Had my jeep since 98' and been LOVIN it. Only problem is... I got a 4-cyl. Now I know i need to upgrade as my miles are starting to climb. I wanted to Switch my current IL 4cyl to a 6 cyl preferrably a new engine. Anyone know of great sites to by engine replacement kits? i Just want to buy everything i need (including block, mounting brackets, etc...).
If anyone has any feedback i would appreaciate it!
you can buy a complete V8 conversion kit from AEV or Burnsville Off-Road I would think. Pretty sure you need to source the engine, tranny and t-case though. If you're going to do it, don't go with a V6, just get it over with and go V8.
If you are going to go through the trouble to source the parts, weld in new mounts, replace the transmission, transfer case (or just the input), and computer plus wiring.
Why wouldn't you just put in a V8? There are plenty of them out there. Are you worried about smog and all that CA inspection stuff? Because I'm pretty sure you are going to need to do the same VIN flashing on the computer as you would with the 4.0L.
Or just do what you want. I don't see the point though.
What about using the Jeep Liberty 3.7L V-6? My wife's Liberty has plenty of power. In the lighter TJ platform the 3.7L and a NV3550 5-speed would been a great combination. Add in a Warn lock-in, lock-out hub conversion and it may even get decent fuel economy. The Liberty came with the NV3550 and the engines are cheap to source at local swap yards. Cheap enough that I could have on rebuild and sitting ready to go in the event of an engine failure.
Using a less powerful engine means that I could get away with out doing expensive axle swaps and upgrades just to keep my axles from failing. In the end, I'd probably still buy a Dana 44 for the rear but a high pinion XJ front axle would work in the front. I can get the high pinion D30 for $50.
Some of the V8's will increase your gas mileage as well as power. The 4.7L Power Tech gets better gas mileage than the 4.0. One of the things I wanted to do to my Cherokee before I got rid of it was to swap in a diesel. Great low end torque and much better gas mileage than a gas motor. Either way is good. As much as the 4.0 is a good motor, I wouldn't bother with it.
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