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Unread 08-27-2008, 01:32 PM   #166
BioTex
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I decided to NOT do the 4.0 head swap!

I'm probably nuts, but have decided to stay carburated. I have posted my parts for sale or trade in this forums classified section, but wanted to briefly mention it here. Hope you all don't mind. I just want this stuff to go to a more needy person. I will trade all parts needed except CPS kit for a new carburator solution. My BBD is shot, so prefer Webber. I said I would keep it brief, so there you go.
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Unread 08-29-2008, 08:50 AM   #167
Kman1983
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I'm looking at a pile of Cherokee components and trying to identify the wiring as usable. If the o2 sensor is in the header is it the earlier(Renix) system and harness?? If I'm correct the '91 and later 4.0 systems have the o2 sensor in the head pipe between the factory header and catalytic convertor. I don't want to get the wrong parts...
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Unread 08-29-2008, 12:24 PM   #168
Last Boyscout
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you are correct.
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Unread 08-31-2008, 07:39 PM   #169
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4.0L Swap into '84 CJ7

Just bought a 4.0 from a '99 Cherokee with 105k miles on it that I plan to swap into my '84 CJ7. Currently I'm running the 2.5L. The engine came from a Cherokee with an automatic transmission.

I'll post pictures as I rebuild it this winter and swap this spring.

I do have some questions about transmission options....

I've got the stock 4-speed manual, what are my options for easily upgrading the tranny without a lot of modifications and possibly get a 5th gear?
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Unread 09-01-2008, 06:33 AM   #170
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Quote:
Originally Posted by kanute View Post

I've got the stock 4-speed manual, what are my options for easily upgrading the tranny without a lot of modifications and possibly get a 5th gear?
AX15. I used the one that came with the XJ donor.
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Unread 09-03-2008, 09:19 AM   #171
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check www.novak.com for tranny options. they have a knowledge base you can read through.
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Unread 09-03-2008, 02:08 PM   #172
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Yeah, I agree that the fuel injected 4.0 beats the 4.2 anyday. My wife's 86 CJ threw a rod on the 4.2, and the shop that sent me a reman motor sent me a 4.0 instead. I bit the bullet and ripped everything I could get my hands on out of a 92 Cherokee (since there is no such thing as a totaled Wrangler!) and other than working through a few bugs, it runs better and gets much better gas mileage. Thanks for the new thread - I'll be following along as well.

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Unread 09-03-2008, 02:11 PM   #173
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Yes, the 91 and later have one O2 sensor mounted between the exhaust manifold and the converter. I believe some of the other models used two O2 sensor - one in the manifold and one in the converter.

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Unread 09-03-2008, 05:14 PM   #174
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I'm picking up my 4.0 block tommorow from the yard. Came out of a 99 Cherokee with 105k miles on it, got it for $300.

In your opinions...what is the best book to get when looking to rebuild this engine. I've rebuilt a couple of engines in the past, mostly air-cooled VW's.

I've never been a fan of the Haynes manuals.

Any advice?
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Unread 09-03-2008, 05:16 PM   #175
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Quote:
Originally Posted by Last Boyscout View Post
check www.novak.com for tranny options. they have a knowledge base you can read through.
Thanks! The Novak site is great and cleared things up for me considerably. I'm definately going to buy a reman AX15 or find one in a yard to have rebuilt.
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Unread 09-04-2008, 06:26 AM   #176
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i have Haynes manuals for my xj and cj. they suck for the most part. order a FSM (Full Service Manual.) for wiring it's the only way to go and should cover the engine rebuild better than any part store repair manual.
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Unread 09-06-2008, 06:34 PM   #177
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I got a question about passing the smog test in California. I have an 83 CJ7 that I am planning on converting to a 4.0 head with MPFI from a 91 Cherokee. I will have all of the parts from the Cherokee. My question is what problems will I face in trying to get it to pass smog in California? I live in Nevada and they don't care, just as long as the sniffer test is OK. I searched on the California DMV web site but it was useless. Any info is appreciated. Thanks. Dustin.
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Unread 09-07-2008, 07:58 AM   #178
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it seems like half of my answers are go to www.cjoffroad.com . go to their 4.0 swap forum. 80% of the people on it are in Cali. if anyone can answer your Cali smog question they can. i'm not trying to run everyone off but reading that forum is where i got all my answers.
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Unread 09-07-2008, 07:25 PM   #179
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OK. I tried going to their website a few days ago and it was down. I will try again. Thanks.
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Unread 09-08-2008, 11:11 AM   #180
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that happens alot with there website
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