Shop by Brand

View all Brands

12 Valve Cummins Long Block Engines for Sale 1989-1998 Dodge Ram 2500 & 3500

Shop 12 valve Cummins long block engines for sale for 1989-1998 Dodge Ram 2500 and 3500 trucks. These engines are a direct replacement for trucks equipped with the 5.9L 12 valve Cummins diesel and are built for reliability, towing, and performance applications.

CPP Diesel offers multiple 12 valve Cummins engine for sale options, including stock replacement long blocks and performance-built engines designed for durability and power.

Each remanufactured 12 valve Cummins long block is built to handle real-world diesel applications, from daily driving and farm trucks to heavy towing and high-performance builds.

The 1989-1998 trucks use the legendary mechanical 12 valve Cummins engine, known for its simplicity, durability, and ability to handle high horsepower builds.

Race-Proven Diesel Engine Experience

With over 16 years of diesel engine building experience, CPP Diesel has built everything from daily drivers and tow rigs to competitive race engines and 3.0 class sled pulling trucks.

Our experience in diesel racing and sled pulling allows us to build 12 valve Cummins engines that hold up under extreme conditions while maintaining reliability for street, towing, and work truck use.

Built for Stock Replacement, Towing, and High Performance

The 12 valve Cummins is one of the most respected diesel engines ever built. Some customers need a reliable reman 12 valve Cummins long block for a daily driven truck, while others are building high horsepower performance or competition setups.

Whether you're restoring an older Dodge Ram or building a performance diesel, CPP Diesel offers 12 valve Cummins engine replacement options built to last.

What Is a 12 Valve Cummins Long Block?

A 12 valve Cummins long block is the core engine assembly. It typically includes the engine block, crankshaft, connecting rods, pistons, camshaft, cylinder head, and valvetrain. It does not include turbochargers, injectors, fuel system components, or external accessories.

A long block provides a complete foundation for your build, allowing you to reuse or upgrade components like your P-pump, turbocharger, and injectors.

Fits 1989-1998 Dodge Ram 12 Valve Cummins Trucks

This category includes 12 valve Cummins long block engines for 1989-1998 Dodge Ram trucks, including Ram 2500 and Ram 3500 models equipped with the 5.9L 12 valve Cummins diesel engine.

1989 Dodge Ram 2500 / 3500 5.9 Cummins
1990 Dodge Ram 2500 / 3500 5.9 Cummins
1991 Dodge Ram 2500 / 3500 5.9 Cummins
1992 Dodge Ram 2500 / 3500 5.9 Cummins
1993 Dodge Ram 2500 / 3500 5.9 Cummins
1994 Dodge Ram 2500 / 3500 5.9 Cummins
1995 Dodge Ram 2500 / 3500 5.9 Cummins
1996 Dodge Ram 2500 / 3500 5.9 Cummins
1997 Dodge Ram 2500 / 3500 5.9 Cummins
1998 Dodge Ram 2500 / 3500 5.9 Cummins

Common Reasons to Replace a 12 Valve Cummins Engine

While the 12 valve Cummins is extremely durable, high mileage, wear, and heavy use can lead to engine failure. Common reasons customers search for a rebuilt 12 valve Cummins engine include:

Excessive blow-by
Low compression
Piston damage
Cylinder wear
Head gasket failure
Overheating damage
Oil consumption
Worn internal components

When Should You Replace Your 12 Valve Cummins Engine?

If your engine has excessive wear, internal damage, or catastrophic failure, replacing it with a 12 valve Cummins long block is often the most reliable and cost-effective solution. Many Ram owners choose a long block when rebuilding costs become too high.

Stock 12 Valve Cummins Long Blocks vs Performance Builds

CPP Diesel supports both stock replacement engines and high-performance builds. The mechanical 12 valve Cummins is extremely popular for performance applications due to its simplicity and ability to handle high horsepower.

Engine Type	Best For	Main Benefit
Stock Replacement	Daily driving, work trucks	Reliable engine replacement
Performance Build	High horsepower builds	Handles increased power
Competition Engine	Racing and sled pulling	Built for extreme durability

Supporting Parts to Consider With a 12 Valve Cummins Long Block

If you are looking for newer engine options, check out our 5.9 Cummins long block engines or 6.7 Cummins long block engines.

Why Buy Your 12 Valve Cummins Long Block From CPP Diesel?

Over 16 years of diesel engine building experience
Built using real-world diesel performance and racing experience
Proven performance in high horsepower and competition builds
Stock and performance engine options available
Diesel experts who understand Cummins engines

12 Valve Cummins Long Block FAQ

What makes the 12 valve Cummins different?

The 12 valve Cummins uses a fully mechanical fuel system, making it simpler and more durable than newer electronically controlled engines.

Is a 12 valve Cummins good for performance builds?

Yes, the 12 valve Cummins is one of the most popular diesel engines for high horsepower builds.

Is a 12 valve long block a good replacement?

Yes, a long block provides a reliable foundation for replacing a worn or damaged engine.

Quick view

CPP LONG BLOCK 5.9 CUMMINS ENGINE 89-98

MSRP:

Was:

Now: $6,181.52

Choose Options Compare

Quick view

CPP LONG BLOCK 5.9 CUMMINS ENGINE 89-98
5.9 Cummins Premium Reman Long Block The CPP Diesel Long Block Crate Engine 1989-1998 Cummins 5.9L 12V is the ultimate choice for those seeking unmatched performance and durability. With exceptional features and precise design, this 12 valve Cummins...

MSRP:

Was:

Now: $6,181.52
Choose Options Compare

Compare Selected