Remanufactured Cummins Engines

Find the correct Cummins replacement engine for your pickup, commercial truck, fleet vehicle, or equipment. Provide the engine serial number so our team can verify the exact configuration, availability, and price.

Find the Right Cummins Replacement Engine for Your Application

Remanufactured Cummins diesel engines are available from Engines Factory in Long Block, Long Block Supreme, and Complete Drop-In configurations for pickup trucks, commercial trucks, fleet vehicles, construction equipment, and industrial applications. These remanufactured Cummins engines are offered in application-specific configurations. Long Block Supreme engines include additional components and provide a more complete configuration that is close to a Drop-In engine. Because Cummins diesel engine specifications can vary by engine family, CPL, horsepower rating, emissions system, and application, an Engine Serial Number (ESN) is required for most quote requests. Customers comparing Cummins diesel engines for sale should provide the complete vehicle VIN when an engine serial number is unavailable. Our team uses this information to identify the correct option among available Cummins replacement engines, confirm availability and core-return requirements, and prepare an accurate nationwide quote. Each quote is reviewed for the correct engine family, CPL, horsepower rating, emissions configuration, and intended application. Availability, included components, core-return requirements, and lead time can vary by model and supplier. Providing the ESN or complete VIN helps our team confirm the proper replacement engine and quoted configuration before the order is finalized.

What We Need for Your Cummins Quote

To prepare an accurate Cummins engine quote, please provide the information below. The Engine Serial Number guide in the next section will help you locate the ESN on your engine.

Engine Serial Number (ESN) — required for most applications
Complete VIN when applicable
Engine model and CPL number
Long Block, Long Block Supreme, or Drop-In configuration
Vehicle or equipment application
Core condition and available engine details

Popular Cummins Diesel Engine Families

Pickup & Light-Duty

3.9L / 4B
4.5L QSB
5.9L / 6B
5.9L ISB / QSB 12-Valve
ISB & ISB02 5.9L HPCR – RAM
ISB02 5.9L HPCR – Rear Gear
6.7L – RAM / Sterling Bullet
ISB07 6.7L HP
ISB10, ISB13 & ISB17 6.7L HP
QSB 6.7L

Medium-Duty & Vocational

8.3L / 6C
ISC BLB
ISC LB
ISL9
ISL Long Block
ISL9 CM2250 – 2010–2012
ISL9 CM2350 – 2013–2016

Heavy-Duty

M11
ISM
ISX CM870 / EPA04
ISX CM871 / EPA07
ISX 15L CM2250 / EPA10
ISX 15L CM2350 / EPA13
X15

How to Find Your Cummins Engine Serial Number (ESN)

The Cummins Engine Serial Number, commonly called the ESN, is the most important identifier for confirming the correct replacement engine. It helps verify the engine model, CPL, horsepower rating, emissions configuration, and original build specifications. The ESN is generally found on the engine dataplate, although the exact location varies by engine family. When the dataplate is missing or unreadable, check for a number stamped into the engine block. For vehicle applications where an ESN is unavailable, provide the complete VIN and engine model.

For additional manufacturer information, visit the official Cummins remanufactured engine resources.

Long Block

A Long Block is the main assembled engine, including the cylinder block, internal rotating components, camshaft, and cylinder head. Application-specific external systems and accessories are installed separately. Exact contents vary by engine family and quoted package.

Long Block Supreme

A more complete long-block package that may include additional cooling, lubrication, housing, cover, filter, and related components. Some parts may be supplied separately rather than installed on the engine.

Complete Drop-In

The most complete configuration available for the application. Depending on the engine family, it may include major fuel-system, air, exhaust, electronic, and accessory components.

Diesel Engine Replacement Guide & FAQs

Review important questions about choosing a replacement diesel engine, comparing remanufactured, rebuilt, and new options, evaluating costs and downtime, understanding warranty coverage, and planning installation and after-sale support.