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The High Value engine family from General Motors is a group of cam-in-block or overhead valve V6 engines.These engines feature cast iron blocks and aluminum heads, and use the same 60° vee bank as the 60° V6 family they are based on, but the new 99 mm (3.90 in) bore required offsetting the bores by 1.5 mm (0.059 in) away from the engine center line.
Other components like the timing chains, fuel injectors, intake valves, and fuel pump have also been updated. They also updated the cam phasing and variable valve timing system compared to the LLT. Power and torque are up slightly from the LLT. The compression ratio is 11.5:1. The LFX also features E85 flex-fuel capability.
The GM Ecotec engine, also known by its codename L850, is a family of all-aluminium inline-four engines, displacing between 1.2 and 2.5 litres.Confusingly, the Ecotec name was also applied to both the Buick V6 Engine when used in Holden Vehicles, as well as the final DOHC derivatives of the previous GM Family II engine; the architecture was substantially re-engineered for this new Ecotec ...
The General Motors 60° V6 engine family is a series of 60° V6 engines produced for both longitudinal and transverse applications. All of these engines are 12-valve cam-in-block or overhead valve engines, except for the LQ1 which uses 24 valves driven by dual overhead cams. These engines vary in displacement between 2.8 and 3.4 litres (2,837 ...
The exception being the 1997 Calibras, which due to unavailability of C25XE engine blocks, were produced using the X25XE block but without modifications to the top end of the engine, and without addition of EGR. The X25XE also benefitted from a higher-volume oil pump. Firing order is 1-2-3-4-5-6. The breakdown of the engine name [1] is as follows:
The 4.3 L (262.5 cu in) LV3 V6 is an all-new engine announced by GM at the end of 2012. GM considers this a new engine design which inherits from its predecessors its displacement, 2-valve pushrod valvetrain, 90-degree cylinder angle, and 4.4 in (111.8 mm) bore centers.
This combination raised the compression from 9.5:1 to 10.0:1. The L33 also used a unique camshaft not shared with any other engine, with the specifications at .050 duration being: 193 duration, .482 lift, 116 LSA. As a result, power increased by 15 hp (11 kW), to 310 hp (230 kW) and 335 lb⋅ft (454 N⋅m).
A mechanical refresh for 2012 brought the revised 3.6-liter V6 (with variable valve timing) to all trims as the single engine offering, paired with an updated 6-speed automatic transmission. The new combination once again pushed the Impala to a 300-horsepower rating, and continued with the Impala Limited from 2014 to 2016.