[captflyte]

I found a rebuilt 1984 2.5 liter engine out of a cherokee for cheap. Is it the same ( within reason ) as a 1990 2.5 liter? I just wonder if I could make it work without too much trouble.

 

[AzTJ]

isn't the '84 carb and the '90's tbi??? if so I think your gonna run into a number of problems before anything gets done.

 

[daddyjeep]

I am not sure, but I think they were injecting the 2.5 a lot sooner than they even offered the 4.0.

 

[whitebuffalo]

84 will be carb'ed for sure

 

[JeeperDon]

I wouldn't go with an older engine out of anything into anything, rebuilt or not, unless it was just a short block, or a long block only a year or so back.

 

[captflyte]

Thanks. I have started to take the accessories off of my engine and am going to use a good short block for the rebuild. I think you are right about the problems with trying to adapt the carb setup to the throttle body injection.

 

[JeeperDon]

Personally, I wouldn't waste my time on a tired 2.5. I swapped in a 4.3L '02 Blazer motor 2 yrs ago when my 2.5 got old. It was the best Jeep upgrade done by far.

 

[daddyjeep]

JeeperDon, I have always thought that would be a good swap. Of course I'm a chevy guy from way back. Did it bolt up to your tranny or did you need an adapter?

 

[JeeperDon]

JeeperDon, I have always thought that would be a good swap. Of course I'm a chevy guy from way back. Did it bolt up to your tranny or did you need an adapter?

The AX-5 is not tough enough, so I went with an AX-15 (from a junk yard, $75). Then the t-case input is wrong for an AX-15, so you have to swap the t-case input shafts, or just get the junk yard t-case too. That makes the swap look like you have a 6-cyl, so Advance Adapters has everything you need from there. The nice thing about a 4.3 swap rather than a 350 is it is shorter and lighter, yet has the exact same back end as a 350, so adapters are easy.