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Camd94224 04-03-2013 03:49 PM

Possible engine swap
So a jeep grand cherokee came into where i work for an oil change and some routine maintenance long story short it has a 5.9l engine in it.. So i was thinking since the 4.0s are swapped from cherokees i was wondering if its the same for the 5.9? Or maybe the 5.2? Idk tell me what you guys think.. I was planning on doing a 4.0 swap soon because i have really bad engine knock on #6 pistion.. Is this swap even worth doing?


SnowdogMarc 04-03-2013 11:47 PM

I think but don't quote me on it...the 4.0 should be almost a drop in swap for your 4.2. I just finished a 4.3 Vortec swap in mine and love it. I can easily tow my tent trailer with 33's at highway speeds in 5th gear.

Camd94224 04-04-2013 03:52 PM

If i go with the 5.2 or 5.9 it wil be going carb... I dont want to mess with the efi..

SnowdogMarc 04-04-2013 04:42 PM

If you get the wiring harness and computer from the donor vehicle it's not that hard of a swap. I had the throttle body injected 2.5 originally and went to the MPI Vortec V6 and it was a huge difference in power and fun driving. Don't be afraid of going'll have to change the fuel pump and add some sensors to the exhaust but it's worth it in the long run.

Camd94224 04-04-2013 07:31 PM

Yea i wont be able to get the harness because mit likely the car will be crushed and have to cut the engine out...

Camd94224 04-05-2013 05:32 PM

Im torn between a chevy 350 or a chysler 360. Both of them would be getting a 650 doubble pumper my dad has in my basement, a mild to extreme cam, will the ax15 hold up to it? Because i do not want to mess with pinion angle on the junk rear axle. Iv been tryin to get an 8.8. I can get one out of an exploror but it has the 5.0. Will it still have 4.10s?

SnowdogMarc 04-07-2013 12:03 PM

The 8.8 is available with 4:10's but your going to have to look at the tag to see what it has. I got mine out of a 97 Exploder and got disk brakes and posi as well. As for the Ax-15 holding up to the all depends on how you drive it. If your going to beat on it I'd say go with a GM manual transmission that came with a 350 especially if your going to be hopping up the motor. Just remember that it's a Jeep not a Civic and they don't handle like a sports car lol.

SnowdogMarc 04-07-2013 12:18 PM

Don't let EFI scare you away from not putting it in. I had the 2.5 in mine and now have a 4.3 MPI fully functioning OBD2 engine from a 98 Chevy pickup in mine. Having a functioning live scan OBD helps so much when your trying to figure something out. I did have an issue with 3 sensors throwing codes at first but looking at the codes and wiring diagrams I found out they all were missing a shared power. Connected power and it all worked great. I know you don't have the elevation changes like we have in Alberta but it's nice to have a motor that can change it's fuel delivery and keep the motor running like a top with a change of 5,000 feet elevation. With my old motor it was set to about 3,000 feet and up around 7,000 it would take all you could do just to keep it from stalling out. I've been close to 9,000 with the new 4.3 and not so much as a single hiccup.
Just something to keep in mind if you're going to keep the Jeep.

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