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231 heads on a 225?

Discussion in 'Early CJ5 and CJ6 Tech' started by SLB, Sep 12, 2012.

  1. Sep 12, 2012
    SLB

    SLB New Member

    Rockdale , Texas
    Joined:
    Mar 5, 2009
    Messages:
    8
    I have recently cracked a head on my Dauntless . I have a set of heads on the shelf from a Buick 231. Is this swap possible ? If not can you get after market heads ? Thank you for any comments.
     
    SLB, Sep 12, 2012
    #1
  2. Sep 12, 2012
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
    Joined:
    Mar 4, 2003
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    5,473
    A lot depends on the heads, but the general answer is no due to passage differences. You need to dig into Pat G's book for details on fit and possibilities.
     
    Warloch, Sep 12, 2012
    #2
  3. Sep 12, 2012
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
    Joined:
    Sep 23, 2002
    Messages:
    12,530
    Just to clarify what Warloch said, he was referring to Pat Ganahl who wrote a book specifically on GM V-6 engines back in the 80's. Tons of good info on the Buick V-6. Not in print iirc but they show up on E-pay, Amazon.com, etc.


    Sent from my iPhone using Tapatalk
     
    nickmil, Sep 12, 2012
    #3
  4. Sep 12, 2012
    wheelie

    wheelie beeg dummy 2024 Sponsor 2023 Sponsor

    York, PA
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    Mar 6, 2004
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    According to the book mentioned above: " From 1961 through 1976 the Buick V-6 used the same cylinder head,.........." So, an odd fire 231 head should fit. Problems arise when trying to use the later even fire heads on an odd fire engine.
     
    wheelie, Sep 12, 2012
    #4
  5. Sep 12, 2012
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
    Joined:
    Mar 4, 2003
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    Yup - I just can never get Pat's last name right unless I have it in front of me (which I didn't).
     
    Warloch, Sep 12, 2012
    #5
  6. Sep 13, 2012
    SLB

    SLB New Member

    Rockdale , Texas
    Joined:
    Mar 5, 2009
    Messages:
    8
    Thanks to everyone for the info. I'll try to get some info on cast numbers to find out what year model the heads I have are.
     
    SLB, Sep 13, 2012
    #6
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