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Thread: 1988 Jeep comanche AKA the penny sniffer

  1. #346
    Registered User robertf03's Avatar
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    looks like a space ship


    how bad is the oil leak that you cancelled a trip?
    ...

  2. #347
    Registered User zebvance's Avatar
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    about a quart every 100 miles, and getting progressively worst. Rear truss is panted gray and is now looks completely black. Whole undercarriage is covered in oil.
    1988 Comanche auto, 4.0, 4x4, 8.8 rear trussed, Dana 30 trussed, SYE np231, Serious Offroad long arms, 9.5" of lift, 35's, lockers

  3. #348
    lowballing someone
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    you don't need to spend the money on head work etc on the stroker. you also only need to upgrade valve train and or springs if you were building something crazy. if your set on stroking no need to buy a kit. just get a 4.2 crank and rods from a free to cheap 4.2 a set of oversized pistons of whatever bore you want from a stock rebuild kit. a stock 7120 4.0 head and go. if you upgrade the cam to a hesco rv06b you will need some minor head work to seat the new valve springs as the head needs to be machined slighly.
    stock stamped rockers are fine way past 300 hp. i just built a 4.7 that is going into my jeep as soon as i measure for push rods.
    Red 81 CJ5, 35's, 4.10 and detroit, 4 to 1 dana 300, tbi efi, flat belly, cage, chromos and auzzie in front... sometimes runs. body damage to come

  4. #349
    Registered User robertf03's Avatar
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    city motor supply

    se habla espanol

    $905 for the premium 87 to 90 4.0
    Last edited by robertf03; 04-09-2015 at 09:48 AM.
    ...

  5. #350
    Like my rock crawler? KrazyKarl02's Avatar
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    Is the PCV valve clogged? Or can you just take it out, put a hose in there, direct to a bottle to catch the oil. Then keep rocking!
    -Karl
    2006 Chevy K3500 4X4 - No J.B. Weld on it yet!
    1982 thru 94 F-Series "The Klogger" AKA Transport on the road, on the trail, or on the trailer!
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  6. #351
    Registered User zebvance's Avatar
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    Quote Originally Posted by KrazyKarl02 View Post
    Is the PCV valve clogged? Or can you just take it out, put a hose in there, direct to a bottle to catch the oil. Then keep rocking!

    Had a oil catch can. That controlled the most of the blow by. The problem now is blowing out gaskets as soon as I replace them. I have no Pcv valve with the renix set up. It is a CCV (crank case ventilation system) set up. No valves just vent hoses basically... all hoses are clean and new. No clogs anywhere. The low compression is the cause of the build up of excess crank case pressure (more than the CCV system can cope with) that is causing seals to fail.
    1988 Comanche auto, 4.0, 4x4, 8.8 rear trussed, Dana 30 trussed, SYE np231, Serious Offroad long arms, 9.5" of lift, 35's, lockers

  7. #352
    Registered User zebvance's Avatar
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    Quote Originally Posted by colman View Post
    you don't need to spend the money on head work etc on the stroker. you also only need to upgrade valve train and or springs if you were building something crazy. if your set on stroking no need to buy a kit. just get a 4.2 crank and rods from a free to cheap 4.2 a set of oversized pistons of whatever bore you want from a stock rebuild kit. a stock 7120 4.0 head and go. if you upgrade the cam to a hesco rv06b you will need some minor head work to seat the new valve springs as the head needs to be machined slighly.
    stock stamped rockers are fine way past 300 hp. i just built a 4.7 that is going into my jeep as soon as i measure for push rods.

    Yes I am not that knowledgeable with them as of now. Just getting my feet wet and still researching. I just went over to the Jeepstroker forum and plan on spending a lot of time reading up before I start swiping the card.
    1988 Comanche auto, 4.0, 4x4, 8.8 rear trussed, Dana 30 trussed, SYE np231, Serious Offroad long arms, 9.5" of lift, 35's, lockers

  8. #353
    Rock and Roll AggieTJ2007's Avatar
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    a few points for you to consider

    -An LS motoer, even the iron block motors weigh less than a 4.0
    -They are shorter and only slightly wider than the 4.0 with the huge intake hanging off one side
    -LS motors and 5.3's in general run very cool, 4.7L stroker motors are hard to keep cool
    -You will have a hard time building a 4.7L to match the HP of a vortec 5.3, they may rate them lower but they usually dyno closer to 350HP

    LS swaps are getting easier and easier, if you don't want to tons of power swap in a 4.8L
    Quote Originally Posted by afroman006
    Creighton, you have done stuff with that jeep that would make a goat go "holy ****!"
    Quote Originally Posted by afroman006
    So driving by brail is why your jeep looks the way it does eh?

  9. #354
    sam_hodnett's Avatar
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    Quote Originally Posted by AggieTJ2007 View Post
    a few points for you to consider

    -An LS motoer, even the iron block motors weigh less than a 4.0
    -They are shorter and only slightly wider than the 4.0 with the huge intake hanging off one side
    -LS motors and 5.3's in general run very cool, 4.7L stroker motors are hard to keep cool
    -You will have a hard time building a 4.7L to match the HP of a vortec 5.3, they may rate them lower but they usually dyno closer to 350HP

    LS swaps are getting easier and easier, if you don't want to tons of power swap in a 4.8L
    This.
    "Political correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

    "It's not cheating if you pay for it"

  10. #355
    Registered User zebvance's Avatar
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    Quote Originally Posted by sam_hodnett View Post
    This.

    yes but they are wider where it matters most. Where the headers go. There for interfering with the "frame rail" which then translates to block huggers or notching the frame...
    1988 Comanche auto, 4.0, 4x4, 8.8 rear trussed, Dana 30 trussed, SYE np231, Serious Offroad long arms, 9.5" of lift, 35's, lockers

  11. #356
    Registered User robertf03's Avatar
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    hes been driving around on a dead cylinder, you could tell him a reman 4.0 was 500 hp and hed probably believe it

    5.3 seems like such a horrible idea. its already barely a jeep, youd be throwing out all of the drivetrain and probably some sheetmetal.
    ...

  12. #357
    Registered User zebvance's Avatar
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    This is a perfect example for the people that think a v8 swap will be a piece of cake.

    http://www.naxja.org/forum/showthread.php?t=1007477

    Not say its not awesome and that once its done it will be worth all the work. Its just simply more time, money, and work than I want to get into. Too many little hiccups here and there that I don't want to deal with. For me my goal is more power and easiest install. Time is worth more than money (to a reasonable extent) to me at this point. Owning a business and having a full time job plus getting married in less than a year, translates to me not having that much free time, and my goal is to get his thing back on the beach asap. Because when I do have free time, thats where I like to spend it. I appreciate everyone giving their opinions, that's what forums are about, helping others and giving them advice. But for me a 4.0 stroker is the best choice right now.
    Last edited by zebvance; 04-09-2015 at 02:31 PM.
    1988 Comanche auto, 4.0, 4x4, 8.8 rear trussed, Dana 30 trussed, SYE np231, Serious Offroad long arms, 9.5" of lift, 35's, lockers

  13. #358
    Resident Ricer Sparling's Avatar
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    Sounds like you need a bare bones long block replacement for the stock motor.

    You're over thinking this motor swap, but I can see this ending up like your d30, expensive, overbuilt, and still not as good as a pretty much stock one step up to the next level.

    D30 < D44
    6 cylinder < Chevy v8
    '91 Bronco 351w, ZF5, D44 TTB, 9" rear swap with disk brakes, 37" toyos, method wheels, mastercraft seats, A/C and heat

  14. #359
    Like my rock crawler? KrazyKarl02's Avatar
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    In all truthfulness, a stock 4.0 Long block would probably be cheap, easy, and do just fine. If you want to go mudDing, get a stroker. Want to crawl, get gears.
    -Karl
    2006 Chevy K3500 4X4 - No J.B. Weld on it yet!
    1982 thru 94 F-Series "The Klogger" AKA Transport on the road, on the trail, or on the trailer!
    1965 Chevelle
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  15. #360
    Treasurer cjwiththexj's Avatar
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    I've been thinking about this same subject for my Cherokee. I want to put a V8 in it, that's my dream, but I will probably just go with a 4.0 stroked.

    check this out for idea on the V8 though: http://www.novak-adapt.com/knowledge...ine_mounts.pdf
    C.J. McDougal
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