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Engine swap

Discussion in 'Intermediate CJ-5/6/7/8' started by scbasspro, Aug 20, 2009.

  1. Aug 20, 2009
    scbasspro

    scbasspro Big Ed

    Chapin SC
    Joined:
    Nov 2, 2007
    Messages:
    63
    I have an opportunity to get a '79 cj7 with a 304 engine with an automatic trans. I plan to remove the engine and install in my '80 CJ7 with a 5speed manual trans. Question: Will the 304 install to the manual trans, without any modification or kit? Thanks!
     
    scbasspro, Aug 20, 2009
    #1
  2. Aug 20, 2009
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    23,596
    What engine is in the CJ-7 now?
     
    timgr, Aug 20, 2009
    #2
  3. Aug 20, 2009
    Michaelo

    Michaelo Member

    Neodesha, Kansas
    Joined:
    Sep 21, 2002
    Messages:
    90
    Should bolt up. Might have to change the crossmember location. I'm guessing you have a t5 behind a 6 cyl at the moment. That tranny isn't the strongest might not live long. Depends how u drive
    Posted via Mobile Device
     
    Michaelo, Aug 20, 2009
    #3
  4. Aug 20, 2009
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    23,596
    If the engine in the CJ-7 is a 258, the trans will bolt up but the engine mounts won't. If it's a 151, neither will fit.
     
    timgr, Aug 20, 2009
    #4
  5. Aug 20, 2009
    pathkiller

    pathkiller Member

    Lorton, VA
    Joined:
    Apr 17, 2005
    Messages:
    878
    You will also need a flywheel that is balanced for the 304.
     
    pathkiller, Aug 20, 2009
    #5
  6. Aug 20, 2009
    scbasspro

    scbasspro Big Ed

    Chapin SC
    Joined:
    Nov 2, 2007
    Messages:
    63
    Sorry, The engine in the cj7 is a 258 6cyl
     
    scbasspro, Aug 20, 2009
    #6
  7. Aug 21, 2009
    DrDanteIII

    DrDanteIII Master Procrastinator

    Milford NJ 08848
    Joined:
    Mar 21, 2007
    Messages:
    1,519
    yeah you will definitely need a 304 flywheel. THe motor mounts will need to be moved or taken from teh donor jeep. the bolt pattern should be the same for the bell housing. Which 5 speed do you have? the jeep 5 speeds aren't known for their ability to handle big power.
     
    DrDanteIII, Aug 21, 2009
    #7
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