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Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > The 5.2/5.9 swap guide for YJs

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Unread 11-20-2013, 06:42 PM   #16
skyj
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Quote:
Originally Posted by SH00T3R View Post

Yeah I ment for a OBD 1 or 2 set up
Oh I wasnt sure so I figured I would ask. Someone had mentioned to me that the notches where different on the obd2 and that the obd1 cps couldnt read it. So I did a lot more figuring and calling some auto parts stores and all of them say its the same flywheel part number for a '93 dodge ram with 11" clutch as it is a '98 ram so I think I have made my decision. Although I would never recommend getting a used clutch, the person I'm getting it from guarantee's it is in excellent shape. So I'm going to gamble with a '98 flywheel with clutch and pressure plate.

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build thread: http://www.jeepforum.com/forum/f22/skyj-eccentric-build-1467426/ '90 YJ 5.2 magnum MPI, AX15, NP231 SYE, Dana 30 4.56 open/ 8.8 4.56 detriot locker. 1" shackles
2" BL, 4" stretch all on saggy waggy springs.
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Unread 11-25-2013, 12:35 PM   #17
wrestler22115
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5.2 help

I found a 97 318 5 speed tranny for a good price. Would it be easy to swap that into my 92 YJ or find a 318 from a 92?
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Unread 11-25-2013, 09:50 PM   #18
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I don't think there would be a difference. A 318 is a 318 but if your talking about swapping in the tranny and along with it I have no idea. As long as its a ax15 I'd think your good to go.
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Unread 11-26-2013, 01:35 AM   #19
SunDevilJeeper
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How is everybody? I've been meaning to update some stuff but working 12-14 hours a day eats up a llot of time.

The 97 engine will do just fine. It's the OBD I and OBD II stuff that will be a slight issue. One of the guys on here converted his OBD II engine to OBD I and it's working just fine. Other than OBD They are the same.
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Unread 11-27-2013, 11:52 AM   #20
skyj
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What about starters? Have we discussed this yet.? Im assuming that if your using the v6 Dakota bellhousing and a ram 5.2 flywheel then you can use either or starter or will only a dakota bolt up to it? I am at that stage in my build. Can I just get a good used starter from a ram truck at a junkyard since all auto parts stores want a $50 core charge anyways?
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build thread: http://www.jeepforum.com/forum/f22/skyj-eccentric-build-1467426/ '90 YJ 5.2 magnum MPI, AX15, NP231 SYE, Dana 30 4.56 open/ 8.8 4.56 detriot locker. 1" shackles
2" BL, 4" stretch all on saggy waggy springs.
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Unread 11-27-2013, 05:33 PM   #21
SH00T3R
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HHMMMM I plan on using the stock starter out of my 5.9 but I have to use a 5.9 flywheel also so I know it will mesh up. Id think your good to go either way though.
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Unread 11-27-2013, 10:17 PM   #22
skyj
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Originally Posted by SH00T3R View Post
HHMMMM I plan on using the stock starter out of my 5.9 but I have to use a 5.9 flywheel also so I know it will mesh up. Id think your good to go either way though.
Yeah the question came up because I wanted to use the Grand Cherokee starter,
But since it bolts on the passenger side,I cannot use it with my v6 Dakota bellhousing.
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build thread: http://www.jeepforum.com/forum/f22/skyj-eccentric-build-1467426/ '90 YJ 5.2 magnum MPI, AX15, NP231 SYE, Dana 30 4.56 open/ 8.8 4.56 detriot locker. 1" shackles
2" BL, 4" stretch all on saggy waggy springs.
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Unread 11-28-2013, 11:25 AM   #23
Chris
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I wanted to add that on my 5.9 I used the factory exhaust manifolds and complete exhaust just shortened in my YJ. My motor is out of a 96 Ram 2500. I also used the 46RE trans out of that truck but my swap was slightly different than most.
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Unread 11-30-2013, 08:10 PM   #24
mike_breaker_5
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Quote:
Originally Posted by SH00T3R View Post
I don't think there would be a difference. A 318 is a 318 but if your talking about swapping in the tranny and along with it I have no idea. As long as its a ax15 I'd think your good to go.
there are some pretty significant wiring differences b/n obd1 and obd2. i believe the largest problem lies in the nss, security fetuses, and most of the emissions crap.

i would add an anti-wrap bar to the list also. i replaced my stock springs with HD replacements, i wrapped them in less than a week with some decently aggressive driving.
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Unread 11-30-2013, 09:49 PM   #25
SH00T3R
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Quote:
Originally Posted by mike_breaker_5 View Post
there are some pretty significant wiring differences b/n obd1 and obd2. i believe the largest problem lies in the nss, security fetuses, and most of the emissions crap.

i would add an anti-wrap bar to the list also. i replaced my stock springs with HD replacements, i wrapped them in less than a week with some decently aggressive driving.

Good call on the OBD1 and OBD2 stuff. I wasn't thinking about the wiring.
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Unread 12-01-2013, 12:25 AM   #26
JCashen
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I've read that it is a waste of time and money to try to do dual exhaust.

My question is would it be possible to route it like you would if you did a y-pipe but instead ran them parallel or side by side.

Also if I could get a 5.2 or 5.9 for the same price what would be better? I know there isn't much difference between the two.
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Unread 12-01-2013, 01:11 AM   #27
Randonexplosion
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Quote:
Originally Posted by JCashen View Post
I've read that it is a waste of time and money to try to do dual exhaust.

My question is would it be possible to route it like you would if you did a y-pipe but instead ran them parallel or side by side.

Also if I could get a 5.2 or 5.9 for the same price what would be better? I know there isn't much difference between the two.
Not sure why you would want to. IMO there aren't really any performance gains with dual exhaust on a stock motor. It can be done, but running them side by side would be just as much of a waste of space as running them down each side. Then trying to fit 2 mufflers on the same side.

If they were the same price I'd go with the 5.9. I don't know that there are many differences between the two except for internal displacement (power). GM 4.8,5.3 & 6.0s are all the same externally.

Sorry for jumping in the Magnum thread guys
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Unread 12-01-2013, 04:53 AM   #28
mike_breaker_5
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Quote:
Originally Posted by JCashen View Post
I've read that it is a waste of time and money to try to do dual exhaust.

My question is would it be possible to route it like you would if you did a y-pipe but instead ran them parallel or side by side.

Also if I could get a 5.2 or 5.9 for the same price what would be better? I know there isn't much difference between the two.
i tried for almost a year to make a true dual setup with long tubes work. it did fit, but it was so tight under there that i rattled it apart no fewer than 6-8 times. i had it put under there 3-4 different ways and each time the tight quarters would rattle the drivers side apart no matter what i did. i tried welding, stainless band clamps to allow a little give, rubber hangars, none of it helped.

the only way i see you can make a true dual setup work is if you were able to put the mufflers and cats directly after the headers on each side. but by doing this you are going to be raising your under hood temps considerable to where any performance gain will be choked away.

as far as 5.2 and 5.9 choice...
i wouldn't see how it matters, they are very similar in aftermarket support availability. as far as performance goes, i would see the potential in the 5.9 as the biggest factor if choosing it. other than that i would say which ever one you have available at the best price with a full donor would make the swap easiest.
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it's not much to look at... but it's mine.
5.2lswap, metalcloaks, bedliner, tucked belly, d60's, soon to be nv4500 and d300.
http://www.jeepforum.com/forum/f22/m...r-junk-990191/
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Unread 12-01-2013, 04:55 AM   #29
mike_breaker_5
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oh... i forgot. i think the 5.9 uses a different balanced flywheel. can't remember which way it goes. 5.2/5.9 one is internally balanced and the other is externally balanced.
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it's not much to look at... but it's mine.
5.2lswap, metalcloaks, bedliner, tucked belly, d60's, soon to be nv4500 and d300.
http://www.jeepforum.com/forum/f22/m...r-junk-990191/
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Unread 12-01-2013, 05:31 AM   #30
JCashen
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Quote:
Originally Posted by mike_breaker_5 View Post
oh... i forgot. i think the 5.9 uses a different balanced flywheel. can't remember which way it goes. 5.2/5.9 one is internally balanced and the other is externally balanced.
Thank you, that is very good info. Is it possible to make the 5.9 internally balanced? I read that it is possible to use the 4.2 flywheel/clutch on the 5.2 since it is internally balanced.
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