VEGE Remanufactured DDH9 5.7L 345ci High Output Long Block Engine

Description

Facing recurring valvetrain failure under load? Select the VEGE DDH9 High Output Long Block Engine. This 5.7L 345ci V8 power plant yields 350HP for demanding commercial long block repower assignments. Mechanics must verify Multi-Displacement System solenoid harness connectors before securing the intake manifold because plug pinouts differ across truck chassis model years.

Solid ASTM A48 Class 35 gray iron forms the deep crankcase of this VEGE engine core. A nodular iron micro-polished crankshaft spins inside cross-bolted main bearing caps to withstand continuous highway hauling stresses. Cranking requires 185A across 12V starter circuits. Total dry weight measures 500 lbs inside an installation envelope of 29in length by 27in width by 28in height holding 7.0 quarts oil.

Key Features of VEGE DDH9

Service managers buy VEGE DDH9 High Output Long Block Engine inventory to minimize vehicle turnaround during an industrial engine rebuild. Quality control technicians inspect valve seat concentricity using digital vacuum decay sensors.

• Generous 345ci displacement supplies immense rotational force for utility towing applications.
• Hemispherical combustion chamber heads improve airflow velocity and optimize flame travel.
• Austenitic stainless steel valves maintain seating face integrity past 1,420°F exhaust temperatures.
• Tri-metal copper lead rod bearings support 0.0015in oil clearances under continuous highway load cycles.
• The DDH9 long block engine utilizes a high lift roller camshaft for superior mid-range power.
• Aluminum alloy hypereutectic pistons control thermal expansion to prevent cold bore scuffing.
• Multi layer steel cylinder head gaskets maintain combustion seals against continuous cylinder pressures.

Dynamic Dyno Load Tolerances

Shop testing subjects the DDH9 commercial core to continuous dyno absorption cycles. The test cell registers 350 continuous BHP with 380 ft-lbs shaft torque at 3,400 RPM. Sump oil temperature reads 195°F with oil pressure steady at 56 PSI. Combustion chambers hold 185 PSI compression with cylinder variation constrained below 3%. Crankshaft main journal runout measures 0.0003in TIR while exhaust temperatures peak safely at 1,360°F.

Installation Rules Maintenance Guidelines

Drive by wire throttle actuators move smoothly against 4.5 lbs applied tension. Do not install this modern hemispherical head V8 into passenger chassis lacking front frame rail clearance for dual exhaust downpipes.

• Perform fluid and spin-on filter changes at strict 4,000-mile or 140 run hours service marks.
• Inspect hydraulic roller lifter action and pushrods every 40,000 operating miles.
• Check cylinder head bolt torque clamp loads during scheduled major fleet overhauls.

Warranty Inclusions Product Manifest

Every motor conforms to the uncompromising VEGE assembly standard to guarantee field performance. Your purchase includes a 3-Year or 100,000-mile commercial limited parts warranty. The wood pallet crate contains the complete long block core, oil pan, front timing casing, valve covers, oil pump pickup tube, and signed dimensional inspection sheet.