GM 4.3L

Download Spec Sheet

  • Type: 90° 4.3L V6
  • Displacement:
    262 cid (4294.18 cc)
  • Compression Ratio: 9.4:1
  • Valve Configuration: Pushrod Actuated Overhead Valves
  • Manufactured:
    Tonawanda, New York
  • Valve Lifters: Hydraulic Roller
  • Bore X Stroke: 4.00 X 3.48 in (101.60 X 88.39 mm)
  • Main Bearing Caps: 2-Bolt
  • Balance Method: External
  • Intake Manifold: 2-BBL, IAFM
  • Rear Oil Seal: Full Circle
  • Fuel Delivery: Electronic Mixer
  • Oil Pan Capacity: 4.5 qt with filter
  • Fuel Types: LPG or NG
  • Engine Rotation: Clockwise (from the front)
  • Paint Protection: Completely component painted
  • Horsepower: 105hp @ 3000 rpm (LPG/NG)
  • Torque: 197 lb-ft @ 2500 rpm (LPG/NG)
  • Shipping Weight: 434 lb (197 kg)
  • Designed to work with liquid propane gas and natural gas.
  • Roller valve lifters for reduced friction and improved fuel economy.
  • Nodular iron crankshaft has undercut and rolled fillets for durability.
  • Counter-rotating balance shaft for smooth performance and low noise.
  • Engine comes completely component painted.
  • Composite rocker arm cover and front cover for noise reduction.
  • World-class engine sealing system for superior leak protection.
  • High Voltage Switch (HVS) distributor and non-adjustable, variable spark coil are standard.
  • Cast aluminum oil pan for increased strength and noise reduction.
  • Common rear face on most GM Powertrain industrial engines for easy hookup with housing.


  • Block: Cast Iron
  • Cylinder Head: Cast Iron
  • Intake Manifold: Cast Iron
  • Crankshaft: Nodular Iron
  • Camshaft: Steel
  • Pistons: High Silicon Aluminum
  • Exhaust Seat: Induction Hardened


Standard Features

  • U.S. EPA-Certified and CARB-Compliant
  • (IEPR) Integrated Electronic Pressure Regulator
  • Electronic Throttle Body, Mixer and Fuel Lock
  • Integrated Electronic Governor
  • Electronic Throttle Control
  • 3-Way Catalytic Converter



  • Natural Gas, LPG/Propane or CNG
  • SAE Flywheel Housing and Flywheel
  • Inline or Side Load PTO Clutch's
  • Auxiliary Front Drive Pulleys
  • Radiators
  • Dry Type Industrial Air Cleaners
  • Sheet Metal Enclosures
  • Instrument Panels with Auto Shutdown Capabilities