1986 2.5 to 4.0 Swap

[Jeepjeff859]

It seems like there is information all over the place about this swap and I'm creating this as a place for people who have done it to post pictures on the way they did things

 

I'm going to try to take pictures on all the mods I had to do and try to make detailed descriptions for each pictures

[Jeepjeff859]

http://comancheclub.com/topic/39539-links-for-25l-to-40l-swap/

 

 

This is a link that Onlyinajeep726 sent me to help me do a lot of research on what I need to start this project

[Jeepjeff859]

http://comancheclub.com/topic/18588-xj-dash-harness-to-rear-mj-harness-wiring-guides/

 

This is another link that onlyinajeep726 sent me that was extremely helpful in getting started in the rear harness

[Jeepjeff859]

This is a link about messing with the fuel system. The pump mentioned worked out great for me and all I had to do was mount it and splice into the factory fuel pump wire

 

 

http://comancheclub.com/topic/36900-fuel-cell/?hl=return%20line

[Jeepjeff859]

Here is some info about the early style AX15 With a internal slav

 

At the bottom is a link to the bearing I had to use for a 1994 engine and a 1990 ish AX15 With with the smaller pilot bearing. I used rock auto to get most of the parts which showed most of clutch components had the same part numbers between years

 

 

http://comancheclub.com/topic/47697-ax15-for-40-swap/?fromsearch=1

[irvan105]

Man i really appreciate this thread. I just got my first comanche today and have had xjs and zjs with the 4.0 so i was a little sad when this had the 2.5 but it runs great so going to run it till it dies(or just really get sick of it lol) but already inprocess of looking for a 4.0 to start getting ready and this is amazing to have all the links to help me get things ready. Just wanted to say thanks.

[Jeepjeff859]

remember ; take your time and do it right first time. i made the mistake of trying to rush it and now i regret it