GM High Value engine

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GM High Value V6 Engines
Manufacturer: General Motors
Production: 2005–
Predecessor: GM 60-Degree V6 engine
Class: 60° OHV V6
Engine: 3.5 L (3498 cc)
3.5 L (3510 cc)
3.9 L (3880 cc)
Similar: Ford Vulcan engine
Chrysler 3.3 engine

The High Value engine family from General Motors is a group of Cam in Block or "Pushrod" V6 engines. They use the same 60° vee bank as the 60° V6 family they are based on, but the new 99 mm bore required expanding the bore spacing by 1.5 mm. These engines 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 model year 2007 the 3900 engine features optional displacement on demand, or what is now called "Active Fuel Management" which can deactivate one bank of cylinders under light load to increase economy. Another future addition is a rumored 3-valve design. These engines are produced primarily at the GM UAW factory in Tonawanda, New York.

Contents

[edit] 3.5

[edit] LX9

The LX9 3500 is an OHV engine based on the 3400 V6. It incorporates electronic throttle control. Bore is 94mm, stroke is 84mm for a displacement of 3498cc (213 in³). 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 to 201 hp, torque ranges from 213 lb-ft to 221 lb-ft. The 2006 model year will be the last year for this engine as it will be replaced by the 3.5L LZ4 V6 for 2007.

It was used in the following vehicles and model years:

[edit] LZE

The LZE 3500 is an OHV flexible fuel engine based off of the 3.9 L LZ9 V6 (it can use either plain gasoline or 85% Ethanol, E85) and includes continuously variable valve timing on both intake and exhaust valves. It has a cast iron block and aluminum heads. Bore is 99mm, stroke is 76mm for a displacement of 3510cc (214 in³). Output is 211 hp (156.5 kW) at 5800 RPM and 214 ft·lbf (298 N·m) at 4000 RPM.

Output for model year 2007 is upped to horsepower of 224 @ 5800 rpm and torque of 220 @ 4000 rpm.

Applications:

[edit] LZ4

The LZ4 3500 is an OHV engine based off of the 3.9 L LZ9 V6. It was introduced for the 2006 model year in the Chevrolet Impala and Monte Carlo. It includes continuously variable valve timing on both intake and exhaust valves. It has a cast iron block and aluminum heads. Output is 211 hp (156.5 kW) at 5800 RPM and 214 ft·lbf (298 N·m) at 4000 RPM. Bore is 99mm, stroke is 76mm for a displacement of 3510cc. Horsepower rating changed for the 2007 model year to Horsepower: 224 @ 5800 rpm and Torque: 220 @ 4000 rpm. The Chevrolet Malibu, Pontiac G6, and Saturn Aura are to be equipped with this engine for 2007 (previously the Malibu and G6 had the non-VVT 201hp 3.5 L LX9).

Applications:

Note: GM often refers to this engine in its literature as a "3.5L V6 with Variable Valve Timing".

[edit] 3.9

Bore remains at 99 mm (3.9 in) but stroke is increased to 84 mm (3.31 in) for a displacement of 3880 cc (237 in³).

[edit] LZ8

The new LZ8 3900 features Variable Valve Timing, a new feature on a pushrod engine, roller rocker arms and has a variable length intake manifold. It is expected to produce 240hp (179kW) and 241ft·lb (332Nm) torque, with a wide torque curve. A 3-valve version may be introduced later.

This engine is used in the following vehicles:

[edit] LZ9

The LZ9 3900 has the same VVT technology as the LZ8. The 2007 model year introduces the Active Fuel Management system (formerly known as Displacement on Demand), which can turn off a bank of cylinders under a light load for increased fuel economy. Output is 242 hp (179 kW) and 242nbsp;ft·lbf (332 N·m).

Applications:

[edit] See also

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