Here's a look inside the GM Ecotec 1.4L LV7 SGE engine and how it works!

This engine was out of a 2020 Chevrolet Spark with barely 2,000km on it and is practically brand new. It features dual overhead cams with variable valve timing, port injection, aluminum heads, block, upper oil pan and even a metal valve cover!

The engine's overall design is simplistic yet economic, with a simple timing chain running from crank to cams, a variable oil pump, and an exhaust driven vacuum pump. Amenities like variable induction intake manifold are omitted, as the design intent here was to maximize fuel economy at a very low cost.

Overall while the engine's design is simple, the lubrication system is quite complex, with oil flowing through the camshafts and then back around to the hydraulic lifters on the intake side. There's a lack of gaskets used when sealing, as cheaper RTV is established, making it difficult to remove and reseal. Most importantly, the combustion chambers consisted of a lot of carbon buildup for only having 2000 km on it, which was not expected, in addition to the cam caps and camshaft showing excessive wear. This could be due to the thinner oil used from the factory, a lack of break-in time and the combustion cycle being used.

Skip to section in the video:
0:00 Introduction
0:54 Teardown
11:30 Analysis
19:50 Conclusion

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