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231 fuel pump question

Discussion in 'Early CJ5 and CJ6 Tech' started by wlkrpines, Sep 9, 2010.

  1. Sep 9, 2010
    wlkrpines

    wlkrpines Member

    FERNDALE, MT
    Joined:
    Mar 22, 2008
    Messages:
    61
    I picked up an inexpensive 231 for a swap for the 225 that had a hole in a piston.

    The 231 has no fuel pump. Should I get the mechanical or switch to electric? Does it need a return line? Will the pump from the 225 work?

    It has the stock 2bbl.

    Thanks for the help
     
    wlkrpines, Sep 9, 2010
    #1
  2. Sep 9, 2010
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
    Joined:
    Sep 23, 2002
    Messages:
    12,530
    If the 225 pump is in good shape it will bolt up and should work. Volume should be comparable as should the pressure. I've switched them between Buick 340, 350, 300, 225, 231, and 252 with no issues. YMMV as there can be differences in years of the timing covers.
     
    nickmil, Sep 9, 2010
    #2
  3. Sep 10, 2010
    wlkrpines

    wlkrpines Member

    FERNDALE, MT
    Joined:
    Mar 22, 2008
    Messages:
    61
    Thanks Nick,

    I never had any issues with the one from the 225. I'll give that one a try.
     
    wlkrpines, Sep 10, 2010
    #3
  4. Sep 10, 2010
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
    Joined:
    Sep 22, 2002
    Messages:
    8,360
    For an example, I pulled the pump off of my '78 231 and put it on my '67 225, and it worked fine..
     
    Patrick, Sep 10, 2010
    #4
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