Chevrolet Performance GM Replacement Small Block Chevy Crate Engine [1996-2002 L31 LD Vortec 350 ci/5.7L V8]

1996-2002 Vortec L31 Light-Duty

Replacement Chevy 350 Vortec light-duty engine will provide the OE horsepower and torque specifications while offering added durability over the factory engine. New harmonic balancer, oil pan, timing cover, and valve covers come pre-installed allowing less labor time swapping parts around. This engine features precision machine work and final cylinder honing all on computer-controlled machinery.

3 Year/100,000 Mile GM Warranty

Chevy Crate Engine Break-In Guide

Engine Specifications

Power Rating: 

•  Horsepower: 255 HP
• Torque: 330 ft.-lbs.

Block Information:

• Displacement: 350 ci, 5.7L
• Cast iron
• 4-bolt main
• 1-piece rear main seal
• 9.025 in. deck height
• 4.000 in. bore
• Dipstick provisions on both driver and passenger side
• Mechanical fuel pump capable (no eccentric on camshaft)

Rotating Assembly:

• Stroke: 3.480 in.
• Crankshaft: Forged 1053 steel
• Balance: External rear, internal front
• Rods: Powdered metal 5.7 in.
• Compression Ratio: 9.4:1
• Pistons: Hypereutectic with graphite coating
• Rings: Mahle Clevite

Camshaft Specs:

• Camshaft: Hydraulic roller
• Cam Duration @ .050 in.: Intake 191 / Exhaust 196
• Cam Lift: Intake 0.414 in. / Exhaust 0.428 in.
• Timing Chain: Silent link chain

Cylinder Head Information:

• Cylinder Heads: Vortec cast iron
• Combustion Chamber: 64 cc
• Intake Runner: 165 cc 
• Valve Size: 1.940 in. Intake / 1.500 in. Exhaust
• Rocker Arms: Stamped steel 1.5
• Valve Seats: Induction hardened

Oil Pan Information:

• Oil Pan: Black 4 quart
• Oil Pump: Melling stock pressure and volume

 Long Block Includes

• Short Block
• Camshaft
• Timing Set
• Cylinder Heads
• Valve Covers
• Timing Cover
• Oil Pan
• Oil Pump & Pickup Tube

19432780 supersedes 12691673

Specifications:

Part Type

Engine

Cylinder Head Material

Cast iron

Engine Block Material

Cast iron

Engine Make/Size

Chevy Small Block

Engine Assembly Style

Long block

Engine Balance

Internal/External

Assembled

Yes

Horsepower

255

Compression Ratio

9.4:1

Cylinder Heads Included

Yes

Camshaft Style

Hydraulic roller tappet

Intake Manifold Included

No

Carburetor Included

No

Throttle Body Included

No

Distributor Included

No

Oil Pan Included

Yes

Timing Cover Included

Yes

Water Pump Included

No

Harmonic Balancer Included

Yes

Valve Covers Included

Yes

Flexplate Included

No

Flywheel Included

No

Air Cleaner Included

No

Spark Plugs Included

No

Spark Plug Wires Included

No

Computer Included

No

Wiring Harness Included

No

Rear Main Seal Style

1-piece

Quantity

Sold individually

Exhaust Valve Diameter

1.5 in (38.1 mm)

Engine Displacement

350 ci.

Connecting Rod Material Beam Style

I-Beam

Engine Type

High-Performance Crate Engine

Exhaust Valve Lift with Factory Rocker Arm Ratio (in.)

0.428

Intake Valve Diameter

1.94 in (49.276 mm)

Shipping Weight:

474

Package Height:

40

Package Depth:

30

Package Width:

40

Part Category:

Performance Parts