Official 4.0 swap thread - Page 14 - JeepForum.com

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post #196 of 429 Old 10-30-2008, 01:08 PM
Stan99
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1978 CJ7 
 
Join Date: Aug 2007
Location: Antioch
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Im getting ready to place my order to hesco for my wiring harness. I know I should just thin the one I have out but I want to get this thing done and not burn it to the ground. So my question is I need the speed sensor for the T-case. Am I stuck getting the one from hesco or can I find one at the local pick-n-pull? I rather not spend that 125 there. Let me know!

Oh I am running the 258, bored .30 over, cam, rockers, 4.0 head and the MPI off of a 93.


1978 Jeep Cj7 Soa, Shackle Reversle, 36x13.5x15 Irocks, 4.5 Stroker MPI, Dana 300 twin Sticked, 4.88's
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post #197 of 429 Old 10-31-2008, 12:00 PM
Stan99
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Bump. Nobody???

1978 Jeep Cj7 Soa, Shackle Reversle, 36x13.5x15 Irocks, 4.5 Stroker MPI, Dana 300 twin Sticked, 4.88's
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post #198 of 429 Old 11-01-2008, 10:22 PM
stopthevoices77
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I just finished putting a 4.0 from a 98 Cherokee into an 84 CJ. And it actually started!!! I was somewhat of a novice mechanic before this project started. Thank God for the internet hahaha. Here are a few things I found out durring the course of this project...
-If you have an OBD II 4.0 out of a 96-99 Jeep, use the ECM from a Wrangler Sport. It is the only one that is guranteed not to have the Security module.
-Most parts can be found used at a junk yard, Except... CPS relocation kit, T for installing temp sending unit, and speed sensor with a mechanical and electrical out put (for the ECM and the gauge). All of these can be purchased through Hesco.
-An electric fan is easier that installing a new water put (to center the fan). However, there are clearance issues with the old fan pully. This can be overcome by installing the electric fan off center towards the passenger side.
I wasted a lot of money buying crap that I did not need or did not work for this application. I think I could have done the complete transplant for under $1700 had I known then what I know now. Heres what I would have needed...
Engine with Harness intake and exaust manifold included ($450)
CPS kit from Hesco ($289)
Fuel pump 2 line to 1 line conversion kit from hesco with regulator and pre-filter
Speed Sensor with mechanical and electric output from hesco
Alternator and Harness from junk yard
Power steeing pump with pully from junk yard
ECM from Junk yard
Electric Fan from Ebay
PDC with fuel pump relay, Automatic shutdown switch and starter relay from junk yard
Air cleaner kit (cheap on ebay)
Wiring diagram (downloaded for $11)
Section of exaust with front O2 sensor from junk yard.
T with threaded insert for Temp Sending unit from Hesco.

This is of course a very budget minded build. I suppose I just got lucky that all of the crap I got from the junk yard actually worked...
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post #199 of 429 Old 11-01-2008, 11:28 PM
coas
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You could have done it for less had you didn't bought all that from Hesco...

84 CJ7 , Dana 44 rear D30 front, 258, 4.0 head, MPFI, e-fans, T176, Dana 300, 31x10.5x15 and Mustang hydroboost.
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post #200 of 429 Old 11-15-2008, 12:27 AM
coas
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The Alt. wiring is simple, regulator from pole #20 at the ECU connector and #57 for the sense wire. the third wire is the BAT pole to the PDC.

84 CJ7 , Dana 44 rear D30 front, 258, 4.0 head, MPFI, e-fans, T176, Dana 300, 31x10.5x15 and Mustang hydroboost.
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post #201 of 429 Old 11-19-2008, 09:48 PM
clintb
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1982 CJ7 
 
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4.0 carb swap

I just picked up an 80 CJ7 with a 4.0 already in, Badly I might ad, and has a Clifford manifold. I have been identifying stuff to fix and have a question about the intake. My other CJ7 has a hose to the intake that I believe is coolant? The Clifford has a couple large fittings, one on each end. Is this new manifold in need of a coolant hookup or am I looking a large vacuim lines?
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post #202 of 429 Old 11-23-2008, 03:18 PM
Last Boyscout
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a picture would be a big help. is the 4.0 OBDI or OBDII? if you're not sure check the fuel rail. does it have a fuel return to the tank? if so it's an OBDI. they have to be vacuum lines since the 4.0 does not have any coolant running to the manifold. if you can post some good pics we can tell you what you have.

STEP 1: BUILD IT!
STEP 2: BREAK IT!
STEP 3: REPEAT!!!!!
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post #203 of 429 Old 11-24-2008, 01:22 PM
clintb
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Photos

Pix are on photobucket. Checked Clifford manual on line and said manifolds are water heated so that probably answers my questions. But will use compressed air to verify.
http://i472.photobucket.com/albums/r...ntsjeep001.jpg
http://i472.photobucket.com/albums/r...ntsjeep002.jpg
http://i472.photobucket.com/albums/r...ntsjeep003.jpg
The engine is of unknown origin am trying to get some numbers to use to reference but have not gotten done yet, has alum valve cover and a sticker on front of valve cover. Are there other ways to determine genre of a 4.0. Injection is gone.

Last edited by clintb; 11-24-2008 at 01:59 PM.
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post #204 of 429 Old 11-24-2008, 03:00 PM
VaCJ79
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Since I was looking a rebuilding my 258 and adding FI, this seems like a better option. With my budget I need to be able to keep my T150 trans for a while longer. Will I be able to just bolt the 4.0 right to it? I think I read somewhere I might need a different pilot bushing?

1979 CJ7 258 / 4.0 head / J20 power Steering / T150 Dana 20 / EMU YJ 2" lift / Custom front bumper

Looking for : Please PM, Carter 2 barrel Carb before you through it out
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post #205 of 429 Old 11-24-2008, 08:09 PM
whittlecj
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Quote:
Originally Posted by clintb View Post
Pix are on photobucket. Checked Clifford manual on line and said manifolds are water heated so that probably answers my questions. But will use compressed air to verify.



The engine is of unknown origin am trying to get some numbers to use to reference but have not gotten done yet, has alum valve cover and a sticker on front of valve cover. Are there other ways to determine genre of a 4.0. Injection is gone.
click free.
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post #206 of 429 Old 11-25-2008, 04:05 PM
Last Boyscout
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if the injection is gone you can make it what ever you want. do you have the ECM? if you do then you will want to match the ECM or buy another to go OBDI or II your choice.

STEP 1: BUILD IT!
STEP 2: BREAK IT!
STEP 3: REPEAT!!!!!
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post #207 of 429 Old 11-25-2008, 04:08 PM
Last Boyscout
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VaCJ79, yes you will need a new bushing. just contact Hesco, AA, or Novak. your true question is the CPS. mod the belhousing or relocation kit.

STEP 1: BUILD IT!
STEP 2: BREAK IT!
STEP 3: REPEAT!!!!!
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post #208 of 429 Old 11-25-2008, 05:35 PM
VaCJ79
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Last, The relocation kit seems to be the easist thing to do but expensive, unless I can get it cheaper somewhere other than Hesco. I added up all the parts and its looking like 700 without the engine/ rebuild .

1979 CJ7 258 / 4.0 head / J20 power Steering / T150 Dana 20 / EMU YJ 2" lift / Custom front bumper

Looking for : Please PM, Carter 2 barrel Carb before you through it out
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post #209 of 429 Old 11-26-2008, 07:40 AM
Last Boyscout
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I too used the relocation kit. After spending the $289 and looking at some forums about modifying the bell housing I wished I grown a set and done the bell housing. If you have the engine out mounting the bell housing and fabbing a bracket for the CPS location wouldn't be very hard. You would need a 4.0 flywheel. But if you prefer to bolt on use the kit.

STEP 1: BUILD IT!
STEP 2: BREAK IT!
STEP 3: REPEAT!!!!!
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post #210 of 429 Old 11-28-2008, 07:39 PM
clintb
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4.0 and oil pressure switch?

Does anyone know if the 4.0 has an oil pressure switch? I have a 4.0 put into an 80 cj7 and have no place to plug the oil pressure switch. Am thinking will have to jumper it as there is only place for pressure sender? Inless I have missed it.
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