History

• The 262ci V-6 was introduced in 1985, and is the largest in a succession of V-6 engines produced by GM. Chevy presented the Vortec 4.3L engine in 1996 with the name implying technology applied to improve airflow.
  
  

Configuration

• The engine has an overhead valve (OHV) 90 degree V-6 configuration; that is, the cylinders are placed in a "V" shape--three on each side--with a spread of 90 degrees. This is the same V configuration as the GM V-8 engines.
  
  

Displacement

• The 4.3L Vortec V-6 (262ci) achieves its displacement by using a cylinder bore of 101.6 mm (4 inches) and a stroke of 88.4 mm (3.48 inches). This is the same bore/stroke used in the 350ci V-8 engine.
  
  

Vortec Design

• Vortec cylinder heads promote turbulence (swirl) in the engine's cylinder from modifications to the intake port, and through a redesigned combustion chamber. This has the effect of improved efficiency and power output.
  
  

Applications

• While Vortec design has been used in GM V-8 engines as well, the 4.3L Vortec V-6 engine was used in GM and GMC mid-size trucks, vans, and SUVs and also in light-duty full-size trucks and vans.