5.9L Long Block Model C Engine 2003-2004 – Cummins Dodge Diesel Engine

• 5.9L Cummins Long Block Reman Engine Model C
• 2003-2004  Dodge/Ram Cummins Diesel Engine Manufacturer: CHOATE Engineering Performance CHOATE Part Number: CEP59CLMC0304

Cummins Failures are no secret. Although they have been a very reliable platform for many years, they have evolved. And with it, they have developed some shortcomings that we see on a consistent basis. If you are interested in learning more about valve seat failures on the 5.9L Cummins engine. Be sure to check out the video at the end of the page. Choate Engineering fixes these issues and is known for making a good platform, great. And saving the customer money as well as down time.

The purpose of the Model C platform is to provide a superior product over the OE, for a lower cost!

This 5.9L Cummins Long Block Reman Engine Model C 2003-2004 Includes:

• Choate Billet Freeze Plugs (See Video)
• Oversized New Upgraded Valve Seats (See Video)
• *Blow Proof* Threaded Soft Plugs in Cylinder Head (See Video)
• All New Iron Matrix Valve Guides
• Install New Valve Seals
• Test Spring Tension
• Full CNC blue print machining, (bore, deck, hone and line honed). (See Video)
• The Cylinder bores are blue print bored to a true 90 degrees from the crankshaft center line, prior to being diamond honed to within .0002 inch for precise piston to cylinder bore clearances. (See Video)
• The main housing is honed to precisely align the crankshaft in the engine block. The Cylinder walls are bored 90 degrees over the crankshaft center line. The piston diameter measured to the nearest .0001 inch matched to cylinder bores. *(See Video)
• New upgraded Pistons
• New pistons rings
• New Pin retainers
• New OE tappets
• Crankshaft is Polished and ground to .0005 concentricity or less
• New Rod bearings
• New Main Bearings
• New Cam Bearing
• 12 Months/12k Warranty

CHOATE Engineering Performance Crate Engine Features:

The Choate 5.9 Cummins Model C is designed to fix all the flaws that are associated with it. Engineered for longevity it uses different machining process and specs than does the factory. It is designed to exceed the performance of the factory engine. It is made for the drivers satisfaction.

This 5.9 engine is backed by our 1-Year Unlimited Mile Warranty, ensuring reliability and peace of mind. To maintain warranty coverage and maximize engine longevity, specific components must be purchased directly from Choate, including the oil pump, oil cooler, water pump, and the necessary gaskets. These Diesel parts are critical to the 5.9 diesel engine’s performance and durability—without them, premature issues may arise.

Please note that this 5.9 Crate Engine does not include:

Oil pan
Rocker assemblies, rockers, rocker hold-downs, or rocker boxes
Pushrods
Injectors, turbos, or any fuel and air-related components
However, we offer these parts separately at highly competitive prices—guaranteed to match or beat any competitor. Get everything you need in one place for a hassle-free installation and long-lasting performance.

Watch this video to learn more about our cylinder head machining processes.

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  See how we keep from catastrophic failures happening from the coolant plugs on the Cummins.

• What is Blueprint Boring and why do we do it? 

• • Does your engine builder torque plate hone? If not you are contaminating your oil with fuel and leaving power on the table.

  • See why decking the block is so important and why no engine should ever be remanufactured without it being done!

  • Most will tell you that balancing isn’t important. But the truth is, it is a much bigger deal than you think!

   

   

• If you are thinking about upgrading to another model, here is a video that might help you decide which one is right for you.

•  So which engine is right for you? Check out this Q and A about the differences between the Workhorse and the Daily Driver.

  Common Issues With The Cummins 5.9L Block and Heads (and how we fix them)

  Check out this video with Cass. He explains the issues and the fixes of the Cummins platform. (And How we fix them.)

Cylinder Heads- While there aren’t as many issues with the bottom end of the Cummins, there are really BIG problems in the head department.

Valve seats fallout contacting the piston and cause catastrophic failure. We machine oversize valve seats within creased press fit area to remedy this issue.

Stamped gallery plugs in the heads blow out causing a mixture of oil and coolant, destroying the bearings. We thread the head and insert threaded plugs to make sure this issue never rears its ugly head.

Plus: Freeze plugs in the block blow out leaving you at best stranded on the side of the road, at worst, with a severely overheated engine in need of remanufacturing. Every new Choate Cummins engine comes standard with billet freeze plugs that are blow out proof using a tie bar bolting them into the side of the block.