D 350 Pickup L6-359 5.9L DSL (1989)
Crankshaft Gear/Sprocket: Service and Repair
Remove the crankshaft gear using a heavy duty puller.
Remove all burrs and make sure the gear surface on the end of the crankshaft is smooth.
If removed, install a new alignment pin. Drive in the pin, leaving it protruding 1.60mm [0.063 inch] to 2.39mm [0.094 inch] above the crankshaft.
Heat the crankshaft gear for 45 minutes at a temperature of 121°C [250°F].
CAUTION: Do not heat the gear longer than 45 minutes.
