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Chevrolet Performance 12530283

5.7L/350ci L31 Long Block Crate Engine with Vortec Heads for GM Trucks/Vans

Chevrolet Performance 12530283

809-12530283

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$2,069.99
$1,899.99
ON SALE - $170.00 OFF
Chevrolet Performance 12530283 5.7L/350ci L31 Long Block Crate Engine with Vortec Heads for GM Trucks/Vans $1,899.99
L31 HD Engine
  • Vortec 64cc Cylinder Heads
  • 1996-2002 Chevrolet Express/GMC Savana (G2,G3)
  • 1996-2000 Chevrolet/GMC Pickup (CK2,CK3)
  • 1996-2000 GMC Suburban (CK2,CK3)
  • 1996-1999 Chevrolet/GMC Chassis (P3)
  • 3/4 and 1-Ton only

  • Chevrolet Performance 12530283 Details

    L31 HD Base Engine

    3-Year/100,000-Mile Warranty, some exclusions may apply 

    Fitment Notes: This engine is not intended for marine use.

    Specifications:

    Engine Make/Size
    Chevy Small Block
    Engine Assembly Style
    Long block
    Engine Balance
    Internal/External
    Assembled
    Yes
    RPM Power Range
    Idle-5000
    Horsepower
    250
    Cylinder Heads Included
    Yes
    Crate Engine Cylinder Head Material
    Cast iron
    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
    Emission
    Not Legal
    CARB EO Number
    N/A
    CARB EO Number
    N/A
    Manufacturer's Part Number:
    12530283


    Free Shipping!

    The Chevrolet Performance Truck 350ci L31-R Long Block Assembly was designed as a direct replacement for 1996-2000 GM Full size Trucks and 1996 -2002 Full size Vans. This engine comes factory fresh, manufactured using the latest in high tech computer controlled equipment and are GM engineered, tested and validated to deliver smooth, dependable performance with a Limited 3 Year / 100,000 Mile warranty!

    Specifications:
  • *1986-2000 style block, 4 bolt mains
  • 1pc rear seal nodular iron crankshaft
  • Powdered metal connecting rods
  • Hypereutectic pistons 9.4:1 compression Ratio
  • Hydraulic roller camshaft: Int Lift .414", Exh Lift .428", Int Duration @.050" 191, Exh Duration @ .050" 196, Lobe Centerline-111
  • Vortec cylinder heads - 64cc, 1.94'' intake valve, 1.50'' exhaust valve
  • Also includes: Oil pan, timing cover, valve covers, harmonic balancer

    JEGS Easy Kits are designed by JEGS high performance racing professionals to help you get all the performance parts you need for your race car, hot rod or truck.

    GM Warranty

    Note: *Service engine block contains English threads. When used for 2001 and newer vehicles, must also use 2000 model year starter/transmission/engine mounting bolts.

  • 12530283 is rated 5.0 out of 5 by 8.
    Rated 5 out of 5 by from great got this to replace a 172K mile motor and put it in my toy, run great, purrs like a tiger !
    Date published: 2018-04-06
    Rated 5 out of 5 by from Flawless I purchased for my 99 suburban to replace a 300k L31 vin code R. Went in smooth no issues started first turn of the key. I have 500 miles on it just did a oil change zero issues. This is my 2nd motor I have purchased both are awesome other one has 15k miles on it. These are brand new not rebuilds and I highly recommend this motor
    Date published: 2017-10-25
    Rated 5 out of 5 by from 1996-2000 Chevy 5.7 4-bolt Installed in my Chevy Silverado 3 weeks ago and it's running like a champ. Super satisfied with this purchase.
    Date published: 2016-11-03
    Rated 5 out of 5 by from Very Happy with service and product. There were a couple issues with initial purchase approval but there was good communication with "real people" that made it all work out. The engine arrived VERY well crated. It was put in the truck and has been running perfectly every day for last couple weeks. Mechanic was so impressed he is recommending others to buy from JEGS.
    Date published: 2015-02-19
    Rated 5 out of 5 by from Great Products I purchased this L31-R 350ci long block for my 1998 Chevy k1500 Z71 4x4. I was very pleased with the packaging. Since i don't have the vortex on it and being a high performance guy i was a little disappointed with the output horse power with my truck being a 4x4. other than that, i'm pleased with the engines smooth running and dependability. Over all very happy with my purchase. Thanks Jegs.
    Date published: 2015-01-06
    Rated 5 out of 5 by from fast service great product,driven everyday we had it in three days installed it ,started with no problems. it is driven everyday in a delivery truck Thank You Jegs for a great product
    Date published: 2014-12-28
    Rated 5 out of 5 by from Fast delivery and went in with no problems so far so good
    Date published: 2014-12-26
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    Well this engine fit a 1998 GMC Yukon 4 x 4

    Asked by: Mmmeee
    No, you will want to use an engine like this -https://www.jegs.com/i/Chevrolet-Performance/809/12681432/10002/-1
    Answered by: Rusty B
    Date published: 2018-05-22

    what cam do u recomend to get most performance without having to change anything else. I know it will void warranty

    Asked by: caseyb33
    We have many options - Please call our tech line for assistance 1-800-345-4545 ext 2001
    Answered by: Rusty B
    Date published: 2018-05-22

    Why wouldn't this work as a marine engine?

    Asked by: Cland
    It may work, but it is not certified for marine use.
    Answered by: Rusty B
    Date published: 2018-05-22

    4.8 engine do you have a HP motor in stock for a 2000 SLE 1500 SIERRA

    Asked by: Secret weapon
    We have replacement engines avaialbel - https://www.jegs.com/c/Engines-Components_Engine-Assembled-Ready-to-Run/10763/10002/-1?N=1010763&Nrpp=180&Ns=P_PrimarySecondary%7C0%7C%7CP_SalesVolume%7C1&Tab=SKU&enginetype=4294799224&make=4294829741&model=4294829282&submodel=4294829317&year=4294829853&sbv=true Or this option - https://www.jegs.com/i/Chevrolet-Performance/809/19209063/10002/-1
    Answered by: Rusty B
    Date published: 2018-05-18

    Will this fit in a 97 k1500 1/2 ton 4x4 mine is knocking pretty bad

    Asked by: Etphette
    We would recommend this engine for your application - https://www.jegs.com/i/Chevrolet-Performance/809/12681432/10002/-1
    Answered by: Rusty B
    Date published: 2018-05-11

    I have a 1998 k1500 with 5.7 vortec  automatic overdrive trans will this engine bolt up and work with the stock pcm?

    Asked by: Silveradoftw
    This is probably a better choice for your Chevy K1500 - https://www.jegs.com/i/Chevrolet-Performance/809/12681432/10002/-1
    Answered by: Rusty B
    Date published: 2018-05-10

    Does this motor come at top dead centers 

    Asked by: Jacob 68
    No, this engine is run before it is shipped and could have stopped in any location.
    Answered by: Rusty B
    Date published: 2018-05-07

    Will this bolt up in a 2002 workhorse p30 truck?

    Asked by: OscarLWjr777
    This is only showing to fit through 1999 in the P series applications.
    Answered by: Rusty B
    Date published: 2018-04-30
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