Detroit Diesel V8 engine
| General Motors V8 Diesel | |
|---|---|
 |
|
| Overview | |
| Production | 1982-1993 and 1992-current |
| Combustion chamber | |
| Displacement | 6.2L/379cid and 6.5L/395cid |
| Cylinder bore | 6.2L: 3.98 in (101 mm); 6.5L: 4.06 in (103 mm) |
| Piston stroke | 6.2L: 3.80 in (97 mm); 6.5L: 3.82 in (97 mm) |
| Cylinder block alloy | Iron |
| Cylinder head alloy | Iron |
| Valvetrain | 16 OHV |
| Compression ratio | 21.5:1, Marine 18:1 |
| Combustion | |
| Turbocharger | Borg-Warner GM-X series, also available naturally aspirated |
| Fuel system | 1993 And older-Mechanical rotary pump. 1994 And newer-Electronic rotary pump |
| Fuel type | Diesel |
| Chronology | |
| Predecessor | LF9 350 cu in (5.7 L) diesel |
| Successor | Duramax V8 engine |
General Motors introduced a line of Diesel V8 engine engines for their C/K pickup trucks in 1982. This engine family was produced by GM through 2000, when it was replaced by the new Duramax line. AM General's subsidiary General Engine Products (GEP) still produces a military variant of this engine for the HMMWV.
The General Motors light-truck 6.2 and 6.5 L Diesel engines were optional in all 1982 through 2000 full-size GM pickups, SUVs, and vans: Chevrolet C/K pickup trucks, Chevrolet Suburban, Chevrolet K5 Blazer and its replacement Chevrolet Tahoe, full-size Chevrolet Van and its successor Chevrolet Express, as well as motor homes. The engine was standard on AM General military HMMWV, civilian Hummer H1, and the 1980s GM military Commercial Utility Cargo Vehicle.
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 6.2 L diesel emerged as a high-MPG alternative to the V8 gasoline engine lineup, and achieved better mileage than the General Motors 4.3 L V6 gasoline engines of the 1980s, at a time when the market was focused on mileage more than power. However, it was designed to easily install in place of the gasoline V8, using the same mounting and attachments for transmissions as all GM truck engines. Overall weight for the complete engine is slightly heavier than the 7.4 L gasoline engine.
The 6.5 L (395 cu in) version was introduced in 1992 to replace the 6.2. Most 6.5s are equipped with a turbo. This engine was never meant to be a power and torque competitor with Ford/International and Dodge/Cummins, but rather a simply designed workhorse engine that made credible power, achieved decent fuel economy and met emissions standards in half-ton trucks. The Duramax 6600 replaced the 6.5 in light trucks beginning in 2001 and the C3500HD medium duty cab and chassis (replaced by C4500 Kodiak/Topkick) and vans beginning in 2003, but the 6.5 (6500 Optimizer) is still produced by AM General for the HMMWV.
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Wikipedia