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MuddinBo
10-09-2012, 11:56 PM
Anyone ever done a motor swap in their xj? If so what did u swap it to?
TUWdave
10-10-2012, 05:47 AM
Hey Carson,
I'm planning to swap out my 4.0 and trans for a GM LM7 V8 and a GM 4L60 4 speed w/OD auto trans. Goal is more power and torque and better MPG than the 4.0. The LM7is lighter than the 4.0 too. This is a pretty radical change I'm told but am looking forward to the challenge. Take a look a the Novak site for info on this swap and other engine swaps. In the knowledge section on the left, click on engines for this and other engine options. http://www.novak-adapt.com/knowledge/gm_generation_III_v8.htm

The most popular swap is the build a stroker from your 4.0 or get one already built. Sure the stroker swap is a good choice too.
4.3LXJ
10-10-2012, 06:52 AM
I did the same thing with a 4.3L Chevy. It is a radical change. If all you do is the engine, not bad except for the cooling aspect. But plan on venting the hood and getting a good aftermarket radiator with some cooling capacity. The hard part is thing like AC, transmission linkage and stuff like that, and making it clean. Lift is manditory
TUWdave
10-10-2012, 07:00 AM
Steve,
Did you get your 4.3 with all the accessories? Good idea to do so, right? Saves time and money in the long run I think.
Later................
4.3LXJ
10-10-2012, 07:04 AM
Yes I got a complete engine, however I bought a Painless wiring harness for it because the original was not in very good shape. But, you will have to get some custom power steering hoses. To get the AC to work properly, I had to convert over to a Sanden Compressor. Stuff like that. I run dual electric fans I fabbed up.
MuddinBo
10-10-2012, 01:18 PM
What's the biggest motor you can fit in an xj? With out cutting the hood .or with out an aftermarket hood do y'all no?
prerunner1982
10-10-2012, 01:55 PM
What's the biggest motor you can fit in an xj? With out cutting the hood .or with out an aftermarket hood do y'all no?

I would be surprised if anything larger than a small block V8 would fit in there without any body panel modifications.
4.3LXJ
10-10-2012, 02:09 PM
Small block V8
07Negative
10-10-2012, 08:54 PM
I'm thinking of a hampster and wheel. Petrol is too damn expensive.
cantab27
10-10-2012, 10:02 PM
got a dude putting a 5.7 hemi in his xj down here over the xmas hols......

going in dans one....

http://www.xjtalk.com/showthread.php?t=6833
07Negative
10-11-2012, 12:52 AM
unless this fella knows what the hell he is doing. That 5.7L is going to cost him/her a copious amount of money in repairs. i can't even believe Chrysler thought it would be a good ideal to put a 8.25" in a SRT8.
cantab27
10-11-2012, 01:51 AM
unless this fella knows what the hell he is doing. That 5.7L is going to cost him/her a copious amount of money in repairs. i can't even believe Chrysler thought it would be a good ideal to put a 8.25" in a SRT8.

how so....
Jeepster19
10-11-2012, 10:29 PM
Has anyone tried to put a BBC in one?
4.3LXJ
10-11-2012, 10:55 PM
Trust me, not enough room. Small block is bad enough
TUWdave
10-12-2012, 06:42 AM
701
Picked up a GM LM7 V8 yesterday. See attached