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Old 12-12-2006, 09:53 PM   #1
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2.5 liter compatibility

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.

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Old 12-12-2006, 10:12 PM   #2
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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.

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Old 12-13-2006, 11:15 AM   #3
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I am not sure, but I think they were injecting the 2.5 a lot sooner than they even offered the 4.0.
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Old 12-13-2006, 03:06 PM   #4
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84 will be carb'ed for sure
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Old 12-15-2006, 03:23 PM   #5
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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.
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Old 12-16-2006, 02:24 PM   #6
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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.
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Old 12-16-2006, 04:33 PM   #7
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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.
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Old 12-16-2006, 11:27 PM   #8
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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?
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Old 12-17-2006, 02:27 PM   #9
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Quote:
Originally Posted by daddyjeep View Post
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.

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