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Old 05-15-2009, 11:24 AM   #1
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Engine Swap

I just bought a 97 Wrangler and the engine is a 2.5L but i want to swap it out for 4.0L, is there anything major that i need to know? I'm not much of a mechanic so im not sure on the details that i need to know. Could u guys possibly help me out?

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Old 05-15-2009, 07:59 PM   #2
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No offense but if you are not handy with a wrench I would have someone else to do it.I am a mechanic and work on vehicles every day and this past Sunday started swapping my engine and trans and I really have not ran in to any trouble yet but I have asked myself what was I thinking for the last 3 days and I am going from 4.0 and auto to 4.0 and 5 speed.I will say one thing the wiring is easy to remove and swap.Another thing I would like to add is Chrysler should have put motor pull tabs on the block some were on these things. Anyway now that I have vented You will need the engine transmission,transfer case,wiring harness(both parts)and computer.You may also want to grab the motor mounts and trans mount just to be safe.They may be the same for the 4.0 and 2.5 but not sure.The wiring harness will separate into two parts one being the PDC section that runs down to the starter,trans,and fuel pump and the other will be the engine components and runs inside to a junction box just above the left kick panel.Those two section will separate at the fire wall above the valve cover with two large plugs.

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Old 05-16-2009, 04:19 PM   #3
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ok cool thank you sir. Ya my brother in-law was going to install it and i was just going to ask if there was anything major that i needed to let him know or anything, haha i have no clue! . But thank you for what you told me, I shall pass it on!
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