View Poll Results: Drop in a rebuild 318 or keep the jeeps heart and rebuild

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  • Drop in a rebuild 318

    20 60.61%
  • Drop in the jeeps inline six heart rebuild

    13 39.39%
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Thread: jeep motors

  1. #1
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    jeep motors

    Hey not to sure on what to do...318 is alot of power but then alot more gas...and well it fat! so the jeep over all height will be more...but then the inline six is well old...has no balls...so looking for some help here has anyone done the swap? is it a good idea or what and who think i should do it?

  2. #2
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    is it an 89 or a tj

    if it is an 89 4.2 then pull it out

    it it a tj with a 4.0 then keep it
    95 yj on ford 60's, 4.3, 700R4, Flipped 300 and 38's

    R.I.P. www.kanrok.com R.I.P.

  3. #3
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    It is a YJ the tj in my name was a Effed up now i cant change it lol

  4. #4
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    the 318 probly won't use that much more gas than your 4.2
    OF4WD 5435
    2dr - 2010 - Rubicon
    Cake bakers united

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    really? so is it worth the swap? im doing a frame off in nov so is my plan anyways

  6. #6
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    If the 318 is rebuilt and tuned properly it shouldn't use much more than a tired old I6, really not talking about much more CI between the 2.

  7. #7
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    You need to be aware of the other things that might need to be upgraded when you start dropping in large motors though. Depending on the hp your 318 is going to put out you might want to upgrade the axles while you are doing your resto, then there is the tranny and t-case. Lots to think of with swaps like this, when I had my YJ I started out thinking of a SBC swap and gave up after I did all my research. If you have the time, space and ability to do most of it yourself the V8 swap is really nice

  8. #8
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    so more aless the 318 would kill my axles and tranny so on? the tranny wont take it? and same with the axles? im not going to be beating it that bad..or so is the bad...but if i do the 318 i pretty much need a hole new drive train?

  9. #9
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    I'd go with the 318. Jeeps are pretty light in weight, that motor won't have to work at all and probably will be better on fuel. Wouldn't it be nice to drive up hills with your foot barely on the pedal instead of to the floor with 20 cars on your bumper? If your doing a frame-off your already in deep, might as well do it right the first time. Also I don't know much about yjs but I don't think there is any reason for keeping the existing drivetrain, your going to end up replacing it anyway.my 2 cents
    Last edited by 84cj7; 06-26-2008 at 09:35 PM.
    84 CJ7

    03 Hummer H2

  10. #10
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    well I don't think a 318 is going to bolt up to the tranny that is in your jeep right now (I could be wrong though) so that would be one other thing that needs changing. The 231 t-case would be fine and your axles will be okay too unless you want tires bigger than 35" or you have a really heavy foot.

  11. #11
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    Smile

    This thread has me remembering Scotty the Engineer on Star Trek saying (with accent) "But Captain Kirk, she can't take it anymore!".
    JEEPERS DO IT DIRTIER

  12. #12
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    Just do as much research as you can, this and other related forums are full of info to help you make your decisions.

  13. #13
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    all i want for tires are 33/13.5...and im not hard on the jeep unless need to be....as for the hills ya my jeep i have to down shift to make some hills...but if i must put in a new tranny...what one bolts to my T-case? i heard there is a guy on another 4x4 site im on in the middle of one so gonna see what he thinks aswell

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    well im thinking about 4.0 stroker now because the 318 sounds like way way to much work...i didnt do my research on it like i should of...but i have been looking into the 4.0 stroker doesnt seem to to bad...any input on this idea?

  15. #15
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    I would do the 318 Swap as I have alredy done it for a YJ Customer (Toofargone on here) But since this is a 89 with a 4.2L I would not even think about wasting money on a stroker since the 4.2L has a wopping 110HP and a HO 4.0L is 190HP and is alot easier to install using all the same parts you have with a few extra's Need of coarse... I did the HO 4.0L into My CJ a Few Years ago and it is a huge Improvement over the Carbed 4.2L.

    Good luck with which ever way you go...
    1989 Jeep MJ: 4.7L Stroker, 4WD Swap, 97+Conversion, RC Long Arm Upgrade Kit, 35x12.5x18 Mickey Thompson MTZ's, WJ D30, WK SRT8 Rear D44 w/approx. 8" Lift
    1983 Jeep CJ7: SOLD

  16. #16
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    so the 4.0 is what you think i should do

  17. #17
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    I voted 318 But Really I think the 4.0L HO engine would be your Best decision and Keeps it Bolt in with Jeep parts and fairly inexpensive...

  18. #18
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    Quote Originally Posted by Jeepman View Post
    I would do the 318 Swap as I have alredy done it for a YJ Customer (Toofargone on here) But since this is a 89 with a 4.2L I would not even think about wasting money on a stroker since the 4.2L has a wopping 110HP and a HO 4.0L is 190HP and is alot easier to install using all the same parts you have with a few extra's Need of coarse... I did the HO 4.0L into My CJ a Few Years ago and it is a huge Improvement over the Carbed 4.2L.

    Good luck with which ever way you go...
    I heard my name...
    Dude if you want to see and feel what a 318 feels like I'll try and hook up with you. Do you get around the Hammer any time? or around Jeepmans Shop? I will let you have a look at my Jeep. As stated Alex did the swap in my truck. I love the V8 and would not want to go back to a 6cyl.

    You know what I voted.
    86 CJ Juggy
    67 Chevy Step side
    79 C20

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    AX15 transmission
    Last edited by toofargone; 06-27-2008 at 08:59 PM.

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    4spd auto

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