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Old September 24th, 2004, 21:47
dirty devil dirty devil is offline
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swapping 87 4.0l out to 4.0 HO questions

I have a 87 which is blowing smoke and oil out the intake like there's no tomorrow.
Got a line on a 91-92 HO. I've heard about issues with the computer for the motor controlling the AW4 in some years.

Anyone have any info? tried search but didn't find anything.

any info would be much appreciated.
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Old September 25th, 2004, 08:22
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Dr. Dyno Dr. Dyno is offline
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Re: swapping 87 4.0l out to 4.0 HO questions

Just drop the HO long block into your Jeep and use all the existing ancillaries from your '87. Then you won't have any issues at all.
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Old September 25th, 2004, 09:11
dirty devil dirty devil is offline
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Re: swapping 87 4.0l out to 4.0 HO questions

Thanks dyno. So the only other change would be the cooling...either swap in a newer rad or put in a makeshift cooler cap.

I had read here a while ago that the different years had different computer responsibilities. i.e new trans had an integrated computer whereas the older trans had their own computer. Anyone remember that link? I couldn't find it.

edit.

I've found this article which seems to cover a lot.

http://www.off-road.com/jeep/cheroke...p/engswap.html

Last edited by dirty devil; September 25th, 2004 at 09:59.
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