Chevy LS4 5.3L V8 Remanufactured Engine – 2007-2009

Description

Command 303 horsepower and 5.3 liters of dyno-certified small block displacement while holding engine coolant temperatures below 200°F across grueling regional municipal pursuit and fleet patrol routes inside this Chevy LS4 5.3L Remanufactured Engine. Configured for 2007 to 2009 front-wheel-drive commercial fleet sedans, this transverse aluminum V8 features a shortened crankshaft snout and active fuel management.

Cast from high-strength A319 aluminum, this deep-skirt block features cross-bolted six-bolt main bearing caps and an Ra 25 micro-inch deck surface finish. A shortened forged steel crankshaft spins on tri-metal bearings, transferring energy through forged powdered metal connecting rods to flat-top hypereutectic pistons. Bores receive diamond plateau honing with a 45-degree angle. Dry block weight equals 395 lbs with a six-quart oil pan capacity.

Key Features of Chevy LS4

Municipal repair facilities buy Chevy LS4 long block engine packages to maintain emergency patrol sedans in peak working condition. Precision machining practices adhere to PERA standards, ensuring prolonged service life under extreme vocational demands across regional service routes.

• Shortened crankshaft snout and rear flange accommodate transverse front-wheel-drive engine bays.
• Active fuel management valvetrain components maintain factory electronic fuel-saving configurations.
• Six-bolt cross-bolted main bearing caps provide maximum bottom-end rigidity under sustained towing loads.
• High-flow 243 aluminum cylinder heads optimize high-RPM airflow volume across all speeds.
• Chevy LS4 internal gerotor oil pump sustains 55 PSI pressure through overhead valve trains.
• Multi-layer steel cylinder head gaskets withstand 195 PSI dynamic combustion strokes without failure.
• Cast-in iron cylinder liners provide long-term wear resistance inside a lightweight aluminum housing.
• Hydraulic roller lifters maintain constant valve clearance without manual mechanical adjustment.

Transverse V8 High Output Metrics

System oil pressure registers 22 PSI hot idle and 50 to 65 PSI under heavy highway load. Engine cooling temperature operates within 190°F and 205°F for optimal combustion efficiency. Output benchmarks verify 303 continuous horsepower at 5,600 RPM and 323 lb-ft torque at 4,400 RPM. Compression ratio measures 10.0:1 with dynamic cylinder pressure ranging between 185 and 195 PSI. Radiator heat rejection demands 4,300 BTU/min under Severe Commercial Fleet duty during continuous summer freight runs.

Transverse V8 Shortened Driveline Specs

The rear crankshaft hub incorporates a shortened GM metric front-wheel-drive bolt pattern engineered for 4T65E-HD automatic transaxles. Front snout length is shortened by 13 millimeters with standard keyways for compact accessory drive dampers. Crankshaft endplay ranges from 0.003 to 0.007 inches when checked with a dial gauge. Pilot bore aligns flush with heavy automatic transaxle torque converters.

Transverse V8 Pre Start Priming

Pressurize the internal main oil gallery with six quarts of 5W-30 motor oil using an oil priming tank before turning the ignition key. Bleed cooling circuit air to prevent localized hot spots around exhaust ports. Not engineered for continuous marine vessel operation, alcohol-fueled race conversions, or boost levels over 6 PSI.

• Check cockpit oil pressure gauges and fluid sight glasses each shift.
• Inspect engine cooling lines and serpentine belt wear every 5,000 miles.
• Drain crankcase engine oil and install fresh spin-on filter every 4,000 miles.

Transverse V8 Commercial Warranty Manifest

Covered by a 3-Year / 100,000-Mile commercial fleet warranty covering structural block defects and internal parts. The reinforced shipping container contains the remanufactured long block engine, high-flow oil pump, oil pickup tube, complete installation gasket kit, spark plug seals, pre-lube instructions, and hot-test dyno reports.