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Old 02-05-2012, 03:51 PM   #1
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93 2.5 to 4.0 swap.here we go!

time to start a thread.got my engine yesterday.95 4.0 ho 121000 miles on it. it had some surface rust on it,so i tore it apart last night.going to do some scraping and cleaning.going to paint the block black and all the brackets and the valve color red.im relpacing the water pump,thermostat,and all the gaskets.maybe the oil pump and crank bearings while i have it out.here is some pics.maybe have it painted in a few weeks.
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Old 02-05-2012, 03:55 PM   #2
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Cool, I'm getting ready to swap in a 4.0l into my 94. Keep your progress and the pictures coming

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Old 02-05-2012, 04:31 PM   #3
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Keep us updated. You are doing exactly what I plan on doing to the same exact Jeep.
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Old 02-05-2012, 04:38 PM   #4
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doing to the same in my 95 right know motor mounts are burned back in and know goin to clean up motor and start to rebuild and rewire...
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Old 02-05-2012, 05:44 PM   #5
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just drained the oil out of it.getting it reary to pressure wash.i got the whole wiring harness for the engine, with computer.is it easyier to use it or use the one from the 2.5 and splice in 2 injector wires.
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Old 02-06-2012, 06:19 PM   #6
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anybody know the answer to the queston above. got me a new waterpump,themostat,valve cover gasket,and red and black engine paint.painting the block black and most of the other stuff red.pics maybe by the end of the week
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Old 02-06-2012, 07:09 PM   #7
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just drained the oil out of it.getting it reary to pressure wash.i got the whole wiring harness for the engine, with computer.is it easyier to use it or use the one from the 2.5 and splice in 2 injector wires.

Use the harness from the 4.0

Also, it would be a good idea to have new freeze plugs put in while they are are easily accessible.
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Old 02-06-2012, 08:26 PM   #8
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Use the harness from the 4.0

Also, it would be a good idea to have new freeze plugs put in while they are are easily accessible.
good point about freeze plugs.so the 4.0 harness is easier.will it work ok with my gauges.
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Old 02-06-2012, 08:30 PM   #9
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well got home and decieded not to work on the engine.but i couldnt wait to see what the red engine paint would look like so i painted the altanator brackets red.looks good cant wait to get the rest of it painted.
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Old 02-07-2012, 07:53 PM   #10
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got some more stuff painted today
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Old 02-07-2012, 08:27 PM   #11
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Everything is looking awesome! keep up the great work. I will be following this thread, Cant wait to see the end result.
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Old 02-07-2012, 09:16 PM   #12
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Everything is looking awesome! keep up the great work. I will be following this thread, Cant wait to see the end result.
thanks.going to clean and prep the block tomarrow night.going to paint the block fri night so i will be posting some pics. sun night is reasembly time
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Old 02-08-2012, 08:33 PM   #13
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i got some more stuff painted tonight.and started reassembly,then it got cold.had to come inside.got to install my thermostat,and water pump.then i have to put my timing chain and sprockets on.painting my valve cover and timing chain cover red and take my oil pan off and clean it up and paint it black
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Old 02-09-2012, 09:05 AM   #14
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Thinking of doing the same upgrade to my jeep. I have the 2.5 currently. Was it difficult relocating the motor mounts for your project? Can u use the 2.5 radiator?
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Old 02-09-2012, 10:08 AM   #15
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Dont we all just hate the 2.5. such a waste of medal and MPG's as well. I wanna throw a small block in mine
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Old 02-09-2012, 01:22 PM   #16
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That is alot of red...

You know Krylon makes a "Chrome" paint color too...
You should try that, make it look even hip-er.....

Fo shizzle?














and thank you for NOT painting the header..
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Old 02-09-2012, 08:35 PM   #17
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Thinking of doing the same upgrade to my jeep. I have the 2.5 currently. Was it difficult relocating the motor mounts for your project? Can u use the 2.5 radiator?
i dont know about how difficult thhe motor mounts are im still riding with the 2.5 for now.im getting everything ready to go in.im going to have everything ready before i swap, so hopefully i can do it in a weekend.i think that it is going to be the hardest part about the swap. i weld almost every day so i dont think it will be too bad.the radiator is the same part # for both engines as well as the altinator,power sterring pump,ac compressor
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Old 02-09-2012, 09:30 PM   #18
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no work tonight. i did pressure wash the valve cover and preped it for paint today at work in my spare time
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Old 02-10-2012, 10:51 AM   #19
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I wonder what smell will come up when you first hit up the engine for the first time.
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Old 02-10-2012, 10:59 AM   #20
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got some more stuff painted today
You should change that old exhaust manifold for the updated one...
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Old 02-10-2012, 05:35 PM   #21
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i cant get my harmonic balancer off even with the tool.any sugestions
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Old 02-13-2012, 06:59 PM   #22
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just droped oil pan to look at crank shaft and replace gasket.took timing chain cover off to replace chain and sprokets.put new thermostat and housing on and water pump.
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Old 02-13-2012, 07:40 PM   #23
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This jeep should run better then brand new off the showroom floor
Great Job "Kdub"
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Old 02-13-2012, 08:04 PM   #24
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i dont have too much more to do to the engine.oil pan gasket,rean main seal,new belt,a few pulleys and sensors i want to replace.my new tune up kit will be here tomarrow.here is some pics of the little bit i got done tonight.man its cold here and i cant stay out there too long.it sucks!
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Old 02-14-2012, 08:57 PM   #25
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got my new timing chain on,new cap and rotor and spark plugs.its coming along pretty good
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Old 02-15-2012, 08:25 PM   #26
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well i got my rear main seal,oil pan gasket, and oil pan.valve cover is on looks great.the notch on the crank shaft is straight up and the # 1 piston is all the way up.the rotor is pointed towards the oil filter and motor mount.(like if you drew a straight line through the gap between the filter and mount). when i put the cap on the rotor looks like it is in between the 1 and 5 pins on the cap.is this right or did i do something wrong
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Old 02-16-2012, 07:10 PM   #27
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i think i am shooting for march 10th is when im starting to swap everything over.what do yall think i could ask for my 2.5 and ax5 with harness and computer.127000 miles runs good burns a little oil
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Old 02-16-2012, 09:24 PM   #28
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spark plug wires installed.going to put wiring harness back on this weekend.using 4.0 harness.anybody got any injector recomendations
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Old 02-17-2012, 10:44 PM   #29
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new oil pressure sensor,water temp sensor on today.new fuel injectors will be ordered this weekend.ready for some power.swapping electric fan and air intake from my 2.5.possibly throttle body spacer.but i have read that they dont do anything for performance just mpg.any input there.going to run moble one sythetic oil in her.anybody know the trick to make the gas tank bigger, and will it work on my 93.thanks for support gettin close
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Old 02-19-2012, 10:30 PM   #30
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Gthuys I've been lazy this weekend,I did get the engine harness back on:-) I'm just about ready to swap everything.I'm buying all the fluids this week.what's the best fluids to use in the ax15 and the 231?

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