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Unread 07-06-2010, 01:41 PM   #1
2000TJMan
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4 cylinder to 6 cylinder

To go from I4 to an I6 how hard would it be, and what would have to be done, would it be worth the hassle.

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Unread 07-06-2010, 01:42 PM   #2
Pillswoj
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Just as easy to go V8
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Unread 07-06-2010, 01:48 PM   #3
Jerry Bransford
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It's usually better to just sell the TJ with the I4 and buy one with the I6. In addition to the engine, you'd need a different transmission, transfer case (or change its input shaft), the driveshaft lengths would need to be changed, a new engine wiring harness is needed, and you'd need a new engine computer. Not to mention the engine mounts would need to be cut off and new mounts welded into place.
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Unread 07-06-2010, 01:52 PM   #4
2000TJMan
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I figured it would be easier to buy one with an I6 just checking though. Thanks.
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Unread 07-06-2010, 10:24 PM   #5
duglas25
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I did it, as did many others on here.. It is as easy as going to a V8, but much cheaper..

I bought a wrecked TJ with I6 and swapped all the parts.. Other than welding new motor mounts on, it was all plug and play..

After selling the old parts and selling the rest of the wrecked TJ I broke even or actually made a few $$...
I could not be happier.. 4.10 gears from 4cyl, I6 power and torque.. Even with 35" tires it ran and has more than enough power..
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Unread 07-07-2010, 12:49 PM   #6
JeepN95YJ
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Quote:
Originally Posted by duglas25 View Post
I did it, as did many others on here.. It is as easy as going to a V8, but much cheaper..

I bought a wrecked TJ with I6 and swapped all the parts.. Other than welding new motor mounts on, it was all plug and play..

After selling the old parts and selling the rest of the wrecked TJ I broke even or actually made a few $$...
I could not be happier.. 4.10 gears from 4cyl, I6 power and torque.. Even with 35" tires it ran and has more than enough power..
X2!

I've swapped V8s and the 4.0. There are way more issues to deal with swapping in a V8. Folks that say it is "just as easy" have never performed the swap. I'd rate the 4.0 swap as EASY and CHEAP. I just finished my swap of a 2002 4.0 into my 2001 TJ. I even reused the old mounts I cut from the frame.
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Unread 07-07-2010, 12:54 PM   #7
gtstricky
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Some light reading for you:

http://www.jeepforum.com/forum/f9/2-...derway-576008/
2.5L to 4.0L Engine and Transmission Conversion - Jeepaholics Anonymous
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Unread 07-20-2010, 08:32 AM   #8
JeepN95YJ
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Links to my swap:

http://4bangerjp.com/forums/index.php/topic,8673.0.html

http://forum.tkotrailriders.com/viewtopic.php?t=1977


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Unread 07-24-2010, 12:44 PM   #9
2000TJMan
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Thanks that last post was very helpful.
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Unread 11-01-2011, 09:46 AM   #10
98Tjboy
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Go to a v8 for some real power!
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Unread 02-09-2012, 03:47 PM   #11
nic012cinko
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yeah im looking to do this also, but i dont want to deal with the hassles of a V8. I just want to do the 4.0. Let me know if you find anything out! i would be happy to help you also if i find anything worth while.
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Unread 02-09-2012, 04:45 PM   #12
clintrivera
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I'm curious what hassles a V8 swap has over a I6 swap. If you are mechanically inclined enough to do a I6 swap, a V8 swap is not much harder if harder at all.
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Unread 02-09-2012, 05:05 PM   #13
Wheelin98TJ
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Quote:
Originally Posted by clintrivera View Post
I'm curious what hassles a V8 swap has over a I6 swap. If you are mechanically inclined enough to do a I6 swap, a V8 swap is not much harder if harder at all.
Finding parts for the V8 swap is more difficult. For example, radiator hoses.

The wiring with the V8 swap is more difficult. No plug and play, you'll be splicing.

The exhaust for the V8 will be custom.

Transmission behind the V8 will often require a custom crossmember.

V8 will sometimes need gauges other than stock TJ gauges.
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Unread 02-09-2012, 05:23 PM   #14
clintrivera
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Originally Posted by Wheelin98TJ View Post
Finding parts for the V8 swap is more difficult. For example, radiator hoses.

The wiring with the V8 swap is more difficult. No plug and play, you'll be splicing.

The exhaust for the V8 will be custom.

Transmission behind the V8 will often require a custom crossmember.

V8 will sometimes need gauges other than stock TJ gauges.
As far as my LS swap went the stock lower hose that came with the engine worked fine cut down a little, the upper was a $10 universal hose. The wiring for the engine to run required two wires to be spliced in (ignition and fuel pump).

The exhaust was easy with a few bends, and if you don't get the whole donor for the I6, you will have to do some fabbing on the exhaust as well. My crossmember needed one hole drilled to work. Stock guages work great and I even have a tach with the Novak converter (stock senders in the block).

Not to mention the engine is lighter, has more power, gets better fuel economy, more potential to mod, sounds better, etc, etc...

Not a cheap swap though. On a budget I would have to go with the 5.2/5.9 magnum.
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Unread 02-09-2012, 05:25 PM   #15
JBTJ
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Originally Posted by 98Tjboy View Post
Go to a v8 for some real power!
Why? yours won't do the speed limit?
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4 cyl , 6 cyl , swap , engine swap , difficulty , suggestions , help , TJ , advice

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