All of these components work both well for improving engine efficiency and extending long-term engine durability. Like 5.3L V8 L83, this engine also got piston oil jets/squirters, variable-displacement oil pump (wet sump), and nodular main bearing caps. The rotating assembly features a forged-steel crankshaft, I-beam powder-metal connecting rods (6.098 in long), and cast aluminum domed pistons optimized for direct injection. The 92 mm (3.622 in) stroke is the same across all Gen5 small block engines. The 6.2-liter engine gets its displacement from the increased bore of 103.25 mm (4.065 in). By the way, the engine block is similar to the 5.3-liter EcoTec3 version. They use a 90-degree aluminum cylinder block with cast-in iron cylinder liners. As was said, the GM 6.2 L86 and L87 are all aluminum engines.
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