Crankshaft Gear/Sprocket: Service and Repair

REMOVAL
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.

Figure 60-Crankshaft Sprocket-Removal:

2. Remove crankshaft sprocket by installing the crankshaft damper bolt and using Special Tool 1023. Remove sprocket using care not to rotate the crankshaft.

INSTALLATION

Figure 61 Crankshaft Sprocket - Installation:

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

Figure 62 Crankshaft Sprocket Depth Measurement:

2. Verify that crankshaft sprocket is installed to proper depth by measuring from sprocket outer face to end of crankshaft. Measurement should read: 39.05 ± 0.50 mm (1.5374 ± 0.002 inch).
3. Install primary timing chain.