Where do I find a 4.0 rebuild kit?

[Catphe10]

Hello everyone, I just purchased my first Jeep yesterday! 97 wrangler sport 4.0 I6. So i got a good deal on it knowing that i needed to rebuild the engine, do to very high miles. 220,000 is what i was told. I have been searching for a day and a half now with out much success. What I am trying to do is just a very mild build with reliability and longevity in mind. Where should it start looking for a good kit to rebuild the 4.0? my normal go to, summit, doesn't carry much of what i think i need.
Also the kits i have found all have dished pistons, anywhere from +10cc - +28cc, why is this? can i run flat top pistons if i can find them? Just Fyi here is the process im planning on doing. i will be having the block machined and painted as long as the local shop says its still good.

Any help would be greatly appreciated!!! Thanks,

 

[Chris]

220k miles is considered "low miles" for a properly maintained 4.0 (they'll go well beyond 600k).

How did you come to the conclusion that you need to rebuild your engine? Did you do a compression test or something else?

You're not going to find a "kit" for engine rebuilds to my knowledge. You may find a kit for the gaskets and seals, but that's about it. Everything else you'll have to determine what can be re-used and what can't.

 

[Catphe10]

With only having it for a day i haven't hand a chance to do any test. The only thing i know right now is there is a knock in the motor. the guy i got it from said his mechanic told him that the #3 cylinder had a broken piston skirt and/or a bad rod bearing. I dont think that is really whats wrong but i have not had much time to start messing with it yet. sense i am fairly mechanical and have rebuild a handfull of motors, i figuered it would just be easier to strip it down and start from bare block.