Click here to return to the home page.
Image of a road.
Who's Online Now
3 registered members (jim109b, Dutch, Quicksilver), 91 guests, and 25 spiders.
Key: Admin, Global Mod, Mod
Top Posters(30 Days)
+8Rich 215
John V6 149
CooperMan 109
OZ 4/4 105
TBM 90
Newest Members
DalesPlusFour, Mark Adams, Ian12345Aero8, kiwi100, Steve_1970
8015 Registered Users
Newest Topics
Inauguration of the Morgan Brussel Belgium garage
by nestor59310. 26/06/22 10:07 PM
Sat nav glare
by M3W55. 26/06/22 08:37 PM
Are pressure washers worth it?
by Quicksilver. 26/06/22 06:58 PM
Plus4 Tonneau 1993
by Clive Fishing. 26/06/22 04:16 PM
I Had To Do It....
by Peter J. 26/06/22 12:38 PM
Vredestein t-trac 2 165/80r15
by Montegue. 26/06/22 08:06 AM
Wire Wheels - Chrome to Black Options?
by Montegue. 26/06/22 07:41 AM
Latest Photos
Isle of Man Trip June 2022
People of the Isle of Man Trip June 2022
Orkney
New Plus Four config...
MOG414 on MaltaTV part 1 &  2
Forum Statistics
Forums34
Topics43,535
Posts732,585
Members8,015
Most Online1,033
Dec 28th, 2019
Today's Birthdays
Garywc
Previous Thread
Next Thread
Print Thread
Page 1 of 3 1 2 3
Crush washers question #742068
17/05/22 12:37 AM
17/05/22 12:37 AM
Joined: Apr 2021
Posts: 138
San Francisco
R
RobFog Offline OP
L - Learner Plates On
RobFog  Offline OP
L - Learner Plates On
R

Joined: Apr 2021
Posts: 138
San Francisco
As some of you know, I'm in the process of breaking my car from the brake shoes in - I've now reached the point where I have to replace the "T" / 3 way union between the rear brake lines . In the previous connection I had a copper washer between the main line and the 'T' and this fit well. However, with the new 'T' this copper washer isn't thick enough to close the gap between the union and the brake pipe and I'm getting brake fluid leaking. I'm wondering if it's safe or wise to put two copper washers into this space (I'm guessing not) or whether I should search for a thicker copper washer - there is a "thick" copper washer listed on Moss Motors but I have no idea is this will be 'thick" enough - queue the jokes here.

Are crush washers still the way to go and does anyone have an recommendations as to a good source (I bought a box of assorted copper washers on line and these were all too thin)


1974 4/4 2 seater
Re: Crush washers question [Re: RobFog] #742073
17/05/22 03:21 AM
17/05/22 03:21 AM
Joined: Jun 2019
Posts: 367
Bridgeport
PaulyG Offline
Learner Plates Off!
PaulyG  Offline
Learner Plates Off!

Joined: Jun 2019
Posts: 367
Bridgeport
I think it makes sense to try 2 washers. All it can is fix it, or leak. Then you'll have your answer.


1973 4/4 2 place
Re: Crush washers question [Re: RobFog] #742076
17/05/22 06:23 AM
17/05/22 06:23 AM
Joined: Apr 2008
Posts: 10,706
Gloucestershire, UK
Hamwich Offline
Scruffy Oik
Hamwich  Offline
Scruffy Oik
Member of the Inner Circle

Joined: Apr 2008
Posts: 10,706
Gloucestershire, UK
Copper washers are not really what I would consider to be crush washers as in this application they don't have specified torque or measured thickness changes.

If your copper washer really isn't thick enough to do the job (you are annealing it properly before fitting it, aren't you) then I would say a thick washer has got to be better than 2 thin ones, always assuming you don't materially reduce the thread contact.

But having said that, I'd do a detailed comparison of old vs new union, checking thread depth and especially the mating surface where the copper washer sits. Is it properly smooth? Could there be a bit of casting flash or something preventing proper seating of the washer? A freshly annealed copper washer is a vey soft thing indeed, but there's a limit to its ability to conform to irregular surfaces.


Tim H.
1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE
Re: Crush washers question [Re: RobFog] #742080
17/05/22 06:43 AM
17/05/22 06:43 AM
Joined: Jul 2019
Posts: 2,500
L
Luddite Offline
Talk Morgan Expert
Luddite  Offline
Talk Morgan Expert
L

Joined: Jul 2019
Posts: 2,500
Copper washers on the axle brake line "T" ...That`s a new one on me. I am struggling to remember if I have used copper to seal brake line fittings at any time in the fifty or so years I have been messing with cars... But then my memory is not at it`s best and every day is a school day..

Re: Crush washers question [Re: RobFog] #742081
17/05/22 06:49 AM
17/05/22 06:49 AM
Joined: Nov 2018
Posts: 4,382
Northants, UK
TBM Offline
Part of the Furniture
TBM  Offline
Part of the Furniture

Joined: Nov 2018
Posts: 4,382
Northants, UK
The only time I've used copper washers on brake lines is on banjo bolts.

Does sound like a thread issue on the fittings.


1972 4/4 4 seater - 3G Morganeer
Too many ratty motorbikes
Re: Crush washers question [Re: RobFog] #742083
17/05/22 06:56 AM
17/05/22 06:56 AM
Joined: Jul 2019
Posts: 2,500
L
Luddite Offline
Talk Morgan Expert
Luddite  Offline
Talk Morgan Expert
L

Joined: Jul 2019
Posts: 2,500
TBM, when I typed my response I had a picture of a banjo bolt set-up in my head though thought it was just fuel lines...Hmm..? Perhaps the master cylinder connection on my first car the 59 Frogeye Sprite, but that was a really long time ago. No doubt someone will put me right..

Re: Crush washers question [Re: RobFog] #742084
17/05/22 06:59 AM
17/05/22 06:59 AM
Joined: Feb 2016
Posts: 4,902
East Harling, Norfolk UK
RichardV6 Offline
Part of the Furniture
RichardV6  Offline
Part of the Furniture

Joined: Feb 2016
Posts: 4,902
East Harling, Norfolk UK
Might be tempted by Dowty washers Rob. Usually of relatively thick steel (which will help in your case) with proud ring of nitrile rubber bonded to the inner surface. They are ideally suited to high pressure hydraulics, with the seal improving with internal pressure.

[Linked Image]

They may come under a different name in the US.


Richard

2018 Roadster - Red/Magnolia - "Morton"
1966 Land Rover series 2a SWB
1945 Moto Guzzi Airone
Re: Crush washers question [Re: RobFog] #742086
17/05/22 07:09 AM
17/05/22 07:09 AM
Joined: Nov 2018
Posts: 4,382
Northants, UK
TBM Offline
Part of the Furniture
TBM  Offline
Part of the Furniture

Joined: Nov 2018
Posts: 4,382
Northants, UK
I may be wrong but I don't think Dowty washers are compatible with Brake fluid?


1972 4/4 4 seater - 3G Morganeer
Too many ratty motorbikes
Re: Crush washers question [Re: RobFog] #742087
17/05/22 07:15 AM
17/05/22 07:15 AM
Joined: Jul 2019
Posts: 2,500
L
Luddite Offline
Talk Morgan Expert
Luddite  Offline
Talk Morgan Expert
L

Joined: Jul 2019
Posts: 2,500
As we are typing of brake lines, I really need someone to tell me that the "T" in question requires any kind of washer to seal the connections.

Whereas my thinking would be that the either the "T" or the pipe flair are not mating correctly and thus leaking. Any attempt to seal with washers might indeed work but surely would be regarded as non standard and a risky bodge, perhaps more so if the connection has been over tightened or the threads in both items in the connection are of a mis-match..?

Re: Crush washers question [Re: RobFog] #742088
17/05/22 07:16 AM
17/05/22 07:16 AM
Joined: Nov 2018
Posts: 4,382
Northants, UK
TBM Offline
Part of the Furniture
TBM  Offline
Part of the Furniture

Joined: Nov 2018
Posts: 4,382
Northants, UK
Depending on the size of the leak, you could try some Brake Line thread sealant? Sealey do one, and Loctite.

I would only consider if it was a very small weep.


1972 4/4 4 seater - 3G Morganeer
Too many ratty motorbikes
Page 1 of 3 1 2 3

Moderated by  TalkMorgan 

Powered by UBB.threads™ PHP Forum Software 7.7.1