This engine was based on the 350-cubic inch 5.7-liter V8 small block Chevy engine. The Base EngineĬhevy gave its 4.3-liter V6 a numerical designation of '4300.' This engine was built as a 90-degree Vortec engine that displaces 4,300 cubic centimeters or 262.3 cubic inches. THe fuel injector unit is an easy change, the intake is more involved but can be done if your mechanically inclined and have the proper tools and torque specs. But that's no different than any other engine. These are the two most common issues with the 4.3 s that I know about and have seen, other stuff pops up hear and there, like sensors etc. But the current identification method was not always the same. While the answer was coded inside the serial number and engine identification all along. This engine is the mainstay of the Chevy line of light trucks and vans.Ĥ.3L (Gen II 2bbl) F601127-F0 4.3, Last of non-vortec in the pipeline 4.3LX (Gen II 4bbl) F601127-F8 4.3, Last of non-vortec in the pipeline. The idea was to blend fuel and air more efficiently in the chamber, producing more power. The technology produces a vortex or mini-tornado inside the combustion chamber. The engine is based on what General Motors calls Vortex technology. The engine boasted 155 horsepower when it first appeared. The 4.3-liter Vortec Chevy V6 was the first Vortec engine ever made in 1986 and was used in GMC and Chevy trucks.
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