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Thread: 1275 EN40 Crank

Discuss the Austin Healey Sprite and the MG Midget. Two different but similar cars sometimes referred to collectively as the Spridget.

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    1275 EN40 Crank

    I have a crank from a 67 Sprite stamped EN40. Car I got it in was a rust bucket with only 32K miles. Bought as part of estate lot and was told by a friend of the man who died that this engine had never been out of the car. Plan was to put that engine in my 69, but when I tore it down to check it out I found the #1 rod journel had been turned 10-20 thousands. Guess it had been out before - Although the engine showed no other signs of rebuild. Anyway, I used the crank from the 69 in rebuild.

    Question! - Is this crank of any use to anyone?? Do not want to toss it if it has value to someone.

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    Re: 1275 EN40 Crank

    IIRC EN40 was a decent crank, don't toss it. If you don't want it I would take it and do some more research. I only live a few miles from you, I am just outside Bellefonte, PA

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    Re: 1275 EN40 Crank

    Looks like .030" and .040" rod bearings are pretty common, so it doesn't sound like the crank is toast.

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    Yoda dklawson's Avatar
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    Re: 1275 EN40 Crank

    For the Mini Cooper -S, the EN40 crank was/is the one to have. They are supposed to have superior toughness. I assume the same would be true for the Spridget crank.
    Doug L.
    '64 Morris Mini Cooper-S 1275
    '67 Triumph GT6 Mk1

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    Re: 1275 EN40 Crank

    Yes. I understand that it is the one to have for the mini and Spridget. That was why I was going to use it. But I also saw that the hardening process (nitrate?) was lost when they were turned. That is why I asked this one still had value to anyone.
    John J. Taylor
    '69 Sprite
    '63 Morris Mini Traveller

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    Re: 1275 EN40 Crank

    I was most surprised that only one journal was turned. Especially on a engine with 32K miles that showed no sighs of ever having been cracked open.
    John J. Taylor
    '69 Sprite
    '63 Morris Mini Traveller

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