Remanufactured 4BT Cummins Engines for Swaps

4BT Cummins Engines for Swaps & Industrial Use

Looking for a compact yet powerful diesel engine for your next custom build or industrial project? CPP Diesel offers remanufactured 4BT Cummins engines built to exacting standards using premium components from trusted names like Mahle, Clevite, and ARP.

The 4BT Cummins 3.9L 4-cylinder diesel is a proven workhorse known for its durability, torque, and simple mechanical design. Popular in industrial equipment, bread trucks, and increasingly in custom vehicle swaps, the 4BT is a favorite among diesel enthusiasts for good reason.

Whether you're swapping into a Jeep, Land Cruiser, classic pickup, off-road crawler, or powering commercial machinery, our reman 4BT engines deliver dependable performance and long-term reliability.

Each engine is carefully rebuilt to meet or exceed OEM specifications and is available in long block or short block configurations. At CPP Diesel, we don’t cut corners—we build engines that work as hard as you do.

FAQ Section

What is a 4BT Cummins engine?

The 4BT (4-cylinder B-Series Turbo) is a 3.9L inline-4 diesel engine made by Cummins. Known for its rugged simplicity, it's often used in commercial vehicles and industrial equipment. Its popularity has grown in recent years for engine swaps into smaller vehicles due to its compact size and reliable power output.

What vehicles are best for a 4BT Cummins swap?

The 4BT is a popular swap choice for:

• Jeeps (Wrangler YJ/TJ/CJ)

• Toyota Land Cruisers

• Ford Broncos

• Classic pickups (Chevy, Ford, Dodge)

• Off-road rigs and rock crawlers
  Its simple electronics and mechanical injection make it easy to integrate into older vehicles.

Is the 4BT good for industrial use?

Yes! The 4BT was originally designed for industrial applications and still excels there today. It's used in:

• Skid steers

• Generators

• Pumps

• Delivery trucks

• Agricultural and construction equipment

What’s included with a CPP Diesel reman 4BT engine?

Each remanufactured engine is:

• Built to spec with new and reman components

• Available as a long block or short block

• Tested for compression, sealing, and tolerances

• Backed by top-tier parts from Mahle, ARP, and Clevite

Can CPP Diesel help me choose the right 4BT engine?

Absolutely. Whether you're looking for a stock replacement or a performance-ready long block for a swap, our team can help you spec out the right solution. Just contact us and let us know your build goals.