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-   -   4.0 swap (http://www.jeepforum.com/forum/f8/4-0-swap-1608249/)

bgi3 09-21-2013 06:50 AM

4.0 swap
 
I'm thinking of doing a 4.0 swap from a 97 cherokee. I'm aware that I need a crank position sensor/damper kit. I'm gonna on a budget. What the cheapest why to do this.

bgi3 09-21-2013 06:56 AM

Or would it be easier/cheaper to pull the fuel injection off and put it on my 4.2

aggiejon 09-22-2013 01:35 PM

My understanding is that the obdii 96+ are difficult to make the swap onto a 258. I had a 99 4.0 and wanted to use it. However the more I researched, my mind changed to stick with an obdi 92-95

SLO_Ken 09-22-2013 03:42 PM

I'm wrapping up the same swap. Here's a link to my thread...
http://www.jeepforum.com/forum/f8/ca...-swap-1530716/

I found that the physical differences between the 92-95 OBDI engines and the 96-99 OBDII engines are pretty much negligible. The only significant differences are that the computers are not interchangeable, and there is a second O2 sensor downstream of the catalytic converter. Also, the wiring is a bit different. If you want/need to run a check engine light, you need the gauge cluster from the 96-99, since there is not a CEL lead from the computer.

If you are on a budget, you can modify your current bellhousing and make a simple bracket for your CPS instead of using the Hesco ($$$) relocation kit.

The benefits of the 96-99 OBDII system (at least for me) are:
1) They seem to be much more available where I'm at.
2) The improved diagnostic trouble codes are way more helpful.

So far, I'm a little over a grand into my swap (not including costs I've recovered by selling old parts). All I have left to do is get an exhaust welded up, then take it to the smog referee to be inspected.

I hope this helps. Have fun! :wave:

bgi3 09-22-2013 09:45 PM

Quote:

Originally Posted by SLO_Ken (Post 16226321)
I'm wrapping up the same swap. Here's a link to my thread...
http://www.jeepforum.com/forum/f8/ca...-swap-1530716/

I found that the physical differences between the 92-95 OBDI engines and the 96-99 OBDII engines are pretty much negligible. The only significant differences are that the computers are not interchangeable, and there is a second O2 sensor downstream of the catalytic converter. Also, the wiring is a bit different. If you want/need to run a check engine light, you need the gauge cluster from the 96-99, since there is not a CEL lead from the computer.

If you are on a budget, you can modify your current bellhousing and make a simple bracket for your CPS instead of using the Hesco ($$$) relocation kit.

The benefits of the 96-99 OBDII system (at least for me) are:
1) They seem to be much more available where I'm at.
2) The improved diagnostic trouble codes are way more helpful.

So far, I'm a little over a grand into my swap (not including costs I've recovered by selling old parts). All I have left to do is get an exhaust welded up, then take it to the smog referee to be inspected.

I hope this helps. Have fun! :wave:

Awesome..... thanks. I bought a 97 XY from a guy that was gonna scrape it cause the tranny went out for 425$. I think imma buy the hasco cps cause the XJ is a auto. And I would have to get a flywheel for a man. XJ. And they are rare around here

SLO_Ken 09-23-2013 10:00 AM

Quote:

Originally Posted by bgi3 (Post 16235905)
Awesome..... thanks. I bought a 97 XY from a guy that was gonna scrape it cause the tranny went out for 425$. I think imma buy the hasco cps cause the XJ is a auto. And I would have to get a flywheel for a man. XJ. And they are rare around here

My engine was also from an automatic. I got a brand new flywheel off eBay for $63 shipped. Far less expensive than the Hesco CPS relocation kit.

EDIT: looks like they're up to $66. http://www.ebay.com/itm/LUK-LFW193-F...a99f28&vxp=mtr

bgi3 09-23-2013 12:43 PM

Quote:

Originally Posted by SLO_Ken (Post 16245489)

My engine was also from an automatic. I got a brand new flywheel off eBay for $63 shipped. Far less expensive than the Hesco CPS relocation kit.

EDIT: looks like they're up to $66. http://www.ebay.com/itm/LUK-LFW193-F...a99f28&vxp=mtr

Great.... I can do that. How did you measure the bell housing for drilling.

SLO_Ken 09-23-2013 01:32 PM

Quote:

Originally Posted by bgi3 (Post 16250033)
Great.... I can do that. How did you measure the bell housing for drilling.

I followed directions/dimensions given here...

http://www.jeepforum.com/forum/f8/of...ml#post8274428

and here...

http://s551.photobucket.com/user/Mar...?sort=2&page=1

bgi3 09-23-2013 06:11 PM

Quote:

Originally Posted by SLO_Ken (Post 16251329)

Thanks.... you saved me a good bit of time and money.

bgi3 09-28-2013 01:55 AM

Quote:

Originally Posted by bgi3 (Post 16193369)
I'm thinking of doing a 4.0 swap from a 97 cherokee. I'm aware that I need a crank position sensor/damper kit. I'm gonna on a budget. What the cheapest why to do this.

edit its a 96 cherokee..... and im using my factory T4 transmission....does this make a difference?

ThisGuyUKnow 09-28-2013 07:23 AM

if you are going through the trouble to put in a 4.0 why not use a nv3550 or ax15.

bgi3 09-28-2013 03:20 PM

Quote:

Originally Posted by ThisGuyUKnow (Post 16383281)
if you are going through the trouble to put in a 4.0 why not use a nv3550 or ax15.

Cause I wasn't planning on doing the swap til this Cherokee fell in my lap and I just had the t4 rebuilt

SLO_Ken 09-29-2013 05:21 PM

Quote:

Originally Posted by bgi3

edit its a 96 cherokee..... and im using my factory T4 transmission....does this make a difference?

Shouldn't make a difference. I used a t5, which has the same case/pattern as your t4.

CSP 09-29-2013 05:23 PM

There's nothing different about the '96 an 97 engines.

bgi3 09-29-2013 06:33 PM

Quote:

Originally Posted by SLO_Ken (Post 16417201)
Shouldn't make a difference. I used a t5, which has the same case/pattern as your t4.

i didnt see this. thanks guys been alot of help. imma start jerking everything apart tomorrow and get ready for the swap. ill let yall know if i got anymore questions. thanks again.


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