VEGE Remanufactured 858B 4.0L 3956cc High Output Long Block Engine

Description

Head gasket cooling port weepage on rear cylinders and cam phaser chatter immobilize commercial fleet haulers. The VEGE 858B High Output Long Block Engine eliminates thermal failure delays during industrial engine rebuild operations. This 4.0L 3956cc 6-Cylinder unit makes 236HP. Installers must prime the secondary variable valve timing oil supply passages prior to starting.

Die cast A319 aluminum with pressed spiny-type iron liners ensures block stability. The VEGE engine core houses forged steel connecting rods, dual overhead camshafts, and a forged steel crankshaft. Starter draw measures 170A at 12V. Dry weight is 375 lbs, holding 5.5 quarts oil capacity with a base envelope of 25in length, 26in width, 27in height.

Key Features of VEGE 858B

Repair facilities buy VEGE 858B industrial engine rebuild packages to repower demanding commercial route vehicles. High displacement aluminum engineering delivers high efficiency without excessive front axle chassis weight.

• Cylinder bore diameter machined to 3.700in guarantees uniform piston ring sealing under heat.
• Crankshaft stroke sized to 3.740in produces strong linear torque for towing trailers.
• Dual variable valve timing sprockets optimize camshaft timing across the operational band.
• Revised multi layer steel head gaskets eliminate rear cylinder cooling port weepage.
• Quad overhead camshaft design reduces valvetrain reciprocating mass at high engine speeds.
• The 858B commercial core bolts into commercial truck and sport utility chassis cradles.
• High capacity oil pump feeds pressurized oil to variable valve timing phasers.

Dynamometer Proofing Performance Specifications

Automated test protocols evaluate each 858B long block engine on continuous water-brake test cells. The dynamometer verifies 236 BHP and 266 ft-lbs torque output at 3800 RPM continuous load. Crankcase oil pressure holds 52 PSI at 192°F sump oil temperature. Exhaust pyrometers register 1140°F EGT across manifold branches. Cylinder compression reads 185 PSI across all six cylinders. Crankshaft center journal runout stays under 0.0003in TIR limit across all test phases.

Field Service Boundary Requirements

Drive-by-wire accelerator pedal requires 5 lbs resistance force for positive return spring action. Never install this modern quad-cam engine into vintage carbureted chassis or marine stern drive installations lacking computer management.

• Drain break-in motor lubricant and replace spin-on filter element after 500 roadway miles.
• Confirm hydraulic lash adjusters show zero clearance during upper valvetrain inspection.
• Torque cylinder head fasteners to 26 ft-lbs plus two passes of 90 degrees.

Standard Packaging Scope Warranty

Supported by our commercial VEGE assembly standard 3-Year 100,000-mile nationwide warranty, this package arrives on secured pallets. The freight pack holds the built long block, aluminum oil pan, timing covers, composite valve covers, oil pickup tube, and signed dyno certificate.