GM 3.0 Liter V6 LFW Engine

The LFW 3.0L V6 VVT is part of GM’s acclaimed global family of High Feature V6 engines, which were developed for applications around the world. The High Feature V6 engines apply the most advanced automotive engine technology available, from state-of-the-art casting processes to full four-cam phasing. The 3.0L LFW engine delivers a market-leading balance of specific output, high torque over a broad rpm band, fuel economy, low emissions and first-rate noise, vibration and harshness control.

Engine highlights include:

• Aluminum Engine Block And Cylinder Heads: engine block and cylinder heads are cast from A319 aluminum alloy. This aluminum-intensive construction means less weight and greater efficiency than conventional cast-iron engines; less weight translates to improved vehicle fuel economy.
• Direct Injection: direct injection moves the point where fuel feeds into an engine closer to the point where it ignites, enabling greater combustion efficiency. It fosters a more complete burn of the fuel in the air-fuel mixture, and it operates at lower temperature than conventional port injection.
• Dual Overhead Cams with Four Valves per Cylinder and Silent Cam Drive: four-valves-per-cylinder with inverted-tooth chain cam drive contributes to the smoothness and high output of the 3.0L V6 LFW. Overhead cams are the most direct, efficient means of operating the valves, while four valves per cylinder increase airflow in and out of the engine.
• Variable Valve Timing: Variable Valve Timing (VVT), or cam phasing, helps the 3.0L V6 LFW deliver optimal performance, efficiency and emissions. It allows linear delivery of torque, with near-peak levels over a broad rpm range, and high specific output (horsepower per liter of displacement) without sacrificing overall engine response, or driveability.
• Composite Intake Manifold: the upper intake manifold for the 3.0L V6 LFW is made from composite material and provides mass savings over an aluminum manifold, with a carefully-designed structure that helps ensure quiet engine operation.
• Fully Isolated Composite Camshaft Covers: the cam covers are made of thermoset, glass-filled polyester composite, a material that weighs less than the cast aluminum used on most premium engines and more effectively dampens noise.
• Integrated Exhaust Manifold: the 3.0L V6 LFW engine features integrated exhaust manifolds with the cylinder heads, eliminating the need for separate exhaust manifolds. The benefits include reducing the mass of the engine for improved fuel economy and faster catalytic converter light off, resulting in reduced emissions.