C 3500 Truck 2WD V8-454 7.4L VIN J SFI (1999)
Fan Clutch: Service and Repair
REMOVAL PROCEDURE
1. Remove the upper fan shroud. Refer to Fan Shroud Replacement (Upper).
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Locate the yellow dot on the fan clutch hub.
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Mark the coolant pump pulley adjacent to the yellow dot.
2. Remove the nuts from the fan clutch hub.
3. Remove the fan and fan clutch from the coolant pump pulley.
4. Remove the bolts.
5. Remove the radiator fan from the fan clutch.
6. Inspect the mating surfaces of the coolant pump hub and the fan clutch hub for smoothness. Rework as needed in order to eliminate any burrs or
other imperfections.
INSTALLATION PROCEDURE
CAUTION: Do not use or attempt to repair a damaged cooling fan assembly. Replace damaged fans with new assemblies. An unbalanced
cooling fan could fly apart causing personal injury and property damage.
1. Install the radiator fan to the fan clutch.
NOTICE: Refer to Fastener Notice in Service Precautions.
2. Install the bolts.
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Tighten the bolts to 24 Nm (18 ft. lbs.).
3. Install the fan and clutch assembly to the coolant pump pulley. Align the yellow marks on the coolant pump pulley and the fan clutch hub.
4. Install the nuts.
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Tighten the nuts to 24 Nm (18 ft. lbs.).
5. Install the upper fan shroud. Refer to Fan Shroud Replacement (Upper).