Short Blocks

FORD | DODGE | GM

Short Blocks

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Add-On Parts

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Short blocks have the following included: Lower block, crankshaft, connecting rods, pistons, rings, main bearings, rod bearings, cam bearings, gaskets, harmonic balancer, flexplate/flywheel ( on most engines), rear main seal. To sum it up, this does not include any bolt on parts. WARNING!!! Only purchase this unit if you have a qualified engine specialist who can properly clean, rework, and assemble to a complete running engine, it will require numerous new parts, and a lot of time not recommended for the weekend warrior!!! Long blocks include: All the mentioned items of the short block assembly plus the complete cylinder head(s), rocker assemblies and pushrods. At times the The rocker boxes are not installed ( depending on the engine) They are placed on the engine to protect trash from getting into the engine. Our standard short and long blocks do not come with: Wiring harnesses, sensors, belts, hoses, motor mounts, injectors, fuel pumps, valve covers (these come on only for shipping purposes), turbos or water pumps. You can buy these bolt on items from us and we can ship them too you but you must install them yourself.
The Model C : Above stock level performance and comparable to OEM diesel crate motors, BUT with upgrades to fix the OEM’s shortcomings The Daily Driver: 500 HP rated. (depending on the Platform) This CHOATE engine is fully balanced, and is the perfect engine for spirited daily driving, consumer level towing and everyday life. Upgrades over the Model C include but are not limited to: Torque Plate Honing; Full Engine Balancing; Harmonic Balancer; Head Studs; Valve Seats; Rear Cover and Pickup Tube; Oil Pans; Welded Crank Gear; The Workhorse: 600 HP rated ( Depending on the Platform). Designed with the working man in mind. The perfect platform for those who do heavy hauling regularly. Fully balanced. Upgrades over the Daily Driver include but are not limited to: O-Ringed Heads; Billet Flex Plate; Coated, Fly Cut and Delipped Pistons; Stage 2 Cam; Chromoly Pushrods; Welded Cam Gear; The Cass-quatch: 1,000 HP and up. Full custom build. Designed for high performance, competition use. To be built based on customer’s intended use. We will need to work closely with you and the customer to build this to their needs. Exact pricing depends on customer’s needs.
When you’re ready to send in your core, it’s important to make sure that all fluids have been drained, the core has been shrink-wrapped, and it’s securely strapped to the pallet and crate provided. Additionally, you are required to submit images of your core to a customer service representative before a shipping BOL can be provided to you., Please make sure to include the laminated pallet ID card that was stapled to the pallet when you received your engine. This will help us process your core return in a timely and efficient manner.
Not necessarily. If your injectors are in fact good, you’re fine to reuse them. However, it is very common for trucks to run well enough that the driver can’t tell a difference, with bad injectors. And even slightly bad injectors can eventually cause catastrophic damage to an engine. We highly recommend that you get your injectors tested by a reputable facility before reinstalling them into a new engine.

Choate Performance Engineering — Remanufactured Diesel Engines Built Better Than New

Welcome to Choate Performance Engineering, where “Stock Is Not an Option.” We specialize in solving the real problems found inside today’s most popular diesel powerplants — Duramax, Powerstroke, and Cummins. Our engines aren’t just repaired; they’re fully remanufactured and re-engineered to outperform factory designs, providing the strength, reliability, and longevity every diesel owner deserves.

Reman vs. Rebuilt — Why It Matters

When we say reman diesel engine, we mean every detail is inspected, machined, and upgraded to meet or exceed OEM specifications. Unlike a simple “rebuild,” which may reuse parts and skip precision machining, our reman process corrects the known weak points in Ford Powerstroke, GM/Chevy Duramax, and Dodge Ram Cummins engines. Each short block, long block, and full running engine is built with exacting tolerances, precision balancing, and premium components for maximum durability.

Engine Solutions for Every Diesel Owner

  • Short Blocks — Ideal for budget-friendly builds with a proven, reinforced foundation.
  • Long Blocks — Fully assembled with heads, cam, and valve train for a quicker install.
  • Full Running Engines — Complete drop-in solutions tested and ready to work.
  • Upgraded Pistons & Internal Components — Designed to handle added horsepower and torque safely.

Whether you’re repairing a daily driver, building a tow rig, or maintaining a fleet, we have the right solution built to last.

In-House Machining & Engineering Excellence

Every Choate reman diesel engine is designed and machined in-house using advanced 4- and 5-axis CNC equipment, flow benches, and precision balancing technology. We eliminate OEM design flaws such as cracked pistons in Powerstroke 6.4L, bearing failures in Cummins 6.7L, or broken Duramax crankshafts. Our hands-on control over the entire process means consistent quality and unmatched reliability.

Trusted by Diesel Owners Nationwide

From weekend warriors and heavy tow rigs to commercial and industrial fleets, customers across the U.S. choose Choate for one reason — confidence. Each engine is thoroughly tested, backed by a solid warranty, and built with the same attention to detail we demand for our own trucks.