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SORN
by OldSkrote - 31/07/25 02:07 PM
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New
by Rex_tulips - 30/07/25 07:59 PM
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Forums34
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Aug 24th, 2023
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Joined: May 2016
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OP
L - Learner Plates On
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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
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Talk Morgan Addict
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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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Talk Morgan Sage
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Talk Morgan Sage
Joined: Nov 2018
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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.
1972 4/4 4 seater, 1981 MGB GT
1984 Harley Davidson Electra Glide, 1990 Kawasaki ZX10
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Joined: Aug 2013
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Talk Morgan Addict
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Talk Morgan Addict
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Update...,
If you like kit search eBay for item number 402312024394
BR Colin
Who used to be a Spanner Juggler
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Member of the Inner Circle
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Posts: 26,765 Likes: 427 |
Get a bleed nipple spanner it makes it easier.
JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger
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Scruffy Oik Member of the Inner Circle
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Scruffy Oik Member of the Inner Circle
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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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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
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Charter Member
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Charter Member
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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
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Talk Morgan Sage
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Talk Morgan Sage
Joined: Nov 2018
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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.
1972 4/4 4 seater, 1981 MGB GT
1984 Harley Davidson Electra Glide, 1990 Kawasaki ZX10
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Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
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Update...,
If you like kit search eBay for item number 402312024394 That's rather tasty! 
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'09 Gen2 MINI Cooper ragtop
'90 LR 90 SW
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