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

Chevrolet Performance 12530283

809-12530283

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Chevrolet Performance 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 SAE threads. When used for 2001 and newer vehicles, must also use 2000 model year starter/transmission/engine mounting bolts.

    12530283 is rated 4.9 out of 5 by 10.
    Rated 5 out of 5 by from Good motor to upgrade. 325 hp Bought this motor for my 91 Chevy ex cab half ton.about 7 yrs.ago.have 35,000 mi.on her and runs excellent. Wanted to upgrade for more power I use my truck to pull a little toy hauler.19foot. And to NOT to have to put additives in the oil because of flat tappet cam. L31 is roller cam. And the additional HP.with the vortex heads.you can message them a little ..and cut the valve guide down put new seals and springs. Then you can put a little bigger cam in. The L31 also has over 9 to 1 comp. Then I sent my throttle body to Morris machine and the bored out for more air and put a adjustable fuel pressure regulator on. And set it on a edlebrock intake. Cleaned up ign.with MSD. Some true dual exhaust. Don't get me Rong it's NOT a race truck.but I went from 180hp.which was stock for 1991. To 325 to 360 it's a happy truck.that fits my purpose very well and it's paid for. Bought most all the parts through JEGS always great to do business with. And I got a new chip..
    Date published: 2018-08-17
    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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    Will this engine work with mechanical fuel pump as delivered for my 86 Silverado c10, if not what engine like this will work. Thx!

    Asked by: Bryant5
    This engine will work with a mechanical fuel pump.
    Answered by: Rusty B
    Date published: 2018-10-13

    If I buy this engine...what is the biggest performance cam you guy's recommend for it?

    Asked by: z28zack
    Changing the cam will void the GM warranty on this engine. Unless you are upgrading the intake and EFI system a cam change will not work well.
    Answered by: Rusty B
    Date published: 2018-10-13

    Will this work for a 79 corvette?

    Asked by: FredP123
    No, you will want a 2 piece rear main seal engine if you want to keep all of your original accessories. This is an option - https://www.jegs.com//i/Chevrolet-Performance/809/12681429/10002/-1
    Answered by: Rusty B
    Date published: 2018-10-03

    If I have a problem with the engine, how do I claim warranty work on it?

    Asked by: Reed1
    You would contact the dealer on installer of the engine first.
    Answered by: Rusty B
    Date published: 2018-10-01

    Will this work as a direct replacement for my 1995 GMC K1500?

    Asked by: WingBuster71394
    THis will work, it is not a direct replacement, this will be a direct replacement https://www.jegs.com/i/Chevrolet-Performance/809/12681430/10002/-1
    Answered by: Rusty B
    Date published: 2018-09-20

    If I put this in my 1985 GMC C10, will the warranty still apply?

    Asked by: danielle2717
    When installed by a Chevy dealer the warranty should still apply.
    Answered by: Rusty B
    Date published: 2018-09-14

    Will it fit in my chevelle 1971ss

    Asked by: Tiger74
    It will fit your Chevelle, but probably not the easiest choice of replacement engines. This would be a better choice - https://www.jegs.com/i/JEGS/059/7353/10002/-1
    Answered by: Rusty B
    Date published: 2018-09-12

    How many quarts of oil should it take?

    Asked by: Hunter47201
    This engine should take 5 qts of oil and 5.5 with a new oil filter.
    Answered by: Rusty B
    Date published: 2018-08-29
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