240z (280 L28 engine) gearbox oil change - filler plug removal issue | The Z Club of Great Britain
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240z (280 L28 engine) gearbox oil change - filler plug removal issue

Discussion in 'S30 (240Z / 260Z / 280Z)' started by Graeme - CZ, Apr 28, 2019.

  1. Graeme - CZ

    Graeme - CZ
    Z Club Member

    Hi folks,

    After wasting at least half of today fighting to remove the filler plug on the gearbox (280z block), I'm wondering if anyone has had the same issue problem and succeeding where I failed? I've had heat on it and a pretty big wrench.

    I probably now need to order the 17mm square female socket, though am struggling to find one on ebay - lots of male ones which you use for the drain plug.

    Thanks in advance for any tips.

    Cheers, Graeme
  2. dav118118

    Z Club Member

    I’ve had that exact problem too. In the end I bought a small set of nut removal sockets which effectively cuts into the nut or bolt head. The square bung by this point was no where near square so felt it might work. Which it did. The bung was throw away afterwards but mike at mjp had some in stock. I think the previous owner tightened the bung far too much and over time had started to corrode hence the problem. Luke
    Paul_S and toopy like this.
  3. toopy

    Z Club Member

    Mine came loose after a short fight with a decent sized 17mm spanner, maybe i was just lucky, as it was the first time it had been out for about 15 years!

    I searched around for ages online for the square female socket, but as you have discovered, they don't appear to exist! :confused:
  4. Graeme - CZ

    Graeme - CZ
    Z Club Member

    Thankfully my bung is still relatively square, but can't get it off with a 17mm spanner and fear that having too much of a go at it will render it more round than square. Yep, can't find a square female socket either...grrr. Wish I had tried the filler bung before the drain (of which I have now sadly drained the gearbox - lesson learnt).
  5. Turn & Burn

    Turn & Burn
    Z Club Member

    17mm 8 point socket...

    Shouldn’t the drain have a 1/2” ish socket rather than a male? This also has a magnet on it.

    The male is on the filler plug?

    Attached Files:

  6. Graeme - CZ

    Graeme - CZ
    Z Club Member

    It's the filler plug (male) I am having the issue with. The drain plug came out just fine and was also easier to get a long pipe on the wrench.
  7. Graeme - CZ

    Graeme - CZ
    Z Club Member

    A 19mm socket will fit on it (the plug is square) but given the force that will need applied to get it off, it's likely a regular socket will shred the square end. Hence why I have been hunting for a square key socket.
  8. johnymd

    Z Club Member

    I have used a big set of steelsons in the past with success. All the ones I have done recently were with a 17mm open ended spanner with a tube over it for extra length.
  9. Graeme - CZ

    Graeme - CZ
    Z Club Member

    Fearing that it's been overtightened and not wanting to round the plug, I found this. £34.


    DATSUN 17mm Square Drain Plug Socket KTC Tool 凹 (For: NISSAN 240Z 240K R31 R32)
  10. toopy

    Z Club Member

    Nice find, expensive, but in your particular case, probably money well spent :)
  11. Rob Gaskin

    Rob Gaskin Treasurer Staff Member Moderator

    So is that a 'Club' tool now? EXTRA;)
    AliK likes this.
  12. SacCyclone

    Z Club Member

    Dam that's expensive and worse yet the delivery time...wow
  13. Pete

    Pete Well-Known Forum User

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