New GM EcoTec3 engine family for 2014 Silverado and Sierra pickups; direct injection, cylinder deactivation and CVVT
Green Car Congress
DECEMBER 13, 2012
To further enhance combustion, the intake and exhaust valve positions have been switched from previous versions, and the valves are now slightly canted toward the cylinder centerline. Also, the spark plug angle has been revised and the electrode is now closer to the center of the chamber to support optimal combustion.
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