Topic: 2.5L to 4.0L

[mgantt]

I have a 1993 wrangler with the 2.5L 4-cylinder.  I am pretty much car stupid but I could get some help to do a swap if I knew what I needed to get.  What would I have to get in order to do the swap.  If anyone knows a good website to visit that would be nice.

Thanks

[Jeffy]

First off, if you're not car savvy, you'll get in over your head quickly.

If you don't have anything invested in your Jeep then it would make more sense to sell the Jeep and buy a 4.0L.  Depending on stale laws it's either not enforced or pretty strict.

If you go by the book, you'll need an engine that's the same year or newer then your Jeep.  I would go with 1993-1995.5.  This will make it a bit easier since in '96 (for the 97 production year) the engine had more sensors added which makes a swap more difficult.  You will need the engine, transmission and the inputshaft for the transfer case, for starters.  You'll want to grab the driveshafts, engine wiring harness, computer, tach/speedometer cluster and engine mounts.  You'll need to either cut off the frame mounts on the donor and transfer them over or else buy new mounts for your frame.  Might as well take the radiator with it since it's more then likely larger.

You'll want the exhaust to the crossover pipe since that will bolt to your existing exhaust.  You could either reuse your engine accessories like the P/S pump. Alternator, fan, waterpump and A/C compressor or use the ones from the donor.  With the input shaft I mentioned earlier, you'll need to take apart the transfer case and press out the old one then swap it.

That's most of what's involved...

[BerkshireJeeper]

I have thought about doing it as well either the infamous 4.0 or a Chevy 4.3 from an S-10 but there is just too much involved for it to be done at this time for me. Swaping engines in Hondas are basically pull the old out, plug in the new one and go...on a Jeep  you have to worry about transfercases, transmissions, and all that happy stuff.

Once you are in 4-Lo it doesn't really matter that you are two cylinders behind does it?

[shotgun]

4, 6, or 8 it doesn't matter too much unless your in a horsepower obstacle like a hill climb. I like the 4 banger with a stick for wheeling, plenty or torque, and awesome throttle control.  Auto's will require a steady brake and loading the torque convertor to keep the control.

[Skinny]

What Jeffy listed above is it. A huge pain in the arse if you don't have the knowledge or patience to do it and do it right.   I am doing a 4.0L transplant to mine. Starting with the engine from a Cherokee hitting the stand to get tore down and rebuilt. Then on to the tranny and T-case. Also will be tore down and rebuilt.  Before anything else can go on with the transplant gotta find me a nice little junker to use for the daily driver while the Jeep is down.   Don't recommend trying to do the swap in a weekend you will most likely be late for work on Monday.