Remove torsional damper with special tool 5740755 (Figure 2-10).
Remove and inspect crankshaft keys. Replace keys if worn, chipped, or distorted.
Figure 2-9: Torsional Damper and Crankshaft Pulley
Figure 2-10 Torsional Damper Removal
Check seal contact surface of damper. Surface must be clean and smooth to avoid damaging timing cover seal. Smooth surface with 180 grit emery if necessary. Then polish surface with 220 grit emery coated with engine oil.
Inspect condition of front cover seal. Replace seal if worn, cut, cracked, or hardened. Use pry tool to remove oil seal and special tool 5740754 to install new seal.
Install crankshaft keys. Be sure keys are fully seated in crankshaft key slots.
Lubricate crankshaft nose, front cover seal, and seal surface of torsional damper with engine oil.
Install torsional damper on crankshaft. Be sure crankshaft keys are not displaced during damper installation.
Install damper washer and bolt. Tighten bolt to 140-160 lb-ft (190-217 N•m) torque.