buter1ma Posted November 23, 2015 Share Posted November 23, 2015 I am looking for Comanche and I see a lot more 4 cylinder than in line 6 that I want. What would I need other than engine to swap a 2.4 with a 4.0? A list of parts would be helpful and any tips on doing it would be most helpful. Link to comment Share on other sites More sharing options...
87Warrior Posted November 23, 2015 Share Posted November 23, 2015 Engine, transmission, transfercase, motor mounts, radiator/support, engine bay wiring, fuel pump/sender, rear drive shaft and many under hood odds. It's not very difficult to do the 2.5 to 4.0 swap, especially if you have a donor XJ sitting there. Although, I must ask why you dislike the 2.5l? They are just as reliable as the 4.0l, get better fuel economy and will run down the road as well as a 4.0l. The 4.0l does have more power on tap, but I would certainly not turn down a nice 2.5l truck. Drive it and enjoy it. I had my 2.5l MJ out in the Colorado Rockies this summer and did not notice any lackluster power compared to my TJ 4.0 and XJ 4.0 when going over the passes. Link to comment Share on other sites More sharing options...
buter1ma Posted November 23, 2015 Author Share Posted November 23, 2015 I just like the 4.0. I trust it. I have had 3 wranglers, and xj with the 4.0 with no issue. I am just seeing a lot of 4 cylinder with everything I want except the 4.0.I can't find what I am looking for. Just curious what I would need to change. Would it be the same if its an 86 with the 2.8 to a 4.0? Link to comment Share on other sites More sharing options...
87Warrior Posted November 23, 2015 Share Posted November 23, 2015 No. Any 86 will require more work as they were not designed for the 4.0l. The swap can be done, at least one member has a detailed build/swap in the Projects section with an 86. There is lots and lots of good reading regarding the swap here. Everybody does it a little different to get the same results, so there isn't a rock solid write up. The truck you start with and the 4.0 you choose will greatly affect how you tackle the swap as well. Regardless, you essentially take everything from your 4.0 parts rig and put it in your 2.5 MJ chassis. Link to comment Share on other sites More sharing options...
buter1ma Posted November 23, 2015 Author Share Posted November 23, 2015 That's pretty much what I thought. I wanted to get someone else's thoughts. Thanks 87Warrior. Link to comment Share on other sites More sharing options...
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