Originally Posted by Walkeraviator
ok im lost... what is teh difference between the 2.4 and the 2.5?
The 2.5L was the 4 banger used for many years. It is like a Mini Me of the 4.0L engine.
The 2.4L is a Mopar block that is completely different and get more power and speed. But it still did not do a great job. DC abandoned 4cylinder Wranglers with the advent of the JK in 2007.
The 2.4L was only ever used on TJs from 2003 through 2006, so getting one that has been remanufactured is difficult and way more expensive than the result is worth.
To the OP:
My 2003 SE 2.4L threw a rod on May 11 and the price from the dealership for a reman installed was $6,500! I raised another $1,500 and got me a 2003 Sport 4.0L instead.
The SE is paid for (so is the Sport) and is sitting in the driveway, deader than a doornail for now.
The motor mounts for for the 2.4L (maybe the 2.5L, too?) are welded to the frame. I believe that the 2003 4.0L ones are bolted on.
Regardless, we plan on pulling the dead 2.4L and cutting off the motor mounts. Then she will get either a 4.0L or a Chevy 350 small block V8.
The jeep motor will still require as much part replacement at the Chevy, so why not? The replacement stuff for the jeep motor will be cheaper, though, as I can get all of it brand new from WeRMopar.com as stock replacement stuff, like the computer and radiator and main wiring harness.
The Chevy will require that all this stuff be purchased from aftermarket tuners. The stuff will be great, but costly.
So I guess it depends on which block we come across first when we have the money. (The V8 *does* present a very fun picture of what it could do, though! Very interesting idea!)
My 2.4L ran great for nine years. But I used it for my DD on a daily 120 roundtrip commute for the past five. To keep up on the Interstate I usually had the pedal to the floor and frequently had it in 4th on top of that.
It was disappointingly weak. I fooled myself into thinking it was "okay" by running it to death. The thrown rod was my fault as I went through a long period of partial employment and could not afford to have her serviced properly. She started to run hot two years ago and we continued to run her flat out on the highway. I am 100% certain that my rod broke due to extended overheating. My fault completely...
Had I not mossed so much general service for that time and had taken more time to get to work and had been willing to let everyone pass me on the freeway I might still be chugging around in my beloved SE.
I ran 31x10.5s with 4.11 gears and it was okay. But 4.53 would have been better. The next size up would have been great, probably.
I ran no lift at all. I was about to put the RE BB on it, though. It would not have changed anything at all save driveline angles, and the BB never seems to cause vibrations, so it would have been fine.
I had planned to go to 32x11.5 tires on rims with backspacing a little more aggressive looking than stock. At that time I was going to upgrade to a Dana 44 and regear with a better ratio. But I never got to that point.
There is zero problems with running 32x11.5 tires on a stock TJ, no matter what you have heard. There is NO RUBBING when it is fully stuffed nor when you are at full lock with stock rims. If there is any problem at all it can be *very* slight rubbing at full steering lock, and the five minute washer fix does the trick. (I ran a friend's 32x11.5s on stock Gambler rims for three weeks to try them out on my stock SE and all was great.)
The 2.4L engine is way underrated in the Jeep world, where bigger always seems to mean better, so the opposite *must* be true. Right? (HA!)
They are actually better in the big rocks than the much heavier 4.0L if you are an experienced rock driver. The auto is particularly good at rocks. I could get a 2.4L auto through a lot more than with the 4.0L 5 speed that I tried out in California one summer years ago. I was shocked at how good the 4 banger was, honestly.
You have no reason to be defensive, protective or in need of any sort of explanation when discussing your rig. It is just as much a "real" jeep as any 4.0L rig. I loved mine, but the 4.0L *IS* more fun for me, after all those years of that higher pitched engine sound and having to push her up hills and such. The 4.0L just goes.
And my dead SE will be reborn with a lot more power. Some day. I hope...