19432778 5.7 350 Chevy V8 1987 - 1995 General Motors Engine replaces 12691671, 12703983, 12681430 and 12568758
4 Bolt Mains
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 roller camshaft-ready
- 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
What’s Included
- All-new, non-remanufactured engine assembly
- New valve covers, oil pan, timing cover, and harmonic balancer for convenient installation
- End-of-line torque-to-turn, compression, and oil-pressure testing
Proudly machined and assembled in the USA.
Built in Springfield, MO, of globally sourced parts.
L05
1987 1994 CHEV/GMC VAN (G1,2,3)
1995 1995 CHEV/GMC VAN (G2,3)
1987 1987 CHEV/GMC PICKUP,SUBURBAN (RV1,2)
1988 1991 CHEV/GMC SUBURBAN (RV1)
1988 1995 CHEV/GMC PICKUP,SUBURBAN,TAHOE (CK1,2)
Early 90's design cylinder heads w/different center bolt drill angle.
Flat style lifters, but machined for roller lifters
Machined fuel pump hole but no lobe on the cam shaft.
Center bolt valve covers.
| Information |
Gen 1 |
| |
12691671 |
| |
General (Stock Configuration) |
| RPO |
LO5 |
| 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 |
Flat Tappet Lifter |
| Cam Bearings |
New, OE /Spec |
| Number of Bearings |
5 |
| Type of Drive |
Silent Link Chain |
| |
Crankshaft |
| Material |
Forged 1053 Steel |
| Crank Journal Diameter (inches) |
2.750 |
| Number of Bearings |
5 |
| Rear Main Seal |
1 pc. |
| Harmonic Ballancer |
12551538 |
| |
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 Flat Tappet |
| Valve Rotators |
Yes |
| Pushrods |
Tubular Steel |
| RockArm Ratio |
1.5:1 |
| |
Cylinder Head |
| Exhaust Seats |
Induction Hardened |
| |
Valves |
| Intake Valve Material |
Steel |
| Intake Face Angle (degrees) |
45 |
| Intake Guides |
Integral |
| Intake Head Diameter (inches) |
1.94 |
| Intake Lift (inches) |
0.3850 |
| Intake Duration (degrees) |
194 @ 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) |
0.4040 |
| Exhaust Duration (degrees) |
202 @ 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
