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ATK New 4.0L I-6 Crated Engine for 96-98 Jeep Wrangler TJ, Cherokee XJ & Grand Cherokee ZJ

ATK New 4.0L I-6 Crated Engine for 96-98 Jeep Wrangler TJ, Cherokee XJ & Grand Cherokee ZJ
Quadratec Part #: 51107-0000
MSRP
$3,273.20
Discount
-$497.20
In Cart Price
$2,776.00
Guaranteed Best Price
$2,776.00
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Usually Ships in 5-8 days
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5
1 customer reviews
5 questions answered
Description
ATK engines with cylinder heads are engineered & fully remanufactured, using only the highest-quality parts and precision-machined tolerances. These Engines are backed by a 3-year - Unlimited mile warranty! All of ATK's manufacturing facilities are both QS-9000 and ISO 9001 certified, making them one of few engine remanufactures in the world to do so. Every engine is tested for compression, oil pressure, oil leaks, engine noise and general operating condition before shipment. Engines are shipped by truck freight. When you're ready to return your exchange core - the process is simple with our 360-Degree Core Guarantee. Simply stated, your engine core need only be the same type as the one supplied, complete with no visible damage and be able to turn over 360 degrees. Core pickup is easy. Place it in the crate and call the pickup number provided with the bill of lading. We pay the freight back. A Quadratec representative will contact you regarding the exact year of your existing engine, along with VIN number and additional shipping details. Please provide a daytime phone number and/or email when ordering.
Details

These motors include a full range of new parts including most of these components: balanced pistons, balanced rods, valves, valve guides & lifters, rings, wrist pins and bushings, main connecting rod and camshaft bushings, timing chain, oil pump, brass freeze plugs, as well as a premium gasket set and all oil seals.

All engine blocks are magna-fluxed, bored, precision honed and mains are line-honed. The camshaft bearings are line-bored for accurate center-to-center clearance; all blocks & cylinder heads precision surfaced; cylinder heads magna-fluxed & machined for three-angle valve seats. All crankshafts are stress-relieved, precision ground and micro polished. Camshafts are precision ground or replaced with new.

Installation Notes
Installation Difficulty:
Skill Level 4 IconLevel 4Experts Only

1. Left Head Cast #0630.
2. Block Cast #569 / 341 / 449.
3. Fuel Injected, Gas, Overhead Valve, Rear Crank Pilot Hole is 7/8" Deep.

Installation Time: 12-16 hours
Warranty
3 Years with Unlimited Mileage Warranty.
  • Engine Size: 4.0L I-6
  • Engine Fuel: Gasoline
  • Shipping Weight: 356

  • Jeep Cherokee (XJ)

  • 1998 Jeep Cherokee (XJ)
  • 1997 Jeep Cherokee (XJ)
  • 1996 Jeep Cherokee (XJ)

  • Jeep Grand Cherokee (ZJ)

  • 1997 Jeep Grand Cherokee (ZJ)
  • 1996 Jeep Grand Cherokee (ZJ)

  • Jeep Wrangler (TJ)

  • 1998 Jeep Wrangler (TJ)
  • 1997 Jeep Wrangler (TJ)
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ATK New 4.0L I-6 Crated Engine Reviews

Logan H.
9/18/2023
5

My mechanic (Jeep specialist) was impressed with the quality of the engine, especially for the price. The engine also shipped way faster than expected. So far I've got about 1,000 miles on it, starts up instantly and runs smooth. Very happy with everything considering other shops/engine builders were quoting me 12+ weeks for a replacement engine.

Questions

Does it come fully painted?
Hi there! No, ATK crated engines typically ship either bare, primed, or with a basic protective shipping paint/coat rather than a final custom coat, meaning you should plan to clean, prep, and paint the block yourself prior to final installation.
Is it possible to put this in a Wrangler JL? I’m inspired by the Jeep YJ JL build Quadratec did
Technically anything is possible with enough custom fabrication, wiring work, and a healthy budget, but it is not a direct bolt-in swap.

That iconic YJL build was a massive, custom-engineered undertaking. Fitting a legendary 4.0L inline-six into a modern Wrangler JL requires completely fabricating custom engine mounts, modifying the firewall or transmission tunnel, and handling major integration hurdles with the JL's modern CAN-bus electrical architecture, digital dashboard, and transmission controls.

The JL engine bay was engineered around modern V6, turbo-four, and diesel powerplants, meaning an old-school distributor-driven or coil-rail inline-six is a tight and complex squeeze. If you want that classic straight-six soul in a JL chassis, you are looking at a full custom restomod project rather than a straightforward swap.
is the recommended gasket set mandatory for this engine?
Yes, it is.
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