Advance Adapters and Cummins 2.8L Diesel Engine Conversion for Jeep®

At the 2016 SEMA Show, Steve Roberts from Advance Adapters and Stephen “Steve” Sanders of Cummins Repower program share in-depth details on the Cummins 2.8L diesel crate engine conversion. Tailored for Jeep®, Land Cruisers, Land Rovers, light trucks and other swaps, the high-tech R2.8L CRD is a potent, fuel efficient, self-contained “crate” solution for maximum torque output and reliability.

Entering the market in 50-State legal, E.O. certified form, the engine is a swap-ready package with Advance Adapters targeting a variety of chassis and transmission applications at initial launch.

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Cummins is a globally respected builder of industrial, commercial (medium-duty and heavy-duty trucks) plus light-duty diesel engines.  The Cummins Repower program now enables Jeep® owners and other 4×4 enthusiasts to join the Cummins family! The venerable ‘ISB’ engines, like the 5.9L 24-valve CRD in the magazine’s ’05 Ram 3500 4×4, are a testimony to the rugged reliability and efficiency of Cummins engines. The newer generation 5.0L V-8 and R2.8L four have take Nissan trucks to the next level. Cummins R2.8L power, found in the Nissan Frontier, will now be available to Jeep®, Land Cruiser, Land Rover and other 4×4 enthusiasts!

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The R2.8L four-cylinder inline common rail diesel (electronic injector CRD) is now offered as a “crate engine” for ease of installation.   The package includes important details like the ECM, a wiring harness and other “turn-key” features. Run-ready Repower engines are a Cummins specialty, the company sells complete, “crate” powerplants across the globe.

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Turbocharging is integral to the engine. The package comes complete with the starter assembly, alternator and provision for engine driven accessories.  Advance Adapters precision transmission adapters and motor mount kits complement the known Cummins reliability and contemporary”clean” technology.   

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Chassis, brakes and A/C often require vacuum, whether a brake booster, A/C controls or a Jeep YJ Wrangler front axle disconnect.  Unlike gasoline engines, a diesel engine does not produce manifold vacuum.  At right, the Cummins R2.8L engine’s vacuum pump is camshaft driven, providing the necessary vacuum for chassis/body devices.

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The engine comes with a finned cooler and fittings for remotely mounting the oil filter.  4x4s with a driver’s side drop front driveline could place a risk on an engine-mounted oil filter. (Older Jeep® inline sixes have a history of puncturing oil filter canisters along rugged trails.)  Cummins provides fittings for the remote oil filter.

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Though “busy”, everything fits neatly in the Jeep® TJ Wrangler installation at left.  On this installation, the remote oil filter mounts near the brake master cylinder/booster assembly.  At right, the front of the crate engine provides easier adaptation of engine driven accessories.  Cummins crates this R2.8L Repower engine with a new alternator, common 8-rib belt pulleys, the belt tensioner and a universal bracket for the A/C compressor.  A new power steering pump (not shown here) is also included in the package.

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Fully operational and featuring the vehicle’s original functionality, the R2.8L nestles neatly in this Jeep® TJ Wrangler engine bay. The stock 4.0L radiator is able to handle the rated 161 horsepower and 267 ft-lbs of torque, claiming an operating temperature of 177-180 degrees F. The precision machining on the Advance Adapters engine-to-transmission adapter assures a proper fit. Currently, the transmission adapter lineup fits the Ax15/NV3550 and G.M. automatics. Discussion is underway around fitting the Aisin AW4/A340 transmissions common to both Jeep® XJ Cherokee and Toyota truck applications.

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The initial launch from Advance Adapters will include several Jeep® engine mount kits and transmission adapters that include the Jeep® AX15/NV3550 and G.M. automatics.  The pilot sales will be 50-State legal, California (C.A.R.B.) E.O. certified crate engines for models through 1999, including the Jeep® CJ, YJ and TJ Wrangler plus the XJ Cherokee.  

The certification for first quarter 2017 launch of the R2.8L Cummins diesel will qualify this run-ready crate engine at the Tier 1 emissions standard. (By design, this engine is fully capable of meeting later, higher tier requirements.)  The magazine’s 1999 Jeep® XJ Cherokee will serve as a prototype ‘how-to’ installation of the Cummins R2.8L diesel. The step-by-step process will be covered in HD video for the magazine’s viewers.  Stay tuned!

More model applications for the Cummins R2.8L crate engine are under consideration, including the Jeep® JK Wrangler.  The JK Wrangler is a prime candidate for the Cummins Repower R2.8L crate engine.  Stay informed on the latest developments from Advance Adapters and Cummins.  Visit the websites at: and



  1. Kevin Bindshedler says:

    How much is this engine for the jeep JK?

    Will my six speed Jeep manual gearbox mount up to your diesel?

    If you cannot tell me the price of the engine for the JK then what is your projected price for the TJ?

    When is the JK model coming out?

    What is the number I can reach you at?

    • Moses Ludel says:

      Kevin…As of the video interview at 2016 SEMA Show, neither Cummins Repower nor Advance Adapters had hard figures on the cost for the complete crate engine or the adapters. The intent is to make this crate engine package 50-State emissions legal. After that point (early 2017), the complete package will be sold through Advance Adapters. Advance Adapters is your source for pricing and other details. Contact: Advance Adapters website.

      Also contact Advance Adapters for details on the models covered by this swap. Initially, the adapters will be for the 5-speed AX15 and NV3550: Jeep YJ and TJ Wrangler applications and rare XJ Cherokees equipped with these manual transmissions. AA and Cummins will be working on an adapter to the AW4, the automatic transmission in our 1999 XJ Cherokee.

      Initially, the Tier 1 emissions certification would only reach to 1999/2000 model year vehicles. Undoubtedly, the long term goal is to certify this crate engine to higher Tier levels, which would reach into the Jeep JK Wrangler models (at least the 2007-2011 models, perhaps even later JKs). This is all dependent upon California E.O. emissions certification and the ability to package and sell this crate engine for later applications than Tier 1.

      You and others can reach me for further questions on this engine and my R2.8L Cummins diesel swap into the XJ Cherokee at the magazine’s forums: 4WD Mechanix ‘Tech and Travel’ Forums. Please join the forums (free) and post at the Jeep section, I’ll watch for your topic questions and gladly reply there.


      Moses Ludel

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