Results 1 to 7 of 7
  1. #1
    Join Date
    Apr 2002
    City/State
    Chesapeake, VA
    Scrambler Year
    1985 Renegade
    Year Purchased
    1985
    Posts
    1,225

    4.0 Head on my 4.2 Block

    I'll soon need to do engine work of big proportions.
    My plans are to go with a 4.0 head on my block or on a short block & eventually put F/I on it.
    I think my mill has to much wear all around to go the rebuild route, plus I've never done one & don't have the time or patience (now) to try. Hence the short block (4.2) & 4.0 head combo I'm thinking about..
    What do you think, or for now should I try to find a 304 for now or another 258...?
    Oh the combo dilemmas??!!

    Down the road I am looking towards a 4.0 HO FI but don't want to walk down that road, I want to drive my 8, that's why I'm asking these questions.
    -Mike
    Converted from 5 spd to Auto & from Carbed to FI =)

  2. #2
    Join Date
    Apr 2002
    City/State
    Nevada City, CA
    Scrambler Year
    1982 Laredo
    Year Purchased
    1988
    Posts
    87
    Mike,
    I still think putting a '91-02, 4.0L complete engine from a wreck is your best bet. It is costly to try to get your old 4.2L rebuilt and upgraded. I've seen 4.0L's lately in the Recycler from $500 to about 1200, complete, very low mileage, bolt in, all sensors and electronics, some of them even included an AW-4, 4 speed automatic, which you could bolt your D300 to (with a $150 AA adapter). Go to my website for a long discussion on this delema and what I wound up doing, costly as it was.
    http://homepage.mac.com/jefe/
    regards, as always, jefe
    jefe4x4@earthlink.net
    '82 CJ-8, SOA, 4.4L, H.O., MPI, NP435,
    D300/4:1, D44, D60, ARB's, 130:1,
    SO. CAL.

  3. #3
    Join Date
    Apr 2002
    City/State
    Martinsville, NJ
    Scrambler Year
    1981 Mostly Stock
    Year Purchased
    3
    Posts
    545
    Mike...

    Here are some real costs, I'm in NJ, for getting your motor rebuilt. I've just got mine back this week.

    Head....
    To have the head redone, Which includes, Hot tank and wash Head, and all its parts. Resize all valve guides, Grind all valve specs, cut seats, Lap valves and seats, Mill head true, Vacume test cooling and chambers. Asemble head and seat on block.
    Cost $191.00

    Block....
    Hot tank and wash block and its parts. Bore and hone cylenders, (I had to go 30 over). New Bearings, freze out plugs, pistons, rings, tapits, rods, cam and cam bearing. Asemble motor, leaving me the oil pan, timming chain cover, valve cover to seat.
    I purchased all the parts, as I was orgianaly going to rebuild the motor myself, but at the last second, decited to have it done.
    Cost $803.00

    The deal I made with the guy rebuilding my motor was that since it was the begining of summer, and I did not have all my $$$ together, that he could use it as filler. It took a little longer but it cost me less by about 10%

    So all total with all the parts the total bill was $1,500.00.

    I now have a motor that should last me 150K++

    Good luck with your rebuild!

    Vinny
    81 CJ-8 Mostly Stock, Midnight Matalic Blue, 4 Seater, 258, T-176, PS, PB, Full White Soft Top, 31" BFG's, Stainless Trim. New Jersey, USA.

  4. #4
    Join Date
    Apr 2002
    City/State
    Middle of No Where and Too Far From Any Where, Tn
    Scrambler Year
    1982,1983,1984
    Year Purchased
    1988
    Posts
    4,590

    sorry guys for busting your bubble

    for that kind of money you can get a complete long block from Jasper engines and get a 3year/75000 mile warranty-JC



    when i did mine 2 years ago the complete long block was around $1000.00
    My opinions do not reflect those of the vast majority of people-The Sawzall is my friend and it talks to me!
    I AM THE SCRAMBLER HACK!

    www.sceniccity4wd.com

  5. #5
    Join Date
    Apr 2002
    City/State
    Chesapeake, VA
    Scrambler Year
    1985 Renegade
    Year Purchased
    1985
    Posts
    1,225

    Re: sorry guys for busting your bubble

    Originally posted by mulescj8
    for that kind of money you can get a complete long block from Jasper engines and get a 3year/75000 mile warranty-JC
    I did think about going with a short block,
    I take it that a 4.0 L long block doesn't come with FI already, right? I wish-
    -Mike
    Converted from 5 spd to Auto & from Carbed to FI =)

  6. #6
    Join Date
    Apr 2002
    City/State
    Camas, WA
    Scrambler Year
    1982 Scrambler 6cyl
    Year Purchased
    2001
    Posts
    107

    Arrow

    According to the Jasper website a rebuilt 1994 4.0 and 1984 4.2 are both $2060 each, WITH exchange, ouch! Is there somewhere else where they are cheaper or are the prices just going through the roof? A local machine shop with a good reputation quoted me about $900 for a complete rebuild.

    Ben
    1982 CJ-8 258, T5, D300, pretty much stock, 168k miles

  7. #7
    Join Date
    Apr 2002
    City/State
    Martinsville, NJ
    Scrambler Year
    1981 Mostly Stock
    Year Purchased
    3
    Posts
    545
    Hey all....

    My rebuild was a bit more pricey, and I knew it would be, because I had a desire to replace ALL or most of the components. The only old parts I uesd over were the pistion push rods and the crank. I could have used the tapits and rods over, but did not want to. Looking back at the recipt I also picked up a new water pump, and fuel pump and some other small items. I went with a Crane Cam instead of stock, just cause I could, so that added some $$ to it.

    As for Jaspers, Recently I have heard so discouraging comments about them. Nothing concrete, but, When I replacesd my Chevy V6 in my work Van I went with a ProFormance Rebuilt motor instead of Jaspers. The Proformance Motor was $1,150.00, which was a lot less then what I was being quoted for the Jaspers by some of the shops and the Jaspers web site.
    81 CJ-8 Mostly Stock, Midnight Matalic Blue, 4 Seater, 258, T-176, PS, PB, Full White Soft Top, 31" BFG's, Stainless Trim. New Jersey, USA.

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