Clutch Assembly: Inspection
- Inspect clutch pressure plate diaphragm fingers for wear. Inspect clutch plate for oil or grease saturation, worn or loose facings, warpage, loose rivets at hub and broken springs. Also inspect for wear or rust on splines.
- Using a slide caliper, measure depth to rivet heads. Minimum rivet depth is 0.012" (0.3 mm). Using a dial indicator, check clutch plate runout. Maximum clutch plate runout is 0.0276" (0.700 mm). Inspect flywheel for cracks, heat damage, wear and scoring. Machine flywheel if scored or worn.
- Mount a dial indicator so tip of indicator is against outer clutch disc-to-flywheel contact surface of flywheel. Position pry bar between rear crankshaft flywheel mounting flange and engine block. Pry crankshaft fully rearward. Rotate crankshaft one complete revolution while noting variation of reading on dial indicator which indicates flywheel runout. Maximum allowable runout is .008" (.2 mm). DO NOT remove more then .045" (1.143 mm) of stock from flywheel.
- If runout exceeds specification, use a crisscross sequence to loosen flywheel bolts. Remove flywheel. Repeat runout reading procedure as in step 3 , except place dial indicator tip against crankshaft rear flange face. If crankshaft rear flange is cause of excessive runout, resurface crankshaft flange face or replace crankshaft. If flywheel is cause of excessive runout, resurface or replace flywheel.
- Check rear main seal for leakage. Inspect pressure plate for burn marks, scores, flatness and ridges. Install NEW clutch plate on transmission input shaft and ensure clutch plate slides freely.
- Rotate outer race of clutch release hub while applying pressure. If bearing rotation is rough, replace clutch release hub and bearing. Check for any surface scoring or burrs that may impede sliding motion of clutch release hub and bearing. Check for worn or damaged clutch release fork contact surfaces. Check clutch release fork for cracks or distortion, and replace if necessary.