So if no one buys my TJ because it's a 4 cylinder (see for sale section), I'm curious to know what is involved in "upgrading" my Jeep to a 6 cylinder engine. Besides the computer, engine, and fuel pump is there anything else? What about the transmission? Will the 6 cylinder connect right up to it? Any ballpark idea on expense for this type of work?

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2005 Wrangler Rubicon
4.6L Stroker Engine, Flex-A-Lite radiator & electric fan, 4.5" BDS Short Arm lift, 33x12.5/16 Mickey Thompsons, Bestop TrailMax Pro 2 interior, Bestop NX soft top, Bushwacker 6" flares, and much more

**Prior Jeeps**
Wranglers 1989, 1998, 2005
Liberty 2003 & 2004 Renegade

Which 4 cylinder do you have the 2.5 or the 2.4?

Besides engine, all computers and wiring harnesses, fuel pump, you will also need to weld in new motor mounts, IIRC a new crossmember, depending on the engine, you may need a new bell housing for the tranny, or a new transmission altogether. You'll also need a new radiator, driveshafts front and rear, and if IIRC a new power steering pump.

Honestly, for the time effort an money... Forget the 4.0 it's a great engine, but it's performance gains over the 4 cylinder just aren't that huge. If you are going to do an engine swap, do a SB V8. It will be the same amount of work, and relatively the same amount of cash, plus the gains will be much better.

**Edit - Looked in the for sale section, you have the 2.4, so I believe you just need the bell housing for the 4.0l NSG370 **

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- Mike
'12 JK

Jeep Tech Files

I am pretty sure that the NSG370 has an integral bellhousing that can't be swapped???

The 2.4 has more HP than many I6 jeeps. To me, a bigger concern would be the D35.

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LOST # 633
'05 KJ 3.7L/6spd/241 245/75/16 MT's
'88 MJ 4.0L/AW4/231 SWB HPD30 & trac-loc D44 w/3.73's
A dirty Jeep is a happy Jeep

go to www.jeepforums.com and look around. there
are a few guys that have done the swap with relative
ease.

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2004.5 dodge qclb
smarty powered / isspros
2005 sivler lj
http://s303.photobucket.com/albums/nn13 ... ider_2008/

Are you sure its a Sport and not a SE? All sport had I6, if it's the 98 SE it has the 2.5. I ve herd it a pain, and not worth the money for that swap!!

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1997 TJ, 4 banger, banks monster,
6" skyjacker rr long arm with nitro shocks,
33" bfg at's on mt classic locks,
d44 front & back with 4.88's and detroits
" Who needs a trail, just make your own!"
Member:Tread Heavily, Eglin Hard Hitters

Doesn't matter anyway anymore, he already traded it in on another KJ.

wonder if he kept the tires and wheels, they would look so good on mine! or his after he lifts it. I bet after he was down with all of us doing that last lift he just couldn't bear to drive the Wrangler anymore

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MUDD'S MOTORSPORT'S We do IFS lift installs ,
03 OVERLAND EDITION /Kilby-Skidrow-Mopar-4XGuard skids/ 2.5 inch TOTAL CONTROL JBA coilovers -JBA Arms/MOABS-31 FALKEN WILDPEAK AT3W / 4.10's etc, 04 Kilimanjaro Edition loaded, plus 05 KJ limited