post #1 of Old 03-03-2008, 12:19 PM Thread Starter
duglas25
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update on my 4cyl to 6cyl swap

I just wanted to give a update to my 4 to 6cyl swap.. Many people have asked for an update so I thought I would start a new post

Most people say it is not worth it because it is the same work to swap a V8. I am going to have to disagree with this, it is much easier and cheaper to use the 6cyl instead of a GC V8.

I bought a wrecked 97 Sport, 6cyl 5 speed. I used the engine, computer, trans, tcase, cluster, exhaust and driveshafts.
I had to weld in new motor mounts(Hardest part), rest was beyond easy, there were no wires to cut, no driveshafts or custom harness's..

I paid $1500 for the parts TJ, sold my 4cyl,tcase,trans, seats, and AC Setup for $1300 and I still have the windshield frame, tailgate, axles, soundbar, seat belts, and rollbar left.. So I broke even or made a few $$.

I bought the following parts:
Motor Mounts $70
Clutch $150 (not needed but easier when it was out of TJ)
Oil for motor, trans, tcase, axles $79
Exhaust Manifold $125 (just because they all crack)

Other than the motor mounts, all the plugs were the same and just swapped computers and it started right up. No check engine lights, no problems..
Had I of gone with a V8, I would of had to get a harness made or figure out the wiring, get a shifter, have driveshafts made, and get a new radiator.

I do know you get an extra 100ft of torque with the V8.

As for the way it drives, it is like a race car compared to my 4cyl.. With the 4cyl and 31" tires, it could not even make it up hills without downshifting to 4th and then it would stay the same speed if I floored, not I can speed up while in 5th gear.. The parts TJ had 3.07 gears and mine has 4.11 so even after upgrading to 33" tires the speed on the cluster is still off by 10MPH @ 60mph(says 70 when going 60)..

I have gone through 1 tank of gas, not sure the mileage because of the cluster being so far off and I have been on it more than normal, but I am guessing 15 to 18MPG...


So, while I agree a GC V8 would of been nice, it would of been much more money and more work and the I6 with 4.11 gears has more than enough power for 33" and I am sure 35", plus I like the manual and most V8 swaps I have seen require an auto trans....


2007 Rubicon Unlimited
SRT8 6.1L Swap Auto
RE 4.5" Long Arm
37" Cooper STT MT 17" Rims
Currie G2 D60 Rear, ARB 5.13
Mopar bumpers rear DVD, LockPick, MyGig, Sirius,
Full Soft Doors
TMD Hood

2005 Inifinti G35 4 Door 6MT
Stillen Stage 3 Supercharger
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post #2 of Old 03-03-2008, 12:27 PM
CrzyWhtBy
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Sounds like a smart move given the cost and extra power, seems like it really only cost some time. I have been looking into doing a V8 and it is pricey this may be a good alternative for me as well.

"Early to finish...Late to start"
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post #3 of Old 03-03-2008, 01:15 PM
newbs
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Glad to hear how easy it was for you, now people will back off on the if your swapping just buy a new jeep or drop a v8 in. Pulling the drive train and putting in the new motor mounts takes less time then swapping all your mods and starting with a new jeep and new quarks.
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post #4 of Old 03-03-2008, 02:15 PM
Schwalby
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I think I am going to have to start looking for a wrecked 6 cyl TJ. What do you plan on doing with the other left over parts? Going to hold on to them or sell them off? Also how easy was it to sell the old 4 cyl and tranny? Just curious.

Tattoos, women and Jeeps...... I need to find cheaper hobbies.

www.jeeprally.org Great American Jeep Rally
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post #5 of Old 03-03-2008, 04:16 PM
ErnieG
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wow this is so good to hear ive been wanting to do this for such a long time but ive always been told not to ..so to hear someone has done it with ease is giving me some ideas and putting a smile on my face where did you find the wrecked tj 1500 bucks is an extremely good price. thanks for the inspiration man

98 tj nothing special im too poor :(
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post #6 of Old 03-03-2008, 06:03 PM Thread Starter
duglas25
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I sold my 4 cyl motor, trans and tcase on craigslist for $600 and I found the wrecked one on craigslist for $1500

2007 Rubicon Unlimited
SRT8 6.1L Swap Auto
RE 4.5" Long Arm
37" Cooper STT MT 17" Rims
Currie G2 D60 Rear, ARB 5.13
Mopar bumpers rear DVD, LockPick, MyGig, Sirius,
Full Soft Doors
TMD Hood

2005 Inifinti G35 4 Door 6MT
Stillen Stage 3 Supercharger
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post #7 of Old 03-03-2008, 11:18 PM
ErnieG
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i check craigslist and ebay everyday haven't come across a deal like that before i was begining to give up hope i guess ill just have to keep on it maybe something will come up. thanks again man

98 tj nothing special im too poor :(
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post #8 of Old 03-04-2008, 12:07 AM
ptowntj
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Thats a deal for a wrecked tj...was it slammed pretty good?

8 lug xj.
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post #9 of Old 03-04-2008, 06:07 AM Thread Starter
duglas25
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Here is a link to a pic from when I bought it..

http://www.jeepforum.com/forum/showt...=462430&page=2

I have seen a i6, trans, and tcase for sale for $750 but getting an entire parts car would be better..

The tcase shifter brackets are different and the steering bracket where it mounts to the frame is different and really easy if you can take it all off a parts car..

2007 Rubicon Unlimited
SRT8 6.1L Swap Auto
RE 4.5" Long Arm
37" Cooper STT MT 17" Rims
Currie G2 D60 Rear, ARB 5.13
Mopar bumpers rear DVD, LockPick, MyGig, Sirius,
Full Soft Doors
TMD Hood

2005 Inifinti G35 4 Door 6MT
Stillen Stage 3 Supercharger
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post #10 of Old 03-08-2008, 06:42 PM
dodgetk81
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congrats on the swap! Its not hard at all, just like he said. The hardest part for me was cutting off the old mounts. I dont have a plasma, so it took a while with a grinder.

97 TJ 4.0, auto, 4.5" RE long arm, 33 " MT/R's on Moabs, 4.10's, 8.8 w/Aussie locker, A to Z rockers, A/A SYE, Warn M8000, Vanco
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