Chevy 4.8L L20 V8 Remanufactured Engine – 2010-2016

Description

Eradicate camshaft phaser chatter and prevent timing chain stretch under 55 PSI main gallery fluid demand during severe vocational utility transit operations using this Chevy 4.8L L20 Remanufactured Engine. Engineered for 2010 to 2016 commercial fleet trucks, this Gen IV iron-block platform features variable valve timing and active fuel management delete architecture for high uptime.

Cast from high-nickel gray iron, this deep-skirt block features cross-bolted six-bolt main bearing caps and an Ra 28 micro-inch deck surface finish. A micro-polished nodular iron crankshaft spins on tri-metal bearings, transferring energy through forged powdered metal connecting rods to flat-top hypereutectic aluminum alloy pistons. Bores receive diamond plateau honing with a 45-degree angle. Dry block weight equals 440 lbs with a six-quart oil sump capacity.

Key Features of Chevy 4.8L

Commercial transport fleets buy Chevy 4.8L remanufactured engine platforms to secure maximum operational uptime during demanding seasonal cycles. Machine tolerances follow strict AERA standards to provide uniform mechanical clearance throughout the entire rotating package.

• Cross-bolted six-bolt main bearing caps eliminate bottom-end flex under severe towing loads.
• Active fuel management delete design prevents catastrophic hydraulic lifter collapse during fleet operation.
• Variable valve timing phaser optimizes camshaft advance to broaden low-RPM cargo pulling torque.
• Multi-layer steel cylinder head gaskets withstand 195 PSI cranking compression under sustained throttle.
• Chevy 4.8L high-output gerotor oil pump maintains 55 PSI cruising lubrication inside critical galleries.
• Cylinder heads feature high-velocity cathedral intake ports for rapid throttle response under load.
• Hydraulic roller lifters reduce valvetrain friction across continuous highway transport duty.
• Diamond plateau cylinder honing provides rapid moly ring seat without bore burnishing.

Gen IV Dynamic Oil Pressure Ratings

Operating parameters require 22 PSI hot idle pressure and 50 to 65 PSI hot cruise pressure under load. Operating thermostat regulation maintains coolant heat between 190°F and 205°F during vocational service cycles. Dyno-verified output reaches 302 continuous horsepower at 5,600 RPM and 305 lb-ft torque at 4,600 RPM. A 8.8:1 compression ratio operates within 175 to 185 PSI cylinder pressure thresholds. Radiator circuits reject 4,200 BTU/min heat during severe commercial fleet operations across regional freight corridors.

Gen IV Crankshaft Driveline Alignment Specs

The one-piece rear main crankshaft flange incorporates a standard 6-bolt flexplate attachment circle with a 2.500-inch register diameter. Crankshaft snout diameter measures 1.259 inches with standard keyways for dynamic balancer installation. Radial dial indicator verification confirms total crankshaft endplay between 0.003 and 0.007 inches. Precision-ground pilot hub bores seat commercial automatic torque converters without radial runout.

Cam Phaser Priming Service Protocol Rules

Pre-lubricate oil galleries with an external pressure tank before initial ignition to coat all bearing surfaces and cam phasers. Fill crankcase with SAE 5W-30 synthetic blend lubricant and bleed cooling system air pockets under vacuum. Not engineered for marine salt water service, forced induction turbocharger systems exceeding 6 PSI boost, or gross vehicle weights exceeding 12,000 lbs.

• Change initial crankcase oil and spin-on filter after the first 500 miles.
• Inspect serpentine belt tensioner and cooling lines every 5,000 miles.
• Perform oil changes with approved motor lubricant every 4,000 miles.

Commercial Fleet Powertrain Warranty Package Details

Protected by a 3-Year / 100,000-Mile commercial fleet warranty against structural casting defects. Crated package includes remanufactured long block engine, high-volume oil pump, oil pump pickup screen, complete engine install gasket set, spark plug seal set, pre-lube instruction sheet, and dyno quality control sign-off documentation.