Vortec 4300 4.3L V6 (LU3) Engine Specs

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Vortec 4300 4.3L V6 (LU3) Engine

Vortec 4300 4.3L V6 (LU3) Engine Overview

Vortec 4300 4.3L V6 (LU3) Engine is assembled By General Motors company at Romulus, Michigan United State. This engine is replacing the Chevrolet 250 in light trucks.This Vortec 4300 4.3L V6 (LU3) engine also included on Chevrolet Small Blok Engine generation I-E. That actually it was consist of various engines 7 Model, they are:

Engine Name Engine Code Engine Type
Vortec 4300 LB4 V6
Vortec 4300 LB35 V6
Vortec 4300 LF6 V6
Vortec 4300 LU3 V6
Vortec 4300 LG3 V6
Vortec 5000 L30 V8
Vortec 5700 L31 V8

While the Chevrolet Small Block Engine is a is a series of automobile V6/V8 engines built by the Chevrolet Division of General Motors using the same basic small (for a V6/V8) engine block.  The first edition of Vortec 4300 4.3L V6 (LU3) Engine is launched in 1985 that also completed with throttle body injected.

Vortec 4300 4.3L V6 (LU3) Engine Specification

The  Vortec 4300 4.3L V6 (LU3) Engine is came with cast iron on block material and cylinder head material , while valve train of this engine is using overhead valve with two valves per cylinder , this Vortec 4300 4.3L V6 (LU3) Engine can produce power until 190 HP at 4400 Rpm and torque max on 250 lb-ft at 2800. Here they are detailed specification of Vortec 4300 4.3L V6 (LU3) Engine

Specs Item Specs
Engine Type Vortec 4300 4.3L V6
Engine Code LU3
Engine Electronic integrated into the dual microprocessor PCM
Displacement 4,299.8 cc (262.39 cu in)
Transmission Type 5 speed manual , 4 speed auto
Compression Ratio 9.2:1
Bore and Stroke (in.) 4.00 x 3.48
Valve configuration (pcs) two valves per cylinder
Valve Lifters variable valve timing
Champ type Double overhead cam (DOHC)
Fuel System multi-point fuel injection
Recommended Fuel Unleaded Fuel 87 octane
Emissions controls three-way catalytic converter, positive crankcase ventilation, evaporative collection system
Maximum engine speed 5600
Horsepower(SAE net@rpm) 195 hp (142kw) @ 4600 rpm
Torque (lb. ft. @ rpm) 260 lb ft/ 339 Nm @ 2800 rpm
Manifold  Material Composite
Exhaust manifold catalyst constructed
Engine block material cast iron
Cylinder head material cast iron
Ignition system composite distributor, platinum-tipped spark plugs, low-resistance spark plug wires
Features Roller Rocker ArmsHex Chrome free coatingsRegulated Voltage Control

Vortec 4300 4.3L V6 (LU3) Engine Applications

This Vortec 4300 4.3L V6 (LU3) Engine is use for following list vehicles application

  • Chevrolet Astro/GMC Safari (base models)
  • Chevrolet S10 Blazer / GMC S15 Jimmy
  • Chevrolet Express/GMC Savana (base models)
  • Chevrolet S-10/GMC Sonoma
  • Chevrolet Silverado/GMC Sierra (base models)
  • GMC Envoy
  • Isuzu Hombre (optional)
  • Oldsmobile Bravada (base model)

Vortec 4300 4.3L V6 (LU3) Engine

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