GM High Value Engine
| High Value engine | |
|---|---|
2008 Chevrolet Impala 3.5 L engine cover
|
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| Overview | |
| Manufacturer | General Motors |
| Production | 2004-2011 |
| Combustion chamber | |
| Configuration | 60° V6 |
| Displacement |
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| Cylinder bore |
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| Piston stroke |
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| Cylinder block alloy | Cast iron |
| Cylinder head alloy | Aluminum |
| Valvetrain | Overhead valve |
| Compression ratio | 9.8:1 |
| Combustion | |
| Fuel system | Sequential multi-point fuel injection |
| Fuel type | |
| Oil system | Wet sump |
| Cooling system | Water-cooled |
| Output | |
| Power output | 196–240 hp (146–179 kW) |
| Torque output | 213–240 lb·ft (289–325 N·m) |
| Chronology | |
| Predecessor | |
| Successor | GM High Feature engine |
The High Value engine family from General Motors is a group of Cam in Block or "Overhead valve" V6 engines. They use the same 60° vee bank as the 60° V6 family they are based on, but the new 99 mm (3.9 in) bore required offsetting the bores by 1.5 mm (0.1 in) away from the engine centerline. These engines (aside from the LX9) are the first cam in block engines to implement Variable Valve Timing, and won the 2006 Breakthrough Award from Popular Mechanics for this innovation. For the 2007 model year, the 3900 engine features optional displacement on demand or "Active Fuel Management" which deactivates a bank of cylinders under light load to increase highway fuel economy. It was rumored GM would produce a 3-valve design, but that never came to be. These engines were produced primarily at the GM factory in Tonawanda, New York and at the Ramos Arizpe engine plant in Mexico. The assembly line for this engine was manufactured by Hirata Corporation at their powertrain facility in Kumamoto, Japan.
As of the 2012 model year, GM no longer sells these motors in any US market vehicles.
The LX9 3500 is an OHV engine based on the 3400 V6. It incorporates electronic throttle control. Bore is 94 mm (3.7 in), stroke is 84 mm (3.3 in) for a displacement of 3498 cc (213 cu in). A GM Press Release for the 2004 Malibu described the 3500 thus: "3.5-liter V-6, will debut in the 2004 Chevrolet Malibu. The engine offers improved performance and fuel efficiency, and runs smoother and quieter than earlier generation V-6 engines. The 3500 V-6 features an advanced powertrain control module, improved fuel injection system, a redesigned exhaust manifold and a new catalytic converter contribute to reduced emissions, as well as improved efficiency and performance characteristics. Improvements in cooling, sealing and the accessory drive system add to the engine's overall quality, reliability and durability." Power output ranges from 196 hp (146 kW) to 201 hp (150 kW), torque ranges from 213 lb·ft (289 N·m) to 221 lb·ft (300 N·m).
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