Chevy 4.3L V6 Remanufactured Engine – 1998-1999
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Chevy 4.3L V6 Remanufactured Engine – 1998-1999

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SKU: 1154
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Description

High-nickel cast iron block architecture absorbs extreme combustion pressure spikes while graphite-coated hypereutectic aluminum pistons resist thermal expansion during grueling vocational work truck operation in this Chevy 4.3L V6 Remanufactured Engine. Engineered for 1998 to 1999 commercial vans and pickups, this Vortec platform integrates hydraulic roller valvetrains with composite front timing covers.

The seasoned gray iron cylinder block receives precision deck milling to Ra 30 micro-inch finish, securing leak-free head gasket mating. A nodular iron crankshaft spins on bi-metal aluminum bearings, driving forged steel connecting rods and graphite-coated hypereutectic pistons. Cylinder bores undergo diamond plateau honing for reduced ring friction under high loads. Bare block dry weight equals 425 lbs with a 4.5-quart oil pan capacity.

Key Features of Chevy 4.3L

Municipal utility fleets buy Chevy 4.3L remanufactured engine packages to keep municipal service trucks operational through severe weather seasons. Every remanufacturing stage follows strict AERA guidelines to restore factory mechanical integrity and operating balance across the valvetrain.

  • Vortec cylinder heads feature high-velocity intake ports for rapid throttle response under load.
  • Composite timing cover prevents front seal corrosion and accommodates digital crank sensor feeds.
  • Internal balance shaft neutralizes cyclic vibrations to extend transmission front pump bushing life.
  • Hydraulic roller camshaft profiles generate consistent pulling power from idle to highway speeds.
  • Chevy 4.3L high-pressure oil pump channels 55 PSI continuous lubrication to rod journals.
  • Centerbolt valve cover configurations eliminate nuisance oil leaks during long commercial routes.
  • Factory one-piece rear main seals eliminate crankcase oil leakage onto transmission bell housings.
  • Hardened exhaust valve seats resist thermal seat erosion under unleaded fleet fuel use.

Vortec Valvetrain Thermal Operational Specs

Oil pressure holds 20 PSI at hot idle, increasing to 50 to 60 PSI at 2,500 RPM cruise. Regulated cooling system parameters maintain engine coolant between 185°F and 200°F. Dyno evaluation confirms 190 continuous horsepower at 4,400 RPM and 250 lb-ft torque at 2,800 RPM. An 9.2:1 compression ratio produces 175 to 185 PSI dynamic cranking compression. Radiator cooling circuits dissipate 3,650 BTU/min heat during High-Mileage Freight cycles across regional interstate highway systems.

Composite Cover Crankshaft Interface Dimensions

The one-piece rear main crankshaft features a 6-bolt flexplate mounting flange with a 3.00-inch circle. The front snout diameter measures 1.248 inches with a precision keyway for cast iron balance dampers. Dial indicators confirm crankshaft endplay between 0.003 and 0.007 inches across thrust surfaces. Pilot hole diameter fits standard light truck automatic torque converters.

Roller Valvetrain Priming Maintenance Protocols

Pressure prime all internal oil galleries with approved SAE 5W-30 mineral oil before initial crankcase ignition. Ensure the cooling system is vacuum bled to avoid air locks inside the intake manifold passages. Not engineered for high-boost turbocharger conversions exceeding 5 PSI, marine salt water use, or vehicles exceeding 9,500 lbs gross weight.

  • Check engine crankcase oil level and transmission fluid each shift.
  • Inspect distributor ignition timing and vacuum hose routing every 50 operating hours.
  • Replace crankcase motor oil and spin-on lubricant filter every 3,000 miles.

Commercial Warranty Crate Hardware Manifest

Protected by our 3-Year / 100,000-Mile commercial fleet warranty covering parts and block casting soundness. The durable shipping crate holds the remanufactured long block engine, high-volume oil pump, oil pump pickup screen, complete engine install gasket kit, pre-lube instructions, and an engine dynamometer test document.

Chevy 4.3L V6 Remanufactured Engine – 1998-1999 Additional Info

Weight325 lbs
Dimensions36 × 36 × 36 in
Important NotesBlock Cast #9090M
Engine VIN CodeW
Block Casting14099090M
Head Casting772,140
Crank Casting255
Casting LocationV6,REAR OF BLOCK, TOP OF BELLHOUSING MOUNT
Body Style262
Fuel TypeGasoline
Displacement4.3L
Number of Cylinders6
Block TypeV
Head TypeOHV
Product TypeEngines
Number of Valves12

Chevy 4.3L V6 Remanufactured Engine – 1998-1999 Vehicle Fitment

YearMakeModelEngineNote
1998 - 1998ChevroletC1500V6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 1998ChevroletK1500V6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 1998GMCC1500V6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 1998GMCK1500V6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 1999ChevroletP30V6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 1999GMCJimmyV6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 1999GMCP3500V6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 1999IsuzuHombreV6 4.3L 4294ccCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 2000ChevroletAstroV6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 2000ChevroletBlazerV6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 2000ChevroletExpress 1500V6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 2000ChevroletExpress 2500V6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 2000ChevroletS10V6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 2000GMCSafariV6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 2000GMCSavana 1500V6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 2000GMCSavana 2500V6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 2000GMCSonomaV6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1998 - 2000OldsmobileBravadaV6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1999 - 2000ChevroletSilverado 1500V6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
1999 - 2000GMCSierra 1500V6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24
2000 - 2000IsuzuHombreV6 4.3LCam Cast # 691, Crank Cast # 255, Right Head Cast # 772, 140, 113, Left Head Cast # 772, 140, 113, Block Cast # 9090M, Balance Shaft Cast #542, Non-Roller Rockers, Metric Thread Block, *** Not Intended for Motorhome Use ***, #4 dsctn 3/19/24

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