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Discussion Starter · #1 ·
I bought a 2003 TJ last January and it has the 2.4L I4 in it that's about to blow and I've been wanting to put a 4.0 I6 in it. Does anyone know how hard this is? I have a standard 5 speed will an I6 bolt up? Any information appreciated
 

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Better off rebuilding the 2.4. Put a completely new head with new cams on my 2.4 last winter. It's slow on highways but does great off-road. with all the work involved for not much gain it isn't worth while. If you're gonna do a swap might as well go big. Swapping in a Chevy 350 would be about same price as swapping in a 4.0.
 
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