Waytec Posted August 23, 2010 Share Posted August 23, 2010 Good day everyone So I had a little booboo think my 95 XJ wheeler :cry:. Plan A I was offered a 4.0 out of an 97 XJ for really cheap from a friend. I was wondering what is involved in getting it to work in the 95 XJ? Is it a direct swap sensors and drop it in set up. Plan B I have a 4.0 out of 94 that I was going to put into my 90 MJ. What I am thinking is I am going to put it in my 95 XJ and get the 97 4.0 and make it work with the 90 MJ. What is in evolved in getting a 97 4.0 to work in a 90 MJ The help is very much aspirated. Link to comment Share on other sites More sharing options...
kyleag89 Posted August 23, 2010 Share Posted August 23, 2010 Just swap the block of which ever motor you want into any vehicle and retain all the sensors, intake, exhaust, and wire harness from the old motor. Link to comment Share on other sites More sharing options...
Automan2164 Posted August 23, 2010 Share Posted August 23, 2010 :eek: I bet it still runs. 8) Got to love the 4.0L Rob L. :D Link to comment Share on other sites More sharing options...
Waytec Posted August 23, 2010 Author Share Posted August 23, 2010 :eek: I bet it still runs. 8) Got to love the 4.0L Rob L. :D Nope can't see it but snapped the cam shaft as well. Link to comment Share on other sites More sharing options...
Automan2164 Posted August 23, 2010 Share Posted August 23, 2010 :eek: I bet it still runs. 8) Got to love the 4.0L Rob L. :D Nope can't see it but snapped the cam shaft as well. Shucks. Must have been one hell of a noise... :D Rob L. Link to comment Share on other sites More sharing options...
cracker Posted August 23, 2010 Share Posted August 23, 2010 Wow. That looks nuts. Link to comment Share on other sites More sharing options...
Waytec Posted August 23, 2010 Author Share Posted August 23, 2010 Just swap the block of which ever motor you want into any vehicle and retain all the sensors, intake, exhaust, and wire harness from the old motor. All the sensors will work? Will I have to relocate or modify the sensor or the harness for any of them. Link to comment Share on other sites More sharing options...
Geonovast Posted August 23, 2010 Share Posted August 23, 2010 You should be able to reuse all your old sensors, although you may have to use your origial distributor(if it's any good). The CMPS connector was changed at some point. The cam in the 97 will be different than your current one(other than it being in one piece), but that's not an issue. My brother's 98 XJ has a 91 4.0 in it, and it runs great. Just had to swap the sensors and dizzy from the 98 motor onto the 91 motor. Have you posted these pics before? I know I've seen'm. Link to comment Share on other sites More sharing options...
Waytec Posted August 23, 2010 Author Share Posted August 23, 2010 when it went I was under acceleration going up a small hill on the highway and it sounded like a rock had been knocked up under the XJ. and then I had no power and there was a black mist coming from the back of my rig. Link to comment Share on other sites More sharing options...
Waytec Posted August 23, 2010 Author Share Posted August 23, 2010 No I have not posted on this sight just CJA and NA4WDA local off road clubs. I will be going from 97 4.0 down to a 95XJ and a 94 4.0 XJ down to a 90MJ. Same deal just swap the sensors over to the new engine. so the exsust and Intake manifolds will work. what is the CMPS connector. "sensors and dizzy from the 98" what's the dizzy. Link to comment Share on other sites More sharing options...
jimoshel Posted August 23, 2010 Share Posted August 23, 2010 gonna take two pieces of duct tape to seal that pan. Took a 4.0 out of a 2001 XJ and put it in a 88 MJ. Just swap the sensors. And the diz. Keep the manifolds with the engine. Link to comment Share on other sites More sharing options...
Geonovast Posted August 23, 2010 Share Posted August 23, 2010 CMPS is your camshaft position sensor, it's for injector control. You can't realistically swap the sensors without destroying them, so it's easier to swap distributors. Dizzy = Distributor. I KNOW I've seen those pics before, but I can't remember where from. Could have sworn it was here. Link to comment Share on other sites More sharing options...
fiatslug87 Posted August 23, 2010 Share Posted August 23, 2010 All you need a stronger oil pan :rotf: I KNOW I've seen those pics before... I'm sure many "rods through the pan" pics are similar :yes: Link to comment Share on other sites More sharing options...
dunl Posted August 23, 2010 Share Posted August 23, 2010 And here I have been telling Waytec all day that I was sure that you couldn't take a 97+ engine without using all the interior gauges....I thought some were reverse polarity or something? Link to comment Share on other sites More sharing options...
Geonovast Posted August 23, 2010 Share Posted August 23, 2010 The engine isn't really any different. The sensors are, so you put the 95 sensors on the 97 engine, and you'll be fine. Link to comment Share on other sites More sharing options...
dunl Posted August 23, 2010 Share Posted August 23, 2010 Good to know.....guess I'll get to check it out in person. :) Link to comment Share on other sites More sharing options...
Geonovast Posted August 23, 2010 Share Posted August 23, 2010 One issue I can think of, however(and I'm not sure on years), is that the 97 motor may not have the tapped hole in the back of the head for the gauge temp sender. Link to comment Share on other sites More sharing options...
HOrnbrod Posted August 23, 2010 Share Posted August 23, 2010 One issue I can think of, however(and I'm not sure on years), is that the 97 motor may not have the tapped hole in the back of the head for the gauge temp sender. I have a 97 head on my stroker. It has the tapped hole for for the gauge temp sensor. The casting number for the 96-99 heads is 0630. I've never seen a 0630 head w/o the tapped hole, although I've read reports that it's possible. Link to comment Share on other sites More sharing options...
Geonovast Posted August 23, 2010 Share Posted August 23, 2010 Good to know. :thumbsup: I definitely remember reading at one point that an 01 didn't have the tapped hole, so it must be with the 0331. Link to comment Share on other sites More sharing options...
terrawombat Posted August 23, 2010 Share Posted August 23, 2010 Go with Plan A. Look at it this way - at least you got a free corrosion resistant barrier on the underside of the XJ out of the ordeal. Link to comment Share on other sites More sharing options...
Waytec Posted August 24, 2010 Author Share Posted August 24, 2010 Thank everyone for the info. Now that i know it will work I just have to find some time to get the work done. As it looks right now it won't be until October until I get to pull the engine out of the donor. Link to comment Share on other sites More sharing options...
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