Right now I have an 07 Ram with a Hemi that I'm getting rid of and replacing with a 2007 Wrangler Unlimited. I've made a mistake and I'm looking to fix haha. I understand the 4.0 I6 is legendary and it's no longer in production. I was planning in swapping the engine for a 4.0. Is it even worth the work or should I swap with a 5.7 Hemi, 6.1 Hemi, or Cummins 4BT? I've seen them all done. This will be a road/off-road vehicle (Daily driver but I still want to have fun). Any suggestions?
Last edited by neverhide34; 03-30-2011 at 10:05 PM..
The 3.8L that is in the wrangler is a very good motor plenty of low end torque, with more high end torque as well, they are also very reliable, swapping in a 4.0L is a terrible idea not to mention probably not allowed under your state laws. If you really want to swap goes one of your other options don't count out the Chevy engines either.
2003 Jeep Wrangler Rubicon
4.0L, 42RLE, Dual Tops, Full Doors, JKS Front Disconnects, Cragar Soft 8 Black Wheels, 33x12.5x15 Goodyear Duratracs, .75" Front Coil Spacers, Bushwacker 6" Flat Fender Flares, Skid Row Steering Box Skid, LubeLockers, Rubicon Locker Mod, OBA, Cobra 19 Ultra III CB, 3' Firestik, Rough Country 2.2 Steering Stabilizer, RC 1.25" BL, RC 1" MML, RC Grab Handles, Fog Lamp Bent Pin Mod, 4" Apline S Series Speakers, Kenwood Excelon 6.5" Speakers, 6.5" JL Audio 6W3V3 Subwoofer (in center console) w/MTX Thunder 202 amp, IPF H4 Headlight Housing, Sliverstar H4 bulbs.