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6.2L fitted to a 1987 HMMWV. The original 6.2 L (379 cu in) diesel V8 was introduced in 1982 for the Chevrolet C/K and was produced until 1993. The 6.2L diesel emerged as a high-fuel-economy alternative to the V8 gasoline engine lineup, and achieved better mileage than Chevrolet's 4.3L V6 gasoline engine of the 1980s, at a time when the market was focused on power rather than efficiency.
Although this engine displaces 6.2 litres, it is marketed as the "6.3" to commemorate Mercedes' famed 6.3 L M100 engine, its first production V8. The engine uses a bore and stroke of 102.2 mm × 94.6 mm (4.02 in × 3.72 in).
The 6.2 L (379 cu in) V8 is the main variant of the Boss engine. The V8 shares design similarities with the Modular Engine family such as a deep-skirt block with cross-bolted main caps, crankshaft-driven gerotor oil pump, overhead cam valve train arrangement, and bellhousing bolt pattern.
Also for 2008, a new 393 hp (293 kW) 6.2 L V8 gasoline engine replaced the previous 325 hp (242 kW) 6.0 L, with a new 6L80-E six-speed automatic transmission, replacing the 4L65-E four-speed automatic. Hummer launched a special 2009 Black Chrome Limited Edition featuring a new paint color, Sedona Metallic.
The 6.0 L is a larger version of the LS engine. 6.0 L blocks were cast of iron, designed to bridge the gap between the new small blocks and big blocks in truck applications. There were two versions of this engine: LQ4 and LQ9, the latter being more performance oriented.
In 1991, the Oldsmobile 307 was replaced with a 305 cu in (5.0 L) throttle body fuel-injected small-block Chevrolet L03 V8, which was also found in Chevrolet's Caprice, C/K light trucks, and G-series vans. In 1993, the 180 hp (134 kW) 350 cu in (5.7 L) L05 V8 became standard in the newly-renamed Cadillac Fleetwood.
This was Chevrolet's second 4.3L power plant; four other Chevrolet engines displaced 4.3L: the Vortec 4300 (a V6 based on the Chevrolet 350 cu in (5.7 L), with two cylinders removed), the original 265 cu in (4.3 L) V8 in 1954, a bored version of the stovebolt-era 235 inline six displacing 261 cu in (4.3 L), and a derivative of the Generation II ...
6.2 and 6.5 L Detroit Diesel The Duramax V8 engine is a family of 6.6-liter diesel V8 engines produced by DMAX , a wholly owned subsidiary of General Motors in Moraine, Ohio . The Duramax block and heads are supplied from reliable vendors of General Motors.