C 2500 Suburban 2WD V8-454 7.4L VIN J SFI (1998)
Crankshaft Gear/Sprocket: Service and Repair
REMOVAL PROCEDURE
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Tools Required
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J 28509-A Crankshaft Sprocket Remover
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J 41371 Reluctor Wheel Remover.
1. Open the hood.
2. Disconnect the battery negative cable from the battery.
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
3. Remove upper fan shroud from the radiator.
4. Rotate the engine until the timing marks on the crankshaft balancer and the engine front cover are on TDC.
5. Remove the drive belt from the vehicle.
6. Raise the vehicle and support with safety stands.
7. Remove the lower fan shroud from the radiator.
8. Remove the crankshaft balancer from the crankshaft.
9. Remove the water pump from the engine block.
10. Remove the engine front cover from the engine block.
IMPORTANT: If the crankshaft position reluctor ring is removed, a new crankshaft position reluctor ring sensor must be installed.
11. Aligned the timing marks on the camshaft and crankshaft gears.
12. Use the J 41371 to remove the crankshaft reluctor ring from the crankshaft.
13. Remove the camshaft sprocket retaining bolts.
14. Remove the timing chain and camshaft sprocket.
