Feb 24, 2024 · Throughout the decades that followed its inception, the Chevy 4.3L V6 — also called the Vortec 4.3 or Vortec 4300 — saw a series of changes to improve power output and efficiency and address...

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Mar 12, 2025 · Firing order: 1-6-5-4-3-2; EcoTec3 Dimensions. Bore: 99.6 mm (3.92 inches) Stroke: 92 mm (3.62 inches) Slight increase in stroke for better torque characteristics; Maximum engine speed: 5800 rpm; These dimensional changes reflect GM’s ongoing optimization of the engine for different applications and performance targets. 4.3 Vortec Fuel ...

Jan 29, 2021 · What made the 4.3L V6 such an enduring engine, and one that still today has thousands of dedicated enthusiasts working together to support a thriving community? The answer lies in GM's clever decision to build on its past success by bridging the old and the new in a simple, yet well-engineered solution.

Oct 11, 2021 · In short, the Chevy 4.3 V6 Vortec is considered one of the most reliable engines that have ever been made by General Motors (GM). It runs on a lot of mid size trucks and has been known to clock well over 300,000 miles based on many Chevy owner reviews.

Its phaseout marks the end of an era of Chevrolet small-block engine designs dating back to the 1955 model year. A new Generation V 4.3 L (262 cu in) V6 variant entered production in late 2013, based on the LT1 small block V8 and first used in the 2014 Silverado/Sierra 1500 trucks.

LB4 (1986-1995) is the best Chevy 4.3L V6 engine with a good power rating and simple design. In addition, it has a balanced shaft available in its last models and has good overall performance. Therefore, you can opt for the engine to upgrade your old SUV or pickup truck with good power and efficient performance.