VEGE Remanufactured DCH4CNG 5.7L 350ci CNG Dedicated Long Block Engine

Description

Severe dry fuel exhaust seat recession and top compression ring micro-welding vanish once municipal workshops mount the VEGE Remanufactured DCH4CNG 5.7L Long Block Engine. This 350ci 8-Cylinder commercial long block repower format produces 220HP for dedicated CNG transit shuttles. Mechanics must verify intake manifold brass coolant bypass fitting sealing threads prior to torquing the cast intake manifold.

Cast from heavy ASTM A48 Class 35 gray iron, the engine block provides massive structural strength to counter extreme dry combustion heat. The VEGE engine core pairs cobalt-stellite valve seats with plasma-moly piston rings. Cranking starter demand requires 12V 175A. Engine dry weight measures 465 lbs inside a 28in length, 26in width, 27in height chassis envelope holding 5.0 quarts oil.

Key Features of VEGE DCH4CNG

Municipal transit authorities buy VEGE DCH4CNG commercial long block engines to eliminate dry gaseous fuel exhaust valve seat destruction. Dedicated machinists enforce strict industrial engine rebuild parameters during cylinder head reconditioning.

• Nodular cast iron crankshaft features micro-polished journal surfaces with 0.0003in TIR runout tolerance.
• Cobalt-stellite valve seat inserts prevent recession under severe non-lubricated CNG combustion heat.
• Ductile iron plasma-coated piston rings resist bore microwelding under dry gas combustion temperatures.
• CNC milled deck surfaces ensure 0.0002in flatness to stop high-pressure cylinder head fire-ring blowby.
• High-volume internal oil pump maintains 52 PSI line pressure across demanding fleet transit duty.
• DCH4CNG commercial core casting incorporates heavy main web bulkheads to resist thermal fatigue.
• Tri-metal copper-lead bearings establish 0.0015in running clearance to protect crank journals from wear.

Dynamometer Test Bench Load Ratings

Test cell dynamometers certify 220 continuous BHP paired with 300 ft-lbs torque output at 3800 RPM continuous test load. Fluid sensors record 52 PSI galley oil pressure at 195°F oil sump temperature, while exhaust gas temp settles at 1310°F under maximum pull. Cylinder pressure gauges verify 175 PSI compression across every cylinder within a 3% tolerance. Crankshaft runout registers 0.0003in TIR on the DCH4CNG long block engine.

Vehicle Setup Guidance Maintenance Rules

Throttle cam return spring pull effort registers 5 lbs force on the accelerator lever bracket. This powertrain is NOT manufactured for conventional gasoline carbureted applications lacking hardened dry gas valvetrain cooling. 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 Shipping Pallet Inventory

Production execution adheres strictly to VEGE assembly standard metrics backed by a 3-Year 100,000-mile parts coverage term. Secure shipment includes the rebuilt long block engine, steel oil sump pan, front timing chain cover, valve covers, oil pickup screen, and verified shop dyno printout.