Chevrolet 19256594 Genuine Crate Engine

Description

Slash vehicle nose curb weight using the Chevrolet Performance 19256594 Crate Engine. Displacing 4.8 liters across 293 cubic inches, this genuine GM replacement long block outputs 295 horsepower at 5600 RPM and 305 lb-ft torque at 4600 RPM. Built to factory tolerances, it restores compression balance and smooth acceleration in high mileage Silverado 1500 pickups.

An authentic GM cast iron block provides structural integrity across 3.780 inch cylinder bores and a 3.267 inch short stroke. Rotating components feature a nodular iron crankshaft, powdered metal connecting rods, and flat top aluminum pistons producing a 9.5:1 compression ratio. Six bolt cross bolted main caps anchor the crank journals, while cathedral port aluminum heads optimize airflow. Bare dry weight measures 435 lbs.

Key Features of Chevrolet Performance 19256594

Buy Chevrolet Performance 19256594 crate engine units to restore dependable operation in Chevrolet Silverado pickups, Tahoe SUVs, and Express commercial vans. The long block configuration accepts all factory intake manifolds, exhaust crossovers, and electrical sensors.

• Short stroke 3.267 inch crankshaft design promotes rapid throttle response and high RPM durability.
• Cathedral port aluminum cylinder heads accelerate intake airflow for crisp part throttle torque response.
• Hydraulic roller camshaft profile creates sharp valve events without valve float at 6000 RPM.
• Cross bolted six bolt main bearing caps eliminate crank journal flex under elevated operating speeds.
• Factory bolt hole patterns accept stock GM air conditioning, alternator, and steering pump brackets.
• Internal engine balance allows direct use of standard neutral balance flexplates or manual flywheels.
• Chevrolet Performance 19256594 components undergo ultrasonic cleaning and acoustic crack testing.

Short Stroke LS Dyno Verification

Dyno testing confirms 295 brake horsepower at 5600 RPM alongside 305 lb-ft torque at 4600 RPM across an operating band from 1500 to 6000 RPM. The factory hydraulic roller cam features 196 degrees intake and 201 degrees exhaust duration at 0.050 inch lift, producing 0.481 inch and 0.481 inch valve lift. The motor pulls 17 in-Hg vacuum on 87 octane pump gasoline, holding 40 to 55 PSI hot pressure.

Subframe Clearance Transmission Flange Alignment

Standard GM LS architecture drops between subframe rails on vintage Camaro, Chevelle, and C10 chassis when paired with swap engine mount plates. The crankshaft accepts 4L60E, 4L80E, or manual transmission bellhousings using standard LS flexplates or flywheels. Low profile aluminum valve covers clear power brake boosters, while the block clears intermediate steering shafts.

Initial Crankcase Priming Startup Safeguards

Technicians must pre prime the oil galleries using a pressurized pre lube tank connected to the oil port before initial start. This factory Gen IV crate motor is not calibrated for supercharger boost exceeding six PSI on stock ring gaps, or unmetered nitrous oxide systems.

• Drain break in lubricants and replace the spin on oil filter after the first 500 operating miles.
• Perform regular oil and filter changes every 3000 miles or six months with high zinc petroleum oil.
• Inspect accessory belt alignment and check water pump hose connections every 6000 street miles.

Factory Limited Warranty Shipped Manifest

Protection includes a 2-Year / 24,000-Mile factory limited warranty guarding against defective components. The shipment crate contains the assembled long block, aluminum cylinder heads, valvetrain hardware, installation instructions, and official factory warranty documentation.