Topic: can you put a 4.0 in a 2.5 jeep

[redmonj2007]

i was wondering if the bolt patterns on a 4banger could fit a 4.0liter engine and if so what other modifications do i need to do. where can i get a 4.0liter

[Jeffy]

You will need to get the whole engine, and transmission.  You'll also need to swap out the input shaft on the transfer case and adjust both driveshafts.  Of course you'll need to get a new wiring harness and computer.

It's not something for the faint of heart.

[SMC4WD]

Besides the work involved...  You can't come here no more!!  

You know the engine compartment are both the same sizes, but wouldn't it be cheaper to throw a V6, or 350 V8 in there?  A I6 isn't that much of an upgrade...  

But I dunno, free engine and surrounding parts, anything could be done.

[Jeffy]

Oh, I also forgot that the engine mounts will also have to be removed and replaced.  That's going to involve cutting them off the frame and welding new ones on.

As for if it would be cheaper, it all depends.  If you don't know what matches in transmissions and such, then you could easily make it into a money pit.  Drop in a complete drivetrain that only needs an adapter for the transfer case and it could be cheap.  Although, you'd be better off buying a wrech then take the parts you want and sell off all of the other stuff.  Then you'd probably recoupe a lot of what you invested.

The other thing to think about is weight.  The 4.0L is a beast.  I believe it's heavier then a V8.  Some people run NV4500's but those things weigh in at 200llbs alone.  Then you'd still probably want to reconsider the Dana 35C in the back...

Lots of stuff to consider.

[Grundar32]

I too have been considering the I6 and for myself and my plan for this Jeep i belive it is the right way to go .. it will be alot of work but i think it will be worth it  :D