disc if it is not within specifications.
Check diaphragm spring and pressure plate for wear and damage. If assembly is excessively worn or damaged, replace pressure plate. Check pilot bearing rotation. If bearing rotates roughly, replace bearing. Check release bearing for rough rotation. Replace bearing and hub as necessary.
Inspect flywheel runout. Maximum runout is .004" (.10 mm). If runout is excessive, replace flywheel. Clean flywheel and pressure plate of all oil, grease and metal deposits. Inspect for damage, cracks and warpage. Slight surface scoring can be removed using sandpaper. Replace or repair as necessary.
Using calipers, inspect diaphragm spring for depth and width of wear. See Fig 1. Maximum depth is .024" (.060 mm). Maximum width is .197" (5.0 mm).

Fig 1: Checking Diaphragm Spring Depth & Width Wear