Swapping 2cyl for 4cyl

Jeremy_C · 06-13-2009, 08:26 PM

I'm an idiot when it comes to searching, Because i'm sure this has been posted 1,000 times. Sure couldn't find it.

Is it worth it to purchase a 4cyl TJ, and swap in a 6cyl? noticed the price on 4cyl is considerably cheaper then the 4.0

I'm looking at 97-2000 TJ's. I dont want the 4cyl, but if its feasible to drop the 4.0 in it, i will consider it.

Thanks for the help, and the links to posts where this is discussed. Cause i know thier coming.

Muddybrit · 06-13-2009, 08:30 PM

Surely you mean a 4 to 6 right?

**missionAvs** · 06-13-2009, 08:32 PM

Quote:

Originally Posted by Muddybrit

Surely you mean a 4 to 6 right?

x2, you mean 4 cylinder and 6 cylinder right?

BWFBezerk · 06-13-2009, 08:37 PM

Personally I swapped out my 50hp 2cyl to a 4cyl for the power, especially after getting 33's.

**Imped** · 06-13-2009, 08:41 PM

WTF? I don't think there is a car out there that ever came with a 2cyl so you're obviously very mistaken. TJs only came with 4 and 6 cylinders.

BeerMe · 06-13-2009, 08:45 PM

Now that Jeep is owned by Fiat we may get some 2 cylinders. They used to be famous for their 2 cylinder autos.

**Knuckelhead** · 06-13-2009, 08:49 PM

Quote:

Originally Posted by imped4now

WTF? I don't think there is a car out there that ever came with a 2cyl so you're obviously very mistaken.

I had one years ago...
http://www.synlube.com/tenyears.htm

**Imped** · 06-13-2009, 08:52 PM

Quote:

Originally Posted by Knuckelhead

I had one years ago...
http://www.synlube.com/tenyears.htm

Excellent. I stand corrected. But I'm POSITIVE there has never been a 2 banger wrangler.

Jeremy_C · 06-13-2009, 08:53 PM

Yes, thats what i mean. I've been out in the sun all day long, I'm normally not this stupid. I'll do better next time.

Jeremy_C · 06-14-2009, 02:57 AM

This topic got more attention when everbody wanted to be funny..... maybe since its fixed, i can get a reply?

**xantasm** · 06-14-2009, 05:04 AM

Speaking from personal experience with a 3 year long project I refused like to hell to let go and admit I took on more than I should have, get a 6cyl and rebuild it. If you get a 4 cyl and decide to drop in a 6 cyl here's a list of most of what I remember that you'll need:

-4.0 Engine, valve cover, oil pan, timing cover, and all the bolts
-AX-15, BA-10, or TF999 Transmission - might be mistaken on the auto but for sure the standard AX-5 will not work with a I6
-rebuild transfer for new input shaft or buy rebuilt transfer with correct spline inpute shadft plus speed sensor gear
-Driveshafts
-motor mounts
-engine frame mounts - have to cut old frame mounts and weld I6 mounts in
-transmission mounts cause they are different
-wiring harness in dash and under hood unless you want an extreme nightmare of a mess with wiring - trust me I tried the hard way first
-pulleys for an I6
-new radiator as the single core I4 radiator isnt big enough to handle the cooling needs of an I6
-engine and tranny sensors
-intake manifold for an I6
-exhaust manifold for an I6
-exhaust for an I6
-starter for an I6
-hoses, belts, gaskets for an I6
-alternator for an I6

lots and lots and lots of patience, money, and time and Im sure Im forgetting something to add to that list

I took my 89 YJ 2.5L and completely overhauled it into a 93 4.0L. I went with 93 because nothing about an 89 will work with a 4.0L unless severely modified. I know the TJ uses an OBII system and that year YJ uses an OBDI system but the principles are the same. Looking back on it I would have saved a lot of money if I had decided to go with a prefferred year and kept all my parts to that year, but it was alot of live and learn. Moral of the story though is rebuilding a jeep that came with the motor and tranny you want is always far easier and cheaper than converting the entire drivetrain to the one you want. I did mine because I loved my YJ but wanted a 4.0L, not because it was the smarter route. Four years later I sold it for 9k but probably spent that much converting it. Only good thing was the rear end was geared for a 4cyl now with a 4.0L and a centerforce II clutch so it would push 33"s really well and would squall 31"s from a stop.

Here is some of the pics from my project on photbucket. I moved and lost a bunch of em but I think you'll get the idea:
http://s101.photobucket.com/albums/m53/xantasm28/2006-03-10/

2000jeeper · 06-14-2009, 06:13 AM

like posted above you will need a engine preferably complete with harness, pcm, starter, and accesories.
engine mounts the rubber isolators are the same according to my neiborhood napa store.
radiator.
tranny with tcase or get a imput shaft from a junk tcase that was behind a 6 cylinder drivetrain.
frame mounts for the engine. check on ebay i found some dirt cheap.
driveshafts.

it really is not that hard if you know what you are doing and have auto repair and fabrication experiance. i am doing this same swap in my 2000. i found a guy on ebay that cut me a deal on a complete turn key set up for 2grand. i am going with a tom woods drive shaft as i am doing a sye because of my lift.

by the way my price tag so far is at 2700 bucks. that is for parts. since i am doing it myself i dont count the labor. besides i like doing stuff like this.

i have all the peices parts for mine now just need to set aside about a week to do it. plus my friend is doing the welding for me on the frame mounts. there is a write up that was done that is very informative. i cant think of his name though.

**RubiconRazorbac** · 06-14-2009, 07:58 AM

If you already know you want the 6cy, it will be much less expensive overall if you pay a little extra for the 4.0L up front.

patricknolan · 06-14-2009, 09:42 AM

Quote:

Originally Posted by RubiconRazorbac

If you already know you want the 6cy, it will be much less expensive overall if you pay a little extra for the 4.0L up front.

x100,000,000

**slafferty** · 06-14-2009, 11:11 AM

buy the 6 cylinder first

06-14-2009, 05:04 AM	#11
xantasm Cav scout Join Date: Mar 2009 Location: Las Vegas, Nevada Posts: 659 Profile Gallery Classifieds My Jeeps	Speaking from personal experience with a 3 year long project I refused like to hell to let go and admit I took on more than I should have, get a 6cyl and rebuild it. If you get a 4 cyl and decide to drop in a 6 cyl here's a list of most of what I remember that you'll need: -4.0 Engine, valve cover, oil pan, timing cover, and all the bolts -AX-15, BA-10, or TF999 Transmission - might be mistaken on the auto but for sure the standard AX-5 will not work with a I6 -rebuild transfer for new input shaft or buy rebuilt transfer with correct spline inpute shadft plus speed sensor gear -Driveshafts -motor mounts -engine frame mounts - have to cut old frame mounts and weld I6 mounts in -transmission mounts cause they are different -wiring harness in dash and under hood unless you want an extreme nightmare of a mess with wiring - trust me I tried the hard way first -pulleys for an I6 -new radiator as the single core I4 radiator isnt big enough to handle the cooling needs of an I6 -engine and tranny sensors -intake manifold for an I6 -exhaust manifold for an I6 -exhaust for an I6 -starter for an I6 -hoses, belts, gaskets for an I6 -alternator for an I6 lots and lots and lots of patience, money, and time and Im sure Im forgetting something to add to that list I took my 89 YJ 2.5L and completely overhauled it into a 93 4.0L. I went with 93 because nothing about an 89 will work with a 4.0L unless severely modified. I know the TJ uses an OBII system and that year YJ uses an OBDI system but the principles are the same. Looking back on it I would have saved a lot of money if I had decided to go with a prefferred year and kept all my parts to that year, but it was alot of live and learn. Moral of the story though is rebuilding a jeep that came with the motor and tranny you want is always far easier and cheaper than converting the entire drivetrain to the one you want. I did mine because I loved my YJ but wanted a 4.0L, not because it was the smarter route. Four years later I sold it for 9k but probably spent that much converting it. Only good thing was the rear end was geared for a 4cyl now with a 4.0L and a centerforce II clutch so it would push 33"s really well and would squall 31"s from a stop. Here is some of the pics from my project on photbucket. I moved and lost a bunch of em but I think you'll get the idea: http://s101.photobucket.com/albums/m53/xantasm28/2006-03-10/ __________________ JP - Thats me, not the magazine !_____________ /____ l_q\o___o\p l_____l___l----OlllllllO- -''''''-------''''''-q[xx]p''' (o) )``````(o) )--o-) ) ┌∩┐(◣_◢)┌∩┐ With Death rides the scout. Go Cav, go Army.