ATK Engines Replacement 4.0L I-6 Engine for 99-06 Jeep Wrangler TJ, TJ Unlimited & Grand Cherokee WJ
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.
- Engine Size: 4.0L I-6
- Engine Fuel: Gasoline
- Shipping Weight: 356
Jeep Grand Cherokee (WJ)
- 2004 Jeep Grand Cherokee (WJ)
- 2003 Jeep Grand Cherokee (WJ)
- 2002 Jeep Grand Cherokee (WJ)
- 2001 Jeep Grand Cherokee (WJ)
- 2000 Jeep Grand Cherokee (WJ)
- 1999 Jeep Grand Cherokee (WJ)
Jeep Wrangler (TJ)
- 2006 Jeep Wrangler (TJ)
- 2005 Jeep Wrangler (TJ)
- 2004 Jeep Wrangler (TJ)
- 2003 Jeep Wrangler (TJ)
- 2002 Jeep Wrangler (TJ)
- 2001 Jeep Wrangler (TJ)
- 2000 Jeep Wrangler (TJ)
Jeep Wrangler Unlimited (LJ)
- 2006 Jeep Wrangler Unlimited (LJ)
- 2005 Jeep Wrangler Unlimited (LJ)
- 2004 Jeep Wrangler Unlimited (LJ)
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ATK Engines Replacement 4.0L I-6 Engine Reviews
I purchased this engine and installed it and right away it leaked oil fast. I took the oil pan down and saw that they had sloppily installed the rear main seal (RMS). Makes me wonder what else was done sloppy, and what other issues I will have down the road with this engine.