It requires fewer parts, is lighter than a conventional system, helps lower engine compartment temperatures and helps the engine warm up faster. The turbocharger size was chosen with an emphasis on low speed torque and throttle response. Integrated Turbocharger And Exhaust Manifold: the 1.4L Turbo Ecotec LUJ/LUV uses a unique, integrated turbocharger and exhaust manifold.Variable Valve Timing: the dual-overhead camshaft arrangement of the engine employs dual, continuously variable cam phasing to adjust the opening and closing timing of the engineвЂ™s valves for optimal performance, fuel efficiency, and emissions across the rpm band.Sodium-filled exhaust valves are designed for the higher combustion temperatures of the turbo system. The headвЂ™s intake port design optimizes performance, efficiency and emissions by promoting greater charge motion of the intake air and a more complete burn of the air/fuel mixture. Cylinder Head: an aluminum cylinder head with dual-overhead camshafts and four valves per cylinder is used on the 1.4L Turbo Ecotec.Structural Oil Pan: an aluminum oil pan is designed as a key structural component of the engine, adding stiffness that helps improve vibration characteristics.The engineвЂ™s turboвЂ™s variable-flow pump changes its capacity based on the engineвЂ™s demand for oil, thereby preventing energy consumption to pump oil that is not required for proper engine operation. Rather than the linear operation of a conventional fixed-flow pump, the LUJ/LUV uses a crankshaft-driven oil pump that matches the oil supply to the engine load. Variable-Flow Oil Pump: the 1.4L Turbo Ecotec LUJ/LUV uses a unique variable-flow oiling system that helps maximize fuel efficiency.The connecting rods are forged steel and the lightweight, hypereutectic pistons are designed with a thicker crown area and a unique ring pack to withstand the boost pressure and heat generated by the turbo system. Rotating Assembly: with a reinforced, solid-cast crankshaft, the 1.4L Turbo Ecotec offers strength and stiffness, particularly at higher rpm, to support the boosted cylinder pressure of the turbo system.

To minimize weight, it features hollow-frame construction, making it about 20 percent lighter than a conventional casting. The block offers excellent thermal properties that suit the cylinder pressure and loads generated by a turbocharger system. Cylinder Block: the LUJ/LUVвЂ™s cylinder block is made of strong gray cast iron, with five reinforced main bearings.The engine incorporates numerous mass-reducing features, including a cast iron block with a hollow frame structure, hollow-cast camshafts, and a plastic intake manifold. The turbocharger in the LUJ/LUV is integrated within the exhaust manifold for reduced weight and greater packaging flexibility in smaller vehicles. The engineвЂ™s power-boosting advantage comes from forcing greater airflow into the engine, and its pressurized charge packs more air into the cylinders, allowing them to process the air and fuel of a larger engine for momentary driving situations. The wide rpm range for maximum torque helps the engine deliver a surprisingly spririted driving experience and performance. The 1.4L Turbo Ecotec LUJ/LUV is part of GMвЂ™s small-displacement, power-dense four-cylinder engines.

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