'93 grand needs a new 4.0
my brother in law asked me to help him put a motor in a jeep for him he just bought('93 grand, auto,4.0) anyway the guy he got it from had it on the dunes, ran the temp gauge way up then drove it home boiling over. so that motors toasted. what i need to know is can i use just any 4.0, or certain years. can it be out of a yj and just use the same mounts off the old block?? etc. any info on this would help alot. thanks in advance.
Originally Posted by doozer
im with t to the j on this one. once you drive a 5.2, you wont want to touch another 4.0, and my 5.2 gets the same, fi nto better gas mileage than my 4.0 did
1998 5.9 Limited
- Full Kolak Exhaust (ML's FM70) - FIPK2 - APS 52mm TB - MSD Blaster SS - A3923's - Magnecor's - MP ECU - 180 robertshaw t-stat - Relocated IAT - E.H. M1 - B&M Trans Cooler
- Addco 1.25" Military front & 7/8" rear sways - Edelbrock IAS shocks - OME S.S - Stilens Front & Rear
Coming Soon :
Level10 Stage 3 46RE - WJ knuckle conversion
Originally Posted by Saleen4971
Originally Posted by 96grandcherokee
Originally Posted by T to the J
Go ahead try it (swapping to the 5.2), your gonna need a new transmission, computer, wiring harness, and the sensors are definitely not the same. Stay with the 4.0, it's a direct swap, and it'll last a lot longer than the 5.2 with proper care and maintenance. A 4.0 engine from a 92-98 XJ, ZJ, or TJ will be fine as long as it's the EFI motor. You may have to swap motor mount brackets, fuel rail, intake & exhaust manifolds, and accessory brackets. It's not that big of a deal if you have time, tools, and mechanical ability. I just did this on my 93 ZJ, took about a day from the time I lifted the hood till I drove it out of the shop. The donor motor came from a 92 XJ, and I had to swap everything I mentioned above.
When you do the LS7 swap get ready for a long summer watching your Jeep sit in the driveway. Do you really know what an LS7 is? That isn't going to fit without MAJOR changes to the frame and MAJOR suspension upgrades, not to mention serious driveline changes. You planning to stay with the factory axles, tcase, transmission? You're talking big block Chevy 454, stock was something like 465hp. AIN'T GONNA HAPPEN..............
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