Engine change out

Tech topics for the TJ and LJ (Unlimited) models manufactured from 1997 to 2006.
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Joined: Sun Dec 04, 2011 2:57 pm
First Name: Wendell
Last Name: Blanton
Jeep Year: 1997
Jeep Model: TJ (1997–2006 Wrangler)

Engine change out

Postby wb2011 » Sun Jan 01, 2012 4:18 pm

I have a 1997 TJ Wrangler with a 4 cylinder 2.5 engine. I would like to upgrade to a 6 cylinder, is this a lot of trouble or easy enough?
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First Name: Josh
Last Name: Stasen
Jeep Year: 2008
Jeep Model: Other "non Jeep"
Location: okc ok

Re: Engine change out

Postby jjstasen » Sun Jan 01, 2012 4:47 pm

Its very simple, only two steps.
1 take old engine out
2 put new engine in

But I think its going to be harder than in sounds...
99 XJ classic, 3 link front, 4 link rear, 35''s SOLD
99 XJ sport, 3" lift, 31's SOLD
AKA Nut Gobbler
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Joined: Sun Jan 01, 2012 11:35 am
First Name: adam
Last Name: houghtaling
Jeep Year: 1997
Jeep Model: TJ (1997–2006 Wrangler)

Re: Engine change out

Postby adr0k4 » Sun Jan 01, 2012 11:00 pm

I just recently bought a grand cherokee just for the purpose of upgrading my wrangler to the magnificent I6. long story short, I just finished rebuilding the cherokee's busted transmission instead, so i can use that as a DD while I have fun in my wrangler. When I looked in to all that would have to go into the engine swap, it was pretty overwhelming. the main issue for me was that the forward engine mounts have to be grinded off and welded back on, a few inches forward. Along with replacing harness, ecu, and making sure your drivetrain can handle the extra power (i would have needed new tranny {upgrade to ax15}).
97 TJ- 2" lift, 8k lb winch
93 ZJ- rebuilding 42re tranny...
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First Name: Bryan
Last Name: Jackson
Jeep Year: 1992
Jeep Model: YJ (1987–1995 Wrangler)
Location: Moore, OK

Re: Engine change out

Postby Electricjman » Mon Jan 02, 2012 12:13 am

I am nearing the completion of swaping out the 4 cylinder in my YJ, it only takes 12 month, 3 days, 4 hours, and 6 minutes to get this far. My swap was a little more involved than going from a 4 cylinder to a 6 cylinder, but you are correct the engine mount will need to be relocated, a different ECM, wiring harness, not to mention hoses, maybe radiator, trans mount, driveshfts, and exhaust. Not to discourage you, it is very doable, but there is always more than you plan on. Look forward to hearing about your progress. Alway remember the true meaning to Jeep, Just Empty Every Pocket, memories priceless.
1992 YJ, 350 V8, TBI, 4L60, 60 Rear, 44 Front, 513 Gears, ARB, 36" IROK, BeadLock Wheels, PSC Ram Assist, On-Board Air. Fully Custom Built by Offroadokie, and Myself.
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First Name: Greg
Last Name: Lewis
Jeep Year: 1999
Jeep Model: XJ (1984–2001 Wagoneer/Cherokee)
Location: Guthrie, OK

Re: Engine change out

Postby beefsupreme » Wed Feb 22, 2012 5:35 am

If you are going to go that far, just put in a SBC

99 XJ 4.0 5M
2012 Teryx4
2003 VRSCA
2007 TRX300EX, 2x 2008 TRX90 (kiddos)

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