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ATK AMC 242 CID Inline 6 Cylinder Replacement Jeep Engine - DA23

universal fit logo


  • ATK NORTH AMERICA | Part Number: ATKDA23
  • Engine Configuration:L6
  • Engine Type:Long Block
  • Fitment:Universal Fit
  • Displacement:242


When you purchase an engine from ATK you can rest assured that you are buying something that is better than new quality. Why does ATK have better than new quality? Every engine that ATK remanufactures is reverse engineered to ensure that any original factory defects are removed, saving you time and money and keeping your car or light truck on the road and out of the shop. *Retail price does not include the manufacturer core charge. A sales rep will contact you when your order is received regarding the core charge and availability.



Question & Answers

3 Answered questions

how hard is it to swap the 2.5 and put the 4.0 in the 1992 Wrangler

Asked by Reel Havoc from USVI on

Reel Havoc, the ATK NORTH AMERICA AMC 4.0L Replacement Jeep Engine is a long block so you will need all of the front running gear (power steering pump, water pump, alternator, etc) Also you will need all of the exhaust and intake manifolds and the flywheel and flexpleate or clutch. The motor mounts will have to be moved and you will need a transmission that will bolt up to the 4.0 as well. Plus you will need all of the wiring and computers needed to run the motor and possible the trans if you went with an automatic. Doing any kind of motor swap requires a good bit of work, and this one is no exception. It's definitely a good option to do because the 4.0 has a good but more power then the 2.5. The swap is a lot easier if you have a doner Jeep to get all of the little parts you will need that are hard to source or expensive to get in the aftermarket. If you have any other questions or need any other help feel free to give me a call at the extension below. Hope this helps!

Answered by Zach O. ext 4939 from USVI on

can I run mobile 1 oil as soon i put this motor in or do i have to break it in first?

Asked by from miami fl. on

ATK and we recommend you use conventional oil the first 1000 miles, and also try to refrain from highway driving or situations where you would keep a constant RPM.

Answered by Aaron S. from miami fl. on

What all dose this reman engin come with when purchased from you?

Asked by Phillip new 2,4x4 from Burlington WA on

Hello Phillip, This ATK 4.0L 6 cylinder engine is a long block which is the lower block with all internal parts and the upper cylinder head with the internal parts. You will have to use the factory outer bolt on parts from your engine such as the water pump, timing cover, oil pan, valve cover, distributor and fuel pump anything that needs bolted on.

Answered by Bob from Burlington WA on


As the largest private label crate engine remanufacturer in North America, ATK has been around for over 80 years producing parts including high performance engines, transmissions and rear axles. When your Jeep needs an engine rebuild, an ATK remanufactured engine uses reverse engineering processes to virtually eliminate factory defects that hinder performance. One reason ATK is at the forefront of engines is their adherence to thorough cleaning and inspection techniques and their machining and magnafluxing capabilities. If staying out of the garage and out on the trail is a priority, rely on ATK to get your 4x4 up and running. Shop ATK NORTH AMERICA Now