19432779 5.7 Ltr - HD 350 C.I.D. - GM Engine 1996-2002 New Gen1e
Replaces 12691672, 12530283 and 12681431
Replacement Engine With A 3Year 100,000 Warranty

Free Shipping to a business
with a forklift in the lower 48
Questions? Call 847-276-8110

What's New

• Cylinder head and block castings
• Forged-steel crankshaft
• All blocks are four-bolt main
• All blocks are mechanical fuel pump-capable (Gen1e has no camshaft eccentric)
• Machined using state-of-the-art CNC
• Machined and assembled in the USA

L31
1996 2000 CHEV/GMC PICKUP,SUBURBAN (CK2,3)
1996 1999 CHEV/GMC CHASSIS (P3)
1996 2002 CHEV/GMC EXPRESS,SAVANA (G2,3)
4 BOLT MAINS. SERVICE ENGINE BLOCK CONTAINS ENGLISH THREADS, WHEN USED FOR 2001 AND NEWER VEHICLES, MUST ALSO USE 2000 M.Y. STARTER/TRANSMISSION/ENGINE MOUNTING BOLTS

 

 

Information	Gen 1E HD
	12691672
	General (Stock Configuration)
RPO	L31
Liter Displacement	5.7
Cubic Inch Displacment	350
Bore (inches)	4.000
Stroke (inches)	3.480
Firing Order	1-8-4-3-6-5-7-2
Cylinder Head Material	Cast Iron
	Block
Main Bearing Cap Design	4 bolt cast iron
Block Part Number	12691718
Block Casting Number	10243880
Core Plug Material	Stainless Steel
Deck Height (Inches)	9.025
	Camshaft
Material	Cast Iron
Camshaft Type	Roller lifter
Cam Bearings	New, OE/Spec
Number of Bearings	5
Type of Drive	Single-row roller chain
	Crankshaft
Material	Forged 1053 Steel
Crank Journal Diameter (inches)	2.750
Number of Bearings	5
Rear Main Seal	1 pc.
Harmonic Ballancer	10243271
	Connecting Rods
Material	Powdered Metal Steel
Connecting Rod Ratio	1.58:1
Rod Bearings	OE
	Pistons
Material	Graphite Coated Hypereutectic
	Valve System
Type of Drive	OHV
Lifters	Hydraulic Roller
Valve Rotators	None
Pushrods	Tubular Steel
RockArm Ratio	1.5:1
	Cylinder Head
Exhaust Seats	Alloy Insert
	Valves
Intake Valve Material	Steel
Intake Face Angle (degrees)	45
Intake Guides	Intergral
Intake Head Diameter (inches)	1.94
Intake Lift (inches)	0.3850
Intake Duration (degrees)	191 @ 0.050
Exhaust Valve Material	Steel
Exhaust Face	Hardened
Exhaust Face Angle (degrees)	45
Exhaust Guides	Integral
Exhaust Head Diameter (inches)	1.5
Exhaust Lift (inches)	0.4280
Exhaust Duration (degrees)	196 @ 0.050
	Oil Pump
Type	Melling w/screen
Oil Pressure	Stock
Volume	Stock

Terms and Conditions
Warranty Information
GM Goodwrench Crate Engine Start-up Instructions

Link to specs

Notes: 4 BOLT MAINS. SERVICE ENGINE BLOCK CONTAINS ENGLISH THREADS, WHEN USED FOR 2001 AND NEWER VEHICLES, MUST ALSO USE 2000 M.Y. STARTER/TRANSMISSION/ENGINE MOUNTING BOLTS. See accessory bolt part number 15552852 below