Wales
by Joske Vermeule, September 1
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Jun 14th, 2026
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Joined: May 2016
Posts: 194 Likes: 5
L - Learner Plates On
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OP
L - Learner Plates On
Joined: May 2016
Posts: 194 Likes: 5 |
Morning all,
This may sound silly but does any one know what size spanner is needed for brake bleed nipples?
Thanks chaps......
Why is there only one monopolies commission??
Rob B.
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Joined: Aug 2013
Posts: 3,383 Likes: 14
Talk Morgan Addict
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Talk Morgan Addict
Joined: Aug 2013
Posts: 3,383 Likes: 14 |
Not a silly question at all, the larger ones were always 7/16AF and the smaller ones (like the rears on a mini) were 5/16AF.
Given changes in manufacture and perhaps more importantly the location of manufacturers they could well be Metric.
I use a ring or ring end of a combo whenever possible, soak in release oil the day before can save grief, they only need nipping up but some murder the things!
BR
Colin
BR Colin
Who used to be a Spanner Juggler
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Joined: Nov 2018
Posts: 6,672 Likes: 438
Talk Morgan Sage
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Talk Morgan Sage
Joined: Nov 2018
Posts: 6,672 Likes: 438 |
On my 1972, a 10mm spanner fits perfectly. I have a ' bleed nipple' spanner - almost a full ring but has a cut out to slot over a bleed pipe.
"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10
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Joined: Aug 2013
Posts: 3,383 Likes: 14
Talk Morgan Addict
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Talk Morgan Addict
Joined: Aug 2013
Posts: 3,383 Likes: 14 |
Update...,
If you like kit search eBay for item number 402312024394
BR Colin
Who used to be a Spanner Juggler
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Joined: Jul 2007
Posts: 27,817 Likes: 749
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 27,817 Likes: 749 |
Get a bleed nipple spanner it makes it easier.
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Apr 2008
Posts: 12,263 Likes: 320
Scruffy Oik Member of the Inner Circle
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Scruffy Oik Member of the Inner Circle
Joined: Apr 2008
Posts: 12,263 Likes: 320 |
Get a bleed nipple spanner it makes it easier. Somehow I've never got around to getting one of these. I use a ring spanner or socket to crack the bleed nipple loose but not open, then fit the bleed pipe and use an open-ender on the nipple during the bleeding process, then once the pipe is off I snug down with a ring - but as Colin points out, they don't need a big heave.
Tim H.
1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE
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Joined: May 2016
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L - Learner Plates On
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OP
L - Learner Plates On
Joined: May 2016
Posts: 194 Likes: 5 |
Thanks chaps your input is great as normal, I have a bleed nipple spanner on order. One last question on this: Should I be unlucky enough to break a nipple what would be the size of the replacement (I didn't know that so many sizes were out there) I have a 1997 +4. Thanks again for your help 
Last edited by BLUE+4; 23/07/20 06:09 PM.
Why is there only one monopolies commission??
Rob B.
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Joined: Apr 2014
Posts: 5,182 Likes: 2
Charter Member
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Charter Member
Joined: Apr 2014
Posts: 5,182 Likes: 2 |
On my 1972, a 10mm spanner fits perfectly. I have a ' bleed nipple' spanner - almost a full ring but has a cut out to slot over a bleed pipe. . Surprised at that normally find a 11mm nearer to a 7/16.
.+8 Now gone for a 1800 4/4. Duratec in bright yellow.
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Joined: Nov 2018
Posts: 6,672 Likes: 438
Talk Morgan Sage
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Talk Morgan Sage
Joined: Nov 2018
Posts: 6,672 Likes: 438 |
My rear bleed nipples are 3/8 Unf with a 10mm hex head. I have 4 pot Hispec on the front, not sure of the thread size but again the hex head is 10mm.
"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10
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Joined: Jul 2007
Posts: 28,904 Likes: 352
Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,904 Likes: 352 |
Update...,
If you like kit search eBay for item number 402312024394 That's rather tasty! 
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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