VEGE Remanufactured DFXN 4.6L 281ci Premium Grade Long Block Engine

Description

Persistent fleet oil consumption demands the VEGE DFXN Premium Grade Long Block Engine for your commercial long block repower. This 4.6L 281ci 8-Cylinder single overhead cam powerplant unleashes 230HP for commercial fleet transport. Machinists must verify cylinder head spark plug thread engagement depth because early cylinder head castings possess fewer threads and require verified spark plug torque to prevent thread blowout.

Solid ASTM Class 35 gray iron casting forms the deep skirt cross-bolted main bearing block structure. This VEGE engine core includes a nodular iron micro polished crankshaft and cracked-cap powdered metal connecting rods. High temperature stainless steel valves seat into sintered powder metal inserts. The 12V starter pulls 175A during cold spin tests. Net bare weight measures 500 lbs across 28in length, 26in width, 27in height, with 6.0 quarts oil capacity.

Key Features of VEGE DFXN

Commercial transport operators buy VEGE DFXN Premium Grade Long Block Engine units to finish a heavy industrial engine rebuild on schedule. Precision CNC boring bars restore cylinder sleeve geometry within 0.0002in roundness to ensure instant piston ring break-in.

• A proven 4.6L 281ci modular displacement platform delivers dependable power for municipal delivery routes.
• Deep skirt cross-bolted main bearing caps anchor the bottom end to eliminate crankshaft deflection.
• Hypereutectic aluminum pistons resist thermal expansion scuffing inside close cylinder tolerances.
• The DFXN commercial core timing set utilizes dual hydraulic tensioners to stop timing chain slap.
• Single overhead camshafts optimize valvetrain geometry without pushrod deflection under load.
• Multi layer steel cylinder head gaskets maintain fire ring seal against deck pressures exceeding 180 PSI.
• A front mounted gerotor oil pump provides constant fluid pressure to overhead camshaft journals.

Dynamometer Verification Operational Thresholds

Dynamometer cell checks confirm the DFXN long block engine generates 230HP and 290 ft-lbs of shaft torque at 4,750 RPM. Load cells maintain 2,400 RPM continuous duty while internal gallery oil pressure remains steady at 45 PSI to 65 PSI. Sump fluid stabilizes at 195°F and exhaust gas heat reaches 1,220°F. Combustion chamber compression registers 180 PSI across all eight cylinders within 4% variance. Crankshaft centerline runout measures 0.0002in TIR to verify true rotational alignment.

Field Installation Maintenance Protocols

Throttle control linkage demands 5 lbs pull force to guarantee positive return to idle stop position. Do not drop this commercial replacement engine into chassis lacking auxiliary engine oil coolers or high capacity aluminum radiators. Fleet maintenance personnel must follow structured shop service intervals.

• Perform break-in oil drainage and filter changeout after 500 miles or 30 operating hours.
• Verify timing chain tensioner arm pivot pins seat flush against cylinder block bosses.
• Inspect cooling fan clutch operation to maintain operating engine coolant temperatures below 205°F.

Crate Manifest Coverage Terms

Every engine conforms to the strict VEGE assembly standard protected by a 3-Year 100,000-mile parts warranty. Inside the timber shipping crate sits the remanufactured long block core, steel oil pan, timing gear cover, valve covers, oil pump pickup screen, and the dynamometer verification sign-off sheet.