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  1. Engines & Drivetrain
    So i am going to change my engine oil and am a bit confused about which one to buy well I know it should be 5w 30 API SN SM but in my local auto part store which has most stuff for VAG group cars and Volvo has 5w 30 but I’m different variants that some are a lot more expensive than the others...
  2. WJ Grand Cherokee Forum
    Hi All, I noticed that my front passenger side CV Axle boot is ripped on my 2001 4.0 Laredo. I was told that the Mopar boots are more durable than the ones on the new aftermarket axles. I am a bit conflicted on what to do. Is it worth doing the boot only or should I replace the whole axle? If...
  3. WJ Grand Cherokee Forum
    Weird sound I’m having this weird sound in the car radio is off everything is off when I hit the gas it goes away it’s ear piercing when the hood is open and it happens but when in the car it sounds like it’s through the radio it has the straight 6 you can hear the sound around the 30 second mark
  4. ZJ Grand Cherokee Forum
    Hi i just finished up a 75% done Ax-15 swap on a lifted 96 GC and for the life of me i cannot find where to wire the reverse switch on the side of the transmission. If there is any wiring from the Tcm i can tap into for a switch in the interior i will take that too. I'll take wiring diagrams...
  5. WJ Grand Cherokee Forum
    Smoke tested to find gross leak. I couldn't find any cracked lines but tons of smoke came out of the cap on this hose. Is this normal inside of the cap doesn't look like it would seal easy.
  6. YJ Wrangler Technical Forum
    Hello guys, i’m in the middle of an aw4 swap to my 4.0 HO YJ, i got a wintershifter and the control kit from Radesign. How can i locate the solenoid wires? Is there any other surprises should i expect (flexplate, cranshaft sensor…)? thank you!
  7. Engines & Drivetrain
    I'm installing the rocker arm assembly on my Jeep Cherokee but I'm having trouble. The rocker arms themselves are crooked and are not resting on the valve stem. The pushrods are seated on the lifters, I've checked, but they are coming close to the cylinder head. The bridge has a crook to it, but...
  8. ZJ Grand Cherokee Forum
    Hi, Working on the old Jeep after it's been sitting for a few years. Doing a full *** rebuild, found 1-tons, etc. When I pulled my pistons I noticed #1 and #6 connecting rods we're significantly bowed. (pics below; #2 rod in the middle for reference) One or both of the motor mounts were...
  9. ZJ Grand Cherokee Forum
    Now I did it. Will not start, no compression. Ok, for the long version. I was having low compression on cylinder 1. So I decided to change out the head because I believed it was a valve issue. I had a donor head resurfaced. When I took it all apart it appeared the head /valves were not the...
  10. ZJ Grand Cherokee Forum
    Long story short, I started to change my head because I thought I had a bad valve, Old head / valves looks fine so I suspected the cam. So before I pulled anything I set TDC according to the harmonic balancer and used the distributor to make sure I was at TDC on cylinder 1. (Spark was at 1) When...
  11. Engines & Drivetrain
    I currently have a 4.0 engine that just crapped out on me. Rod knock and is looking like an engine rebuild. I don't want to sell the car because I finally finished the interior before competition safety requirements. I'm trying to do rallies, unconventional already I know. Due to class rules...
  12. ZJ Grand Cherokee Forum
    I am looking more if this can be done. My 4.0 has developed a issue, it feels like low compression in a cylinder. Basically it has a shake at low idle, but it seems to run ok and the vacuum is ok and the mileage is not that bad, so I am going to have to do a compression test and see. It does...
  13. New Members/Introductions
    I am new to Jeeps, just traded an old Ford Ranger for my Jeep Grand Cherokee and loving it so far, however I have found a plethora of issues with it already, on the second day of owning it the climate control stopped working, air comes out of the vents very weak, also the oil pressure started...
  14. XJ Cherokee Technical Forum
    How's it going y'all! I've been capitalizing on this pandemic time to rebuild my Renix 4.0. Unfortunately, while pulling out the engine, I broke a sensor on the side of the block. I've been struggling to identify what it is. Seems like all of my Renix literature shows a sensor in this location...
  15. TJ Wrangler Technical Forum
    Hello fellow jeepers. So I have a weird issue. The ignition coil capacitor on my jeep is missing the hardware to ground it to the block. I have no idea how it happened, everything was mounted up properly a week or so ago. I went to check my oil yesterday and it was just dangling next to the...
  16. XJ Cherokee Technical Forum
    I've been able to make i happen twice but no more. I get my 4.0 started, it runs (great, I might add) for about 1-2 minutes then stops like it was just simply shut off. The first time - I charged the battery thinking that was it - with a 1.5a 12v "quick" charger for about 15min. It started...
  17. Engines & Drivetrain
    Hi all, So I am rebuilding my 02 WJ 4.0. I bought new cam bearings, due to scoring them when pulling the cam. :frown2: My current understanding; The #1 bearing has a oil channel that appears to feed oil to the thrust plate. I learned older 4.0 had a thrust spring that pushed the cam back...
  18. New Members/Introductions
    Hey everyone, my name is Ammon Smith. I recently purchaced my third XJ. 1998 4.0 4x4. I will be embarking into deep water and probably trying things that haven't been done before. With my background in engineering and my main hobby in woodworking i am hope to build the ultimate overland XJ...
  19. Engines & Drivetrain
    Here's my story, I have a 2001 Jeep Cherokee XJ, 70,000 original miles. I bought it with the misfire. The guy said he was driving it home from work that very day when it started misfiring, I was already on my way to pick it up. So he took a couple hundred bucks off our agreed upon price hoping...
  20. Engines & Drivetrain
    My 03 TJ 4.0 engine is dead, it knocks very loud. I am thinking of either picking up one from the junk yard or buying a rebuilt one online. If i go the rebuilt route, Does anyone know of any quality websites to buy one from? also a rough price of what just the engine swap should cost in labor...
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