yj engine swap - Pirate4x4.Com : 4x4 and Off-Road Forum

FF151DJG · 10-18-2006, 10:48 AM

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i am interested in having a 6 cylinder swapped into my 90 yj. what is the path of least resistance. i am not overly mechanically inclined but i am not going to be doing it either. i have a donor 4.0 out of an 90 xj but i am not sold on the idea. i have heard everyone talk about a chevy swap but don't know what it entails.

SlowMo · 10-18-2006, 11:13 AM

I opted to replace my 4 banger with the Chevy v-6 vortec. IMHO its a better fit and just as easy as swapping in the straight 6. I went with the v-6, al460e auto tranny, and an Atlas II combination. With that combo I actually ended up lenthening my rear drive shaft, and that's a good thing. Any way you go you're looking at welding new motor mounts, new ECM, new tranny, new radiator and belt driven accesories, and so forth. So why go to all that work to end up with something you could have bought at a used car dealer?

Yota Tony · 10-18-2006, 11:22 AM

Sell your 4cyl YJ and buy a 4.0L YJ.
That's the easist way.

SlowMo · 10-18-2006, 02:45 PM

Quote:

Originally Posted by Yota Tony

Sell your 4cyl YJ and buy a 4.0L YJ.
That's the easist way.

Well yah! But an engine swap is the cool way.

4doorchevy · 10-18-2006, 05:22 PM

Quote:

Originally Posted by SlowMo

I opted to replace my 4 banger with the Chevy v-6 vortec. IMHO its a better fit and just as easy as swapping in the straight 6. I went with the v-6, al460e auto tranny, and an Atlas II combination. With that combo I actually ended up lenthening my rear drive shaft, and that's a good thing. Any way you go you're looking at welding new motor mounts, new ECM, new tranny, new radiator and belt driven accesories, and so forth. So why go to all that work to end up with something you could have bought at a used car dealer?

Slowmo did you leave it fuel injected. Thinking of doing the same thing

Sorry for the hyjack

CCJC · 10-19-2006, 09:38 AM

This spring I swapped in a 94 XJ 4.0L into my 95 YJ. There is a bunch of work, but A LOT of this transfered nicely.

Motor mounts have to be cut off and moved
Rear DS shortened
Front DS lengthened
Need all the computer stuff from the 4.0L

The radiators are the same, very little mod to the transmission mount is requried if any. However the XJ t-case is clocked lower than the YJ one. It did not really cause any issues in mine.

I am thoroughly happy with the swap

larboc@hotmail.com · 10-19-2006, 09:58 AM

Quote:

Originally Posted by CCJC

Rear DS shortened

SlowMo · 10-19-2006, 10:40 AM

Quote:

Originally Posted by 4doorchevy

Slowmo did you leave it fuel injected. Thinking of doing the same thing

Sorry for the hyjack

Yes I did. Its basically a complete stock engine & tranny from an S-10. Of course there were mods I had to do to make it fit, but surprisingly not that many. I did go with an aftermarket harness from Howell, but that was more for simplicity sake.

SlowMo · 10-19-2006, 10:45 AM

Quote:

Originally Posted by CCJC

Rear DS shortened

This is one of the primary reasons I went with the Vortec V6. I actually lengthened my rear drive shaft. Much better angles now at the u-joints. That was important to me with the amount of lift I have.

CCJC · 10-19-2006, 12:27 PM

The 4 banger DS is longer than the stock 6 cylinder.

SlowMo · 10-19-2006, 03:45 PM

Quote:

Originally Posted by CCJC

The 4 banger DS is longer than the stock 6 cylinder.

And your point?

Longer DS = Less Severe Angles at the joints = Less Wear = Less potential for breakage (etc, etc.)

So why are you "thoroughly happy" with a shorter DS?

FNG · 10-25-2006, 07:03 AM

I did very much like SloMo did, but I used a EB D20 for the t-case.
2000 Blazer 4.3L and 4L60E and ended up with a 28" rear drive shaft on a stock wheel base. Vibes are totally not an issue.

CCJC · 10-25-2006, 11:10 AM

Quote:

Originally Posted by SlowMo

And your point?

Longer DS = Less Severe Angles at the joints = Less Wear = Less potential for breakage (etc, etc.)

So why are you "thoroughly happy" with a shorter DS?

Well I am not running crazy amounts of lift and I don't have any issues. I am thoroughly happy with the extra power and both the on and off road drivability improvements

4doorchevy · 10-26-2006, 09:48 PM

what fuel pump is everyone using?

10-18-2006, 10:48 AM	#1 (permalink)
FF151DJG Registered User Join Date: Jan 2006 Member # 66283 Posts: 62	yj engine swap -------------------------------------------------------------------------------- i am interested in having a 6 cylinder swapped into my 90 yj. what is the path of least resistance. i am not overly mechanically inclined but i am not going to be doing it either. i have a donor 4.0 out of an 90 xj but i am not sold on the idea. i have heard everyone talk about a chevy swap but don't know what it entails.

10-18-2006, 11:13 AM	#2 (permalink)
SlowMo Registered User Join Date: Jan 2004 Member # 26623 Location: Cameron Park, CA Posts: 533	I opted to replace my 4 banger with the Chevy v-6 vortec. IMHO its a better fit and just as easy as swapping in the straight 6. I went with the v-6, al460e auto tranny, and an Atlas II combination. With that combo I actually ended up lenthening my rear drive shaft, and that's a good thing. Any way you go you're looking at welding new motor mounts, new ECM, new tranny, new radiator and belt driven accesories, and so forth. So why go to all that work to end up with something you could have bought at a used car dealer? __________________ This Jeep sponsered by the IRS and my tax refund.

10-18-2006, 11:22 AM	#3 (permalink)
Yota Tony Registered User Join Date: Nov 2004 Member # 39045 Location: The Rock Posts: 1,092	Sell your 4cyl YJ and buy a 4.0L YJ. That's the easist way. __________________ Anthony

10-19-2006, 09:38 AM	#6 (permalink)
CCJC Registered User Join Date: Feb 2005 Member # 42789 Posts: 109	This spring I swapped in a 94 XJ 4.0L into my 95 YJ. There is a bunch of work, but A LOT of this transfered nicely. Motor mounts have to be cut off and moved Rear DS shortened Front DS lengthened Need all the computer stuff from the 4.0L The radiators are the same, very little mod to the transmission mount is requried if any. However the XJ t-case is clocked lower than the YJ one. It did not really cause any issues in mine. I am thoroughly happy with the swap __________________ '95 YJ w/OME lift, 33" SSRs, front & rear ARB, and a Warn 8274, NOW WITH FORD 8.8 & 4.0L Chinook Country Jeep Club ECO Four Wheeling Society Calgary Jeep Association

10-19-2006, 12:27 PM	#10 (permalink)
CCJC Registered User Join Date: Feb 2005 Member # 42789 Posts: 109	The 4 banger DS is longer than the stock 6 cylinder. __________________ '95 YJ w/OME lift, 33" SSRs, front & rear ARB, and a Warn 8274, NOW WITH FORD 8.8 & 4.0L Chinook Country Jeep Club ECO Four Wheeling Society Calgary Jeep Association

10-25-2006, 07:03 AM	#12 (permalink)
FNG Registered User Join Date: Feb 2000 Member # 100 Location: Norman, OK Posts: 839	I did very much like SloMo did, but I used a EB D20 for the t-case. 2000 Blazer 4.3L and 4L60E and ended up with a 28" rear drive shaft on a stock wheel base. Vibes are totally not an issue. __________________ John

10-26-2006, 09:48 PM	#14 (permalink)
4doorchevy OUTLAW MOTORSPORTS Join Date: Mar 2006 Member # 69112 Location: MArion, La Posts: 477	what fuel pump is everyone using? __________________ 97 tj 6.0 nv4500 241c on tons in the works Last edited by 4doorchevy; 07-16-2008 at 08:45 AM.

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