K 2500 Truck 4WD V8-454 7.4L VIN J SFI (1997)
Crankshaft: Description and Operation
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The crankshaft is made of cast nodular iron.
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The crankshaft is supported by five crankshaft bearings.
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The crankshaft bearings are retained by the crankshaft bearing caps, which are machined with the block for proper alignment and clearances.
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The engine crankshaft bearing caps are retained by four bolts each. The number five crankshaft bearing at the rear of the engine is the end thrust
bearing.
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The four connecting rod journals (two rods per journal) are spaced 90° apart.
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The crankshaft position sensor reluctor ring is pushed onto the front of the crankshaft.
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The crankshaft position sensor reluctor ring has four lugs used for crankshaft timing and it is constructed of powdered metal. The reluctor ring has
an interference fit onto the crankshaft and an internal keyway for correct positioning.
