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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Mechanical - 8.1L) >> Description and Operation >> Engine Component Description >> Crankshaft

Engine Component Description: Crankshaft

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The crankshaft is made of cast nodular iron. The crankshaft is supported by 5 crankshaft bearings. The crankshaft bearings are retained by the crankshaft bearing caps. The crankshaft bearing caps are machined with the engine block for proper alignment and clearance. The crankshaft bearing caps are each retained by 2 bolts and 2 studs. The number 5 crankshaft bearing at the rear of the engine block is the end thrust bearing. The 4 connecting rod journals, 2 rods per journal, are spaced 90 degrees apart. The crankshaft position (CKP) sensor reluctor ring is pushed onto the rear of the crankshaft. The CKP sensor reluctor is constructed of powdered metal. The reluctor ring has an interference fit onto the crankshaft and an internal keyway for correct positioning.