Crankshaft Gear/Sprocket: Service and Repair

TIMING CHAIN AND SPROCKETS
REMOVAL - CRANKSHAFT SPROCKET
1. Remove primary timing chain.

CAUTION: Use care not to turn crankshaft while removing crankshaft sprocket, as damage to valves and or pistons could occur.





2. Remove crankshaft sprocket by first installing the crankshaft damper bolt. Apply grease or equivalent to damper bolt head and position Special Tools 5048-1, 5048-6, and 8539 on sprocket and crankshaft nose (Fig. 119). Remove sprocket using care not to rotate the crankshaft.

INSTALLATION - CRANKSHAFT SPROCKET





1. Install crankshaft sprocket using Special Tools 6780-1 and 8179 (Fig. 124) until sprocket bottoms against crankshaft step flange. Use care not to rotate crankshaft.





2. Verify that crankshaft sprocket is installed to proper depth by measuring from sprocket outer face to end of crankshaft (Fig. 125). Measurement should read: 39.05 ± 0.50 mm (1.5374 ± 0.020 inch).
3. Install primary timing chain.