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  1. XJ Cherokee Technical Forum
    Hello JeepForum, So I just discovered my timing chain is more then likely stretched on my 97 Cherokee SE, I've got a little over 210k miles so it is probably due for it anyways, but whats the best brand to replace it with. I've heard good things about Cloyes, and have had good luck with Crown...
  2. XJ Cherokee Technical Forum
    Hello all, I was hoping someone might have insight into the cause of my 1987 XJ's engine/transfer case vibration. The engine is the 4.0L inline 6 and it has an automatic transmission. There are no problems shifting so I don't think it has to do with the transmission. I also don't think it has...
  3. CJ-7
    I’m getting combustion in my tailpipe. I think. It is a popping sound that usually happens when is neutral or deceleration. I retuned my carb and still there. Is there an obvious issue? Thanks!
  4. New Members/Introductions
    hello, im kind of new to posting on forum as a whole. i have an 89 yj with the 4.2? maybe a 4.0, whichever the stock is. i have some timing and shifting issues as well as what i believe to be a low end knock and im really not sure what the issues are, help identifying them would be greatly...
  5. 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...
  6. Wrangler General Discussion
    See this... https://www.carscoops.com/2018/12/fca-developing-new-inline-six-replace-pentastar-v6/ Wonder if it will get better than the 14 mpg I'm getting with my 4.0?! :wink2:>:)
  7. Jeep Buying Forum
    2004 Jeep Grand Cherokee 4.0 Inline 6 with 91,000 original miles! White in color with gray interior. Everything works on this car and it runs great! Transmission shifts smoothly, starts right up everytime, and it has the best engine in it. My father and I are asking $4900 OBO Please call at...
  8. Engines & Drivetrain
    I recently blew my head gasket, radiator, and thermostat. I don't want to replace the gasket and have the bottom end go out on me, so I am on the hunt for a replacement motor. I would love some more power so I am considering a stroker or a beefed up 4.0L. I'd love to throw a 350 and a manual...
  9. Jeep CJ Forum
    I am trying to get my 258 4.2L amc engine to run, and the first to tackle are the vacuum hoses and where their correct locations are. When I got the jeep there were zero hoses hooked up, so thought that maybe hooking the hoses up correctly could be vital in this rebuild. Anyone have any...
  10. ZJ Grand Cherokee Forum
    Is a 1993 cat converter on a v8 interchangeable with a 1996 inline 6 on a Jeep Grand Cherokee? Thanks
  11. XJ/MJ Cherokee Non-Technical Forum
    hey guys i am having to get a new cat installed on my baby and i currently have a flowmaster super 40 muffler on it and figured since i was down there is there a newer exhaust someone could recommend me or should i just keep the old flowmaster it is only 5 years old. thanks guys
  12. Jeep CJ Forum
    I just bought a 1981 Jeep CJ7 4.2 straight 6 with a 4 speed manual. Took it to the shop to get a full tune up done, didn't have the time to get it done myself and it needed one bad. Picked it up from the shop, drove 2 miles, and the tranny went :mad:. Can't find any gear at all. Depending on the...
  13. MJ Comanche Technical Forum
    Hi guys, I have an '89 4.0L I6, I think it is an AMC motor, but I don't know where I can find that out; if anyone else knows how to check that please post! Anyway, I just replaced the stock oil pump, (it was waaay worn out inside and I was getting no oil pressure) with a high flow pump and at...
  14. ZJ Grand Cherokee Forum
    I have a 1995 Jeep Grand Cherokee Laredo 2wd with the 4.0 inline 6 with 215,678 miles on it. When the engine is cold, oil pressure is great, and everything is fine until the engine warms up. Ive been told that I need to replace the oil pump, but online i notice that there is an oil pump screen...
  15. MJ Comanche Technical Forum
    Hey I have a 1986 Jeep Comanche x with a 2.8L V6 carbureted. I've been having issues with the engine currently in the truck. Rod knock, poor acceleration, oil leak, almost no power etc. A lot of people have been telling me to go grab a 4.0L inline 6 from a similar year Cherokee. I was wondering...
  16. ZJ Grand Cherokee Forum
    After I start up my Grand Cherokee and let it run about 30 seconds, it will sputter for about 20 seconds and then run fine after that. The fuel pump was just replaced a couple weeks ago. Any suggestions as to what the problem is? specs: 4.0L I6 all stock
  17. Engines & Drivetrain
    I read through some of the older posts and there appear to be conflicting opinions on what engine is best. I have the opportunity to get a '90 with a 4.2L, the whole Jeep actually. the '90 has a ton of body and frame rot. Easiest would be a tub swap but don't think that will be possible...
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