2.5L Rebuild - Jeep Wrangler Forum

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Old 08-15-2014, 10:09 AM   #1
Texas2070's Avatar
Join Date: Mar 2012
Location: Starlight, IN
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2.5L Rebuild

I've been working on getting my frame sandblasted and repainted to prevent rust. Obviously to do so everything comes out of the jeep. Body, engine, transmission, axles, gas tank, all gone.

As everyone knows the 2.5L is lacking in the power department. So after having it out I figured why not take it apart and "clean it out". The only problem with this is I've never taken an engine apart before.

To get to the point, what should I replace to improve performance. I assume piston rings and seals, but I don't really know what else. I'm not really interested in altering the engine any, such as putting in new cams or increasing displacement. Also any tips on taking an engine apart for a newbie like me.

Thanks a lot
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Old 08-15-2014, 03:39 PM   #2
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Join Date: Aug 2012
Location: Da Region of NWI
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Just thinking.....

I have a 98 TJ with the 2.5 automatic. It's at 127K now with no problems and passes emissions. If I had to replace my motor, I would look into swapping a used 6 cylinder in and save the anguish and labor of rebuilding the 2.5 (Just my thought) I also heard of a 318 Mopar swap into the TJ but had not read up as much on it.

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Old 08-16-2014, 01:34 PM   #3
Join Date: Dec 2013
Location: Roswell NM
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If I were you I would take it to a well established machine shop and explain your situation. In Albuquerque I use Anderson Machine shop. They will rebuild the engine for you and do a few things to improve performance such as boring it out, increasing the crank clearances to the max available, possibly a performance cam etc. Some would say port the heads but that is really more for high revving engines, not to much of an affect on a 4 cyl. Good luck.
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