VEGE Remanufactured DFZF 4.6L 281ci Car Truck Long Block Engine

Description

Spark plug thread ejection and composite intake coolant leaks cease after mounting the VEGE Remanufactured DFZF 4.6L Long Block Engine. This 281ci 8-Cylinder commercial long block repower platform puts out 235HP for municipal fleet patrol cars and service vans. Mechanics must verify cast iron timing chain tensioner plate flatness to eliminate oil bleed-by behind tensioner bodies.

Cast from heavy ASTM A48 Class 30 gray iron, the deep-skirt crankcase provides massive structural rigidity to counter engine vibration. The VEGE engine core utilizes induction-hardened nodular iron crankshaft journals and stellite exhaust valves. Cranking starter demand requires 12V 175A. Engine dry weight measures 495 lbs inside a 28in length, 26in width, 27in height chassis envelope holding 6.0 quarts oil.

Key Features of VEGE DFZF

Independent fleet repair facilities buy VEGE DFZF commercial long block units to stop fleet comebacks from persistent valvetrain failure. Assembly cells maintain verified industrial engine rebuild clean-room assembly practices throughout production.

• Nodular cast iron crankshaft features micro-polished journal surfaces with 0.0003in TIR runout tolerance.
• Cast iron timing chain tensioners replace plastic OEM tensioners to prevent chain guide slap.
• Diamond-honed cylinder liner walls promote rapid compression ring seating without excess cylinder wall friction.
• CNC milled deck surfaces ensure 0.0002in flatness to stop high-pressure cylinder head fire-ring blowby.
• Internal high-output oil pump maintains 55 PSI line pressure across demanding fleet highway duty.
• DFZF commercial core architecture incorporates deep-skirt cross-bolted main bearing caps for crankcase rigidity.
• Tri-metal copper-lead bearings establish 0.0015in running clearance to protect crank journals from wear.

Bench Dynamometer Load Operating Limits

Dynamometer load trials verify 235 continuous BHP alongside 290 ft-lbs torque output at 4000 RPM continuous operational rating. Galley pressure maintains 55 PSI at 195°F oil sump temperature, while exhaust gas temp levels off at 1220°F during dyno load. Bench sensors record 180 PSI compression across all eight cylinders within 3% balance. Crankshaft runout checks at 0.0003in TIR on the DFZF long block engine.

Field Service Directives Maintenance Rules

Throttle cam return spring pull effort registers 5 lbs force on the accelerator lever bracket. This powertrain is NOT manufactured for transverse front-wheel-drive passenger car conversions or light marine applications. Installation technicians must execute verified startup maintenance protocols without exception.

• Drain break-in engine oil reservoir and replace oil filter at 500 miles or 30 hours.
• Set hydraulic roller lifter preload depth between 0.035in and 0.045in before sealing valve covers.
• Check exhaust manifold stud nuts for proper clamping tension after the initial run cycle.

Warranty Statement Wood Crate Inventory

Engine remanufacture follows VEGE assembly standard procedures protected by a 3-Year 100,000-mile fleet warranty. The enclosed wood crate contains the fully assembled long block, stamped sheet-metal oil pan, front timing cover, stamped valve covers, oil pickup tube, and an inspector-certified dyno test document.