Vortec 4.3 L

  • Lead-free main bearings and balance shaft rear bearing.
  • Integral Air Fuel Module (IAFM) inlet manifold with port fuel injection available.
  • Cracked powder metal connecting rod to more accurately position the cap to the rod during engine assembly. A high-flow cylinder head with straighter intake ports and a higher compression ratio delivers impressive horsepower.
  • High-silicon cast aluminum pistons offer excellent durability.
  • Roller valve lifters, roller rocker arms and true roller timing chain for reduced friction and improved performance.
  • Composite rocker arm covers for reduced noise and resistance to corrosion.
  • Cylinder case has brass water jacket core support plugs for resistance to corrosion.
  • Water pump is effective rotating in either a clockwise or counterclockwise direction.
  • Nodular iron crankshaft has rolled fillets for increased strength.
  • Water pump casting eliminates internal bypass.
  • Investment cast rocker arms.
  • 58X crankshaft position encoder with digital sensor to ensure accurate ignition timing throughout the operating range.
Información Técnica
Type 4.3L V-6 (Gen 1e)
Displacement 262 cid (4.3L cc)
Engine Orientation Longitudinal
Compression Ratio 9.4:1
Valve Configuration Overhead Valves (2 valves per cylinder)
Valve Lifters Hydraulic Roller
Firing Order 1-6-5-4-3-2
Bore x Stroke 101.60 x 88.39 mm
Bore Center 111.76 mm
Bore Area 486.44 cm2
Fuel System N/A (L35) or Port Fuel Injection (LG3)
Fuel Type Regular Unleaded
Horsepower 226 hp (169 kW) @ 4800 rpm
Torque 268 lb-ft (363 Nm) @ 4000 rpm
Vortec 4.3 L
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