FAB Heavy Parts · Engine Rebuild Parts

Cummins Engine Overhaul & Rebuild Kits

Shop aftermarket overhaul kits, rebuild kits, and gasket sets for Cummins engines. Start with your engine model, then compare the included components and available sizes. Have your engine serial number and parts list ready for a fitment review.

Get Help Choosing a Kit How to Choose Your Kit

Find Kits by Engine Model

Choose your engine model to view a kit and check its specifications and included parts.

A1400 · Gasket Set A1700 A2300 B3.3 QSB3.3 4BT 6BT QSB4.5 ISF3.8 QSF3.8 C8.3 NT855

A1400 links to a gasket set. Confirm engine specifications, component sizes, and kit contents before ordering.

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Rebuild Kits → Gasket Sets →
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How to Choose a Cummins Engine Overhaul Kit

Identify Your Engine

Record the engine model, engine serial number (ESN), and CPL number if available. Include a clear photo of the engine data plate when requesting help.

Confirm Parts and Sizes

Compare the listing with your parts list and engine measurements. Confirm any piston, liner, or bearing sizes with your engine rebuilder before choosing a variant.

Check the Kit Contents

Review the included-parts list for the exact kit. A gasket set and a rebuild kit serve different repair needs; components and quantities vary by listing.

Cummins Overhaul Kit FAQs

What is included in a Cummins engine overhaul kit?

Contents depend on the kit. Use the individual product's included-parts list to confirm which pistons, rings, liners, bearings, gaskets, or seals are supplied. Do not assume every component shown in a general illustration is included.

Is an overhaul gasket set the same as a rebuild kit?

No. A gasket set focuses on sealing components. A rebuild kit may also contain internal engine parts. Compare the exact contents with the repair work you plan to carry out.

Can I choose a kit using only the engine model?

Use the model to begin your search, then confirm the engine serial number, applicable part numbers, specifications, and required sizes. Kits listed for the same model may suit different configurations.

How do I choose standard or oversize components?

Ask your engine rebuilder to confirm the required sizes after inspecting and measuring the engine. Select the matching option where offered, or send us the required specifications before ordering.

Are these genuine Cummins kits?

These are aftermarket replacement kits for compatible Cummins engines. Cummins names and model references identify intended applications and do not imply authorization or affiliation.

What should I send for help finding a kit?

Send your engine model, serial number, data plate photo, and any known part numbers. Include your machine model, required component sizes, and delivery destination so our team can review your request.

Need Help Finding the Right Rebuild Kit?

Send your engine details and parts requirements to Fab Heavy Parts. Our team can help review the available kit options and provide a quotation.

Request a Kit Quote →

Cummins Engine Overhaul Kits for Diesel Engine Rebuilding

Explore Cummins engine overhaul kits at Fab Heavy Parts for diesel engine rebuilding and major repair projects. Our Cummins engine overhaul kit collection includes aftermarket replacement rebuild kits and overhaul gasket sets for selected Cummins engine applications.

Available products cover different engine families, including selected B3.3, QSB3.3, 4BT, 6BT, QSB4.5, ISC, ISX, and KTA-series engines. Kit contents and specifications vary by engine configuration and individual product listing.

What's Included in Cummins Engine Rebuild Kits?

Depending on the selected kit, components may include pistons, piston rings, cylinder liners, piston pins, connecting rod bushings, main bearings, connecting rod bearings, thrust bearings, valves, valve guides, valve seats, and overhaul gaskets.

For example, the Cummins ISC Series overhaul kit lists six pistons, six cylinder liners, bearing sets, valves, valve guides, and related rebuilding components.

The Cummins engine overhaul kit collection also includes individual overhaul gasket sets for selected Cummins engines. These gasket sets are different from rebuild kits containing pistons, liners, and bearings, so check the included components before ordering.

If you're comparing different rebuilding options, our guide to diesel engine rebuild kit types explains the differences between in-frame, out-of-frame, and re-ring kits.

Overhaul Kits for Different Cummins Engine Applications

Find replacement overhaul kits for selected Cummins B-series engines, including B3.3/QSB3.3, 4BT 3.9, and 6BT 5.9 applications.

Additional listings cover selected QSB4.5, ISC, ISF3.8/QSF3.8, ISX, KTA19, and KTA38 engine configurations.

Some products are also listed for equipment applications, including selected CASE tractors and construction equipment powered by Cummins engines. Verify the installed engine identification rather than relying solely on the equipment model.

For additional replacement components used during maintenance and rebuilding, explore our Cummins engine parts collection.

Choosing the Correct Cummins Overhaul Kit

Before purchasing, identify your complete engine model and serial number, then compare the required components with the product listing.

Pay attention to piston specifications, crankshaft main bearing sizes, connecting rod bearing sizes, and cylinder liner requirements. Certain kits offer multiple bearing-size options, while some contain semi-finished cylinder liners that require additional machining.

Confirm the required measurements with your engine rebuilder before ordering. You can also browse our broader engine overhaul kit collection for other diesel engine applications.

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