• Click here if your Engine has:
    only 5 head studs/nuts visible

    only 5 head studs/nuts visible
    • Click here if your Engine has:
      temperature sender provision in head

      temperature sender provision in head
      • Click here if your Engine has:
        stamped, aluminum plate or engine size casting number on back of block

        stamped, aluminum plate

        casting number on back of block
        • Click here if plate or number is:
          850
          • 848cc
        • Click here if plate or number is:
          998
          • Click here if your Engine has:
            head casting number 12G206 or 12G295

            head casting number 12G206 or 12G295
            • 998cc Cooper
          • Click here if your Engine has:
            head casting number other than 12G206 or 12G295

            head casting number other than 12G206 or 12G295
            • 998cc non-Cooper
        • Click here if plate or number is:
          1000
          • 997cc Cooper
        • Click here if plate or number is:
          1100
          • 1098cc
        • Click here if plate or number is:
          1275
          • 1275cc non-Cooper S
      • Click here if your Engine has:
        no stamped, aluminum plate or engine size casting number on back of block

        no stamped, aluminum plate or engine size casting number on back of block
        • Click here if your Engine has:
          no tappet covers on back of block

          no tappet covers on back of block
          • 1275cc non-Cooper S
        • Click here if your Engine has:
          tappet covers on back of block

          tappet covers on back of block
          • Click here if your Engine has:
            engine mount provision on front plate

            engine mount provision on front plate
            • 1098cc
          • Click here if your Engine has:
            no engine mount provision on front plate, remove valve cover

            no engine mount provision on front plate, remove valve cover
            • Click here if your Engine has:
              head casting number 12G206 or 12G295

              head casting number 12G206 or 12G295
              • 998cc Cooper
            • Click here if your Engine has:
              head casting number other than 12G206 or 12G295

              head casting number other than 12G206 or 12G295
              • 998cc non-Cooper
    • Click here if your Engine has:
      no temperature sender provision in head, remove head and measure bore

      no temperature sender provision in head, remove head and measure bore
      • Click here if your Engine has:
        bore diameter of 2.478"
        • 848cc
      • Click here if your Engine has:
        bore diameter of 2.543"
        • 998cc non-Cooper
  • Click here if your Engine has:
    7 head studs/nuts visible or 6 head studs/nuts and one bolt visible

    7 head studs/nuts visible or 6 head studs/nuts and one bolt visible
    • Click here if your Engine has:
      head stamped 12G1805 behind thermostat housing

      head stamped 12G1805 behind thermostat housing
      • Click here if your Engine has:
        no tappet covers on back of block

        no tappet covers on back of block
        • 1300GT
      • Click here if your Engine has:
        tappet covers on back of block

        tappet covers on back of block
        • Click here if your Engine has:
          stamped, aluminum plate on back of block

          stamped, aluminum plate on back of block
          • Click here if plate or number is:
            970
            • 970cc Cooper S
          • Click here if plate or number is:
            1070
            • 1071cc Cooper S
          • Click here if plate or number is:
            1275
            • 1275cc Cooper S
        • Click here if your Engine has:
          no stamped, aluminum plate on back of block

          no stamped, aluminum plate or engine size casting number on back of block
          • Click here if your Engine has:
            block height higher/extra metal above lug on block

            block height higher/extra metal above lug on block
            • 1275cc Cooper S
          • Click here if your Engine has:
            block height not higher/no extra metal above lug on back of block/can't tell, remove head and measure stroke

            block height not higher/no extra metal above lug on block
            • Click here if your Engine has:
              stroke of 2.4375"
              • 970cc Cooper S
            • Click here if your Engine has:
              stroke of 2.687"
              • 1071cc Cooper S
    • Click here if your Engine has:
      head not stamped 12G1805 behind thermostat housing

      head not stamped 12G1805 behind thermostat housing
      • Click here if your Engine has:
        stamped, aluminum plate on back of block

        stamped, aluminum plate on back of block
        • Click here if plate or number is:
          970
          • 970cc Cooper S
        • Click here if plate or number is:
          1070
          • 1071cc Cooper S
        • Click here if plate or number is:
          1275
          • 1275cc Cooper S
      • Click here if your Engine has:
        no stamped, aluminum plate on back of block

        no stamped, aluminum plate or engine size casting number on back of block
        • Click here if your Engine has:
          block height higher/extra metal above lug on back of block

          block height higher/extra metal above lug on block
          • 1275cc Cooper S
        • Click here if your Engine has:
          block height not higher/no extra metal above lug on back of block/can't tell

          block height not higher/no extra metal above lug on block
          • Click here if your Engine has:
            bore diameter of 2.4375"
            • 970cc Cooper S
          • Click here if your Engine has:
            bore diameter of 2.687"
            • 1071cc Cooper S