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  1. #1
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    XJ6 rear split pin castellatted nut question

    Rear drive shaft is held in place with a large castellated nut and a split pin to hold in place.
    Having torqued the castellated nut to 100 fl lbs as per Haynes manual, it turns out on both sides that the nut castellations partially obscures the hole in which the split pin should fit.

    On one side I ever-so-slightly undid the nut to expose the hole and fit the correct size split pin. This means ofcourse, it is no longer at 100 ft lbs.
    On the other side I fitted a skinnier split pin (2.3 compared to 3.2mm) whilst maintaining the correct torque. I don't like the asymmetry, and its now worrying me that the skinny split pin might be able to slip through the hole if the nut unwound itself a tad. If it were the other way round with the nut potentially unwinding making the exposed hole appear smaller rather than larger it wouldn't matter. I don't know if this is actually possible, but its nagging at me.

    So which way to proceed?
    Your suggestion and advise please gents.
    Last edited by KevinW; 29-09-20 at 05:40 PM.
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  2. #2
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    As far as I know it is a bit of a compromise,
    you could tighten slightly more to expose the holes or loosen a bit ?
    Can't remember which way I went when I done mine many years ago .
    Chris.

  3. #3
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    I would be more concerned about the split pin and would use the correct Jag one,
    thats just my honest opinion,
    Chris.

  4. #4
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    I would turn the nut slightly more and get the correct split pin in. If it helps I’ve always set these at 110 ft lbs. I’m sure way back, when I first researched the torque value a jag specialist told me between 100ft lbs and 120 ft lbs. so it’s stuck with me that it’s 110.

    I’ve stripped loads of axles, some have been finger tight, others Have snapped sockets or worn out impact guns they were so damn tight

    Factoring in a bit of torque wrench inaccuracy a couple ft lbs either way won’t really make a difference.

  5. #5
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    All Jaguar torque settings, for all suspension has a plus and minus tolerance of about 10% . I would go mid setting and then adjustment alignment of the hole. Definitely fit a larger split pin as you say it could pull though.

  6. #6
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    Quote Originally Posted by Chimeara View Post
    Factoring in a bit of torque wrench inaccuracy a couple ft lbs either way won’t really make a difference.
    I was just going to say that .. the difference is probably the difference between stopping on the first click or clicking it another couple of times; it's not like most of us are getting our torque wrenches recalibrated every couple of years or have fancy digital ones*, anyway.

    Nip it up, pop the right split pin in, never think about it again

    *OK, I do, and I much prefer my old clicky one! But needed a 'big boy' one for the timing chain on the MINI.
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  7. #7
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    Quote Originally Posted by aaronjb View Post
    I was just going to say that .. the difference is probably the difference between stopping on the first click or clicking it another couple of times; it's not like most of us are getting our torque wrenches recalibrated every couple of years or have fancy digital ones*, anyway.

    Nip it up, pop the right split pin in, never think about it again

    *OK, I do, and I much prefer my old clicky one! But needed a 'big boy' one for the timing chain on the MINI.
    The old clicks ones are not that bad unless they have been used as breaker bar !
    And for information the strap on ones were not the best .
    Chris

  8. #8
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    Are we still talking about the right nuts.

    With talk of big boys, and strap ons I think we might be going off on a tangent.

  9. #9
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    Quote Originally Posted by Chimeara View Post
    Are we still talking about the right nuts.

    With talk of big boys, and strap ons I think we might be going off on a tangent.
    Turn right for Brighton Village, people, its not far down the road from me
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