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4.0l
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  1. YJ Technical Discussion
    Hello all, I have done a great deal of work on my 88 4.2 thus far. While I am pretty happy with the progress, I am not sure if it would be able to handle long-distance drives due to age. I am thinking of a few options: 1) Rebuild current engine - already changed alternator, carb...
  2. TJ General Discussion
    Hi all! My 1998 2.5L just isn't cutting it anymore, starting to show little bits of rust all over, and I've already replaced the motor in it once. I've had it for 7 years but I given me a good chunk of trouble. I have heard the inline 6 cylinders are tough and common (should I need parts). I'm...
  3. Classifieds Archive
    Clean, well maintained LJ that has been converted to a halfcab pickup by Rubitrux of Boone, NC. It's been in my family for the last few years, used a runaround rig. 110,XXX miles. 4.0L with the auto. The motor is super strong and the trans shifts smooth. Trans did undergo a rebuild approximately...
  4. General Jeep Discussion
    hi my friend, last year I tryed to build an offroad-only jeep's...staying with the stock 4.0l engine but with a turbocharger. At my first try, (1999 4.0l with 180 miles) I just put a checkvalve before the map sensor and running at 8psi aaannnd 2 hour later a connecting rod was threw outside the...
  5. TJ Technical Discussion
    So I've got an '01 TJ with the 4.0l L6 in it, approximately 175k miles. Valvetrain was having some issues, eventually engine developed a nice metallic banging noise. So we figured probably need to pull the motor and check it out. So far, no smoking gun for the banging noise, nothing in the...
  6. TJ General Discussion
    I have a 2006 Wrangler with the inline six, 4.0L engine with only 80k miles and well taken care of. It's all stock. Trying to track down an oil drip. It's at the front of the engine. Leak is only a couple drops a day. Had a mechanic tell me it may be from a warped valve cover. Is this a trait of...
  7. TJ Technical Discussion
    So in take off it grinds but after that no issue. But then theres another problem when I'm in 4 or 5 at low revs(anything below 3grand) it slips. the nosie has been going on 4 about 10000 miles(I know kind of late) but not the sliping it occured recantly. I have been planning for the clutch but...
  8. TJ General Discussion
    Hi Everyone, Looking to get back into the jeep world, want to buy a 4.0L manual TJ. I've gathered up a bit of info on the 0331 heads, but I can't seem to find definitive info on which years are prone to piston skirt failures (if not all of them?). My understanding is I want to avoid 2000 and...
  9. TJ General Discussion
    Hi everyone, I've been using this forum to get me out of trouble with my TJ for quite a while, but this is my first post. I've scoured the web trying to get a definitive answer on this, but have so far just confused myself. I hope you guys can help. I recently had a bolt shear off my piston...
  10. Xmas Day 2017

    Heading out to wheel in the Cascade Mountains
  11. TJ Technical Discussion
    I Just bought a 2001 TJ 4.0L with 280k miles on it with a blown engine and new nv3550 with only 5k miles on it for $1500. I recently found a used engine at a salvage yard with 116k miles for $795 and a 6 month parts warranty. I was wondering if 116k miles was too high to bother with swapping...
  12. Where's My Jeep?

    There was at least 6" of snow that morning, I measured it at the time but can't remember now. It was a great day. :-) Drive to work was fun as heck, and so beautiful. Snow makes everything better.
  13. Snow Fun!

    One of my favorite pics from last year. Co-worker and I went wheeling in last winter's snow. We found between 6-12", depending on where we were. This pic was in about 6" of snow. We had a GREAT time!
  14. Beginning to look different

    Shortly after I bought it, still looks stock but starting to change. New tires, clear marker lights. Repair of mechanical problems are underway...
  15. TJ Technical Discussion
    Hello, I just recently joined the forum but I have been using threads from here as resources for some time now. I'm a fairly competent mechanic however this Jeep had me starting to question my abilities to fix vehicles. Unfortunately I was under the belief that all 4.0 engines were bulletproof...
  16. JK Pics Forum
    Figured i'd post a few pictures of my new project. 2000 Jeep Wrangler TJ sport 5-Speed Manual 4.0 Liter 129,000 Miles This is my first jeep, just got it about 2 weeks ago and I am ecstatic to dive into it! Tell me what y'all think! Modifications (All done by the previous owner, I have big...
  17. TJ General Discussion
    My jeep decided to take a turn on me - by breaking a connecting rod. After replacing the timing chain, push rods and lifters it was confirmed by my mechanic. I am leaning towards getting a new used engine, but am not sure if doing a rebuild would be a better route, or getting a crate engine some...
  18. Classifieds Archive
    2000 Jeep Wrangler Sport (TJ) 5 Speed Manual 4.0 L 136k Miles Color: Grey $9,499 OBO - NO Trades This Jeep runs great and needs no work. I don’t need to sell, I just want something a little more practical for a daily driver, since I never take it off road anymore :(. I have owned this Jeep for...
  19. TJ Technical Discussion
    Long time reader, first time writer.:) Have an '06 Sport 4.0 manual that I made some improvements on about 5 years ago. 4" lift, 4:56 gears and 35" tires. Has about 194k miles. In the last month or so it has started dying without warning while driving. The first time, it started right back...
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