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Thread: 4080828 901/02 mag or al

  1. 02-06-2014, 04:20 PM #1
    Norm01
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    4080828 901/02 mag or al

    Based on the location of the serial number I believe this is a magnesium case. Can someone confirm from serial numbers list if it is or not. I need to repair a stripped transmission mounting stud and it seems time-serts are not recommended for mag.
    1968 911T R.O.W. / 68S engine.
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  2. 02-06-2014, 04:24 PM #2
    dporsche74
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    68S=Al... see if the bottom has fins = Al
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  3. 02-06-2014, 04:29 PM #3
    davep
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    What is the build #? All the info you need is in the build # thread anyway.
    If the serial faces the rear it is Al, if it faces the right, then it is Mg. Don't need to even know the serial.
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  4. 02-06-2014, 05:24 PM #4
    Norm01
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    Serial number faces the side, this led me to believe it was magnesium however I wanted to double check in case there were aluminum engines with side facing serials. I thought magnesium cases started in 69. Build # is 12633.
    1968 911T R.O.W. / 68S engine.
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  5. 02-06-2014, 06:02 PM #5
    davep
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    Yep Mag, too far above 12000 to be Al. It was the trans cases that changed in 1969, engines were in 1968.
    Already in my list I see. What is the pairing # on the top of the case (if you have the fan shroud off)?
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  6. 02-07-2014, 07:46 AM #6
    Christophe Penard
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    mag from 901/02 4080681 i mean (mag case start in "68.5" around 03/68)

    My 901/02 (4080734) is a magnesium case
    67S+924
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