VEGE Remanufactured DFHA 4.6L 281ci High Output Long Block Engine

Description

Restore full throttle acceleration through the VEGE DFHA Long Block Engine, built for commercial long block repower projects in heavy duty utility trucks. This 4.6L 281 cid Modular 3V SOHC V8 produces 300HP at 5,750 RPM. Installers must check variable cam timing solenoid screens because fine particulate accumulation causes cam phaser chatter under hot idle.

Solid ASTM A48 Class 35 cast iron shapes the deep skirt 90° V8 engine block. A nodular iron crankshaft and cracked powder metal rods rotate inside this VEGE engine core. Starter draw measures 170A on 12V commercial circuits. Dry weight scales at 505 lbs across dimensions measuring 28in length by 27in width by 28in height. Oil capacity holds 6.0 quarts.

Key Features of VEGE DFHA

Fleet supervisors buy VEGE DFHA Long Block Engine units to restore work truck performance during an industrial engine rebuild cycle. Upgraded timing chain guides and high volume oil pumps resolve low pressure valvetrain starvation issues.

• Three valve per cylinder aluminum heads house dual intake valves to boost airflow into combustion chambers.
• Variable camshaft timing phasers continuously adjust valve events across changing vehicle loads.
• High volume oil pumps ensure steady pressurized lubrication to overhead camshaft journals under idle.
• The DFHA commercial core maintains 0.0016in connecting rod bearing clearance for dependable oil films.
• Hypereutectic pistons resist ring land deformation under sustained heavy payload pulling cycles.
• Revised spark plug thread designs stop spark plug blowouts under heavy acceleration cycles.
• Multi layer steel head gaskets stop combustion blow by across the deck under heavy mechanical strain.

Dynamometer Bench Testing Thermal Ratings

Dynamometer pulls certify 300HP at 5,750 RPM and 320 ft-lbs torque at 4,000 RPM for this DFHA long block engine. Pressure transducers indicate 55 PSI oil gallery pressure at 2,000 RPM while maintaining 195°F coolant operating temperature. Combustion chamber compression balances at 180 PSI across all eight cylinders within 3% variance. Crankshaft dial indicators verify 0.0003in TIR total runout. Exhaust pyrometers register 1,230°F under sustained full brake load.

Field Usability Preventive Maintenance Schedules

Drive by wire throttle body harness clips require positive snap engagement to prevent throttle fault codes. Fleet mechanics must avoid this heavy duty replacement engine for older 2V modular chassis lacking variable cam timing computer software or vehicles with plugged cooling radiators.

• Drain break in crankcase oil after 500 miles or 30 run hours then install fresh 5W-20 motor oil.
• Inspect variable valve timing solenoid screens for particulates during initial maintenance.
• Check cylinder head fasteners in proper sequence reaching 75 ft-lbs plus 90° angle turn.

Crate Inclusions Verified Warranty Terms

The VEGE build standard includes a 3-Year or 100,000-mile limited manufacturer warranty. The heavy wooden crate holds the remanufactured long block core, oil pan, timing cover, valve covers, oil pump pickup tube, plus certified remanufacturing inspection sheets.