3100 block w/3.1 heads?

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  • joejicker
    • Jun 2006
    • 3

    #1

    3100 block w/3.1 heads?

    I have a 89 z24 with a thrown rod. I bought a block I was told was a 3.1. It turns out to be a 3100. I allready have new 3.1 heads for it. Will it all bolt up?
  • Darin
    • May 2006
    • 259

    #2
    Yes the upper end will work on the 3100.

    IIRC, The front of block is a little different where the engine mount gets bolted on.
    1999 Grand Prix SE 3100
    1997 Dodge Ram 1500 4X4 Ext cab. 5.2L
    1977 Dodge Power Wagon, Short bed, Fuel injected 360, 4spd, Dana 60's, Little Red Express bed.

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    • joejicker
      • Jun 2006
      • 3

      #3
      What about pushrods with the roller cam. Oil pan? The 3100 has a windage tray.

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      • GutlessSupreme
        • Nov 2004
        • 166

        #4
        If the block's a 3100, find a 3100 top end. Sell the 3.1 heads. Trust me.
        -Tony | gtsdurango.net
        '04 Dakota Quad Cab SLT 4x4 - the gas guzzling DD.
        '90 Turbo Grand Prix STE - ehh.. I'm working on it.
        '92 Gutless Supreme SL - RIP 5.2010
        '90 Turbo Grand Prix - RIP 6.15.2005

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        • joejicker
          • Jun 2006
          • 3

          #5
          So it looks like I can't use the 2.8 oil pan. Will the 3100 oil pan fit ion my 89 z24?

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          • bszopi
            Site Coder
            • Apr 2000
            • 9185

            #6
            Originally posted by joejicker
            So it looks like I can't use the 2.8 oil pan. Will the 3100 oil pan fit ion my 89 z24?
            Fit on the engine? No. Fit inside of the engine bay? It should.
            -Brad-
            89 Mustang : Future 60V6 Power

            Follow the build -> http://www.3x00swap.com/index.php?page=mustang-blog

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            • treeZ24
              i wanna go fast!
              • Mar 2004
              • 251

              #7
              fyi you'll need a new front engine bracket to bolt to the front engine mount.
              got zap-straps?
              89 Z24
              13.886 @ 96.16 mph
              street trim - slicks

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