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04-17-2024, 06:21 PM
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#1 |
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Senior Member
Join Date: Sep 2018
Location: Mora Minn
Posts: 167
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master cylinder
I just put a new master cylinder on my car. I have one fitting that weeps. is it safe to put a sealer on the threads. Thanks
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04-17-2024, 06:30 PM
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#2 |
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Senior Member
Join Date: Jan 2011
Posts: 342
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Re: master cylinder
The threads don't seal on brake lines--the double flare on the end of the tube seals against the female fitting. It might seal if you tighten a little, or there might be a small piece of dirt on the flare, or the flare itself might have a burr or imperfection. Trying tightening first.
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04-17-2024, 06:36 PM
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#3 |
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Senior Member
Join Date: Sep 2018
Location: Mora Minn
Posts: 167
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Re: master cylinder
I've tightened about as tight as I can get it. I do understand what your saying.
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04-17-2024, 08:31 PM
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#4 |
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Senior Member
Join Date: May 2010
Posts: 4,494
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Re: master cylinder
Are sure your fitting is contacting the flare inside the MC?
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04-17-2024, 08:33 PM
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#5 |
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Senior Member
Join Date: Jan 2014
Location: Orcas Island Washington
Posts: 4,962
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Re: master cylinder
I'm afraid you are going to have to take it apart and get to the bottom of the problem. Without the dual master we need to be extra careful. I tend to use the tubes they stock at napa as I have flared a few leakers with my inexpensive kit.
__________________
Owner/Operator of 'Jailbar Ranch' on the side of Mt. Pickett. Current stable consists of 1946 1/2 ton pickup turned woodie wagon with FH V8, 1947 Tonner Pickup (red) mostly stock with exception of a cummins 6at turbo diesel, 1946 Tonner Pickup (green) with 226 cu in 6 cyl flathead, 1979 Toyota landcruiser wagon, completely encased in 1947 Ford Jailbar sheet metal. Ok, cornbinder rear fenders..... 'Rusty ol' floorboards, hot on their feet' (Alan Jackson) |
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04-17-2024, 10:11 PM
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#6 |
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Senior Member
Join Date: Oct 2011
Location: elmira,ny
Posts: 1,518
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Re: master cylinder
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04-18-2024, 06:39 AM
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#7 |
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Senior Member
Join Date: Sep 2018
Location: Mora Minn
Posts: 167
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Re: master cylinder
It is a duel cylinder that I have taken out once already. I'm going to take it out again today and check the flare. I have a feeling it's a bad flare. Thanks for the info I appreciate it.
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04-18-2024, 08:04 AM
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#8 |
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Senior Member
Join Date: Jun 2010
Location: Perry OH
Posts: 1,330
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Re: master cylinder
Are you using double flares ?
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04-19-2024, 05:44 AM
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#9 |
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Senior Member
Join Date: Jul 2016
Location: Lake worth Florida
Posts: 1,105
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Re: master cylinder
Some Dual master cyls need an adapter .
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04-19-2024, 06:18 AM
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#10 | |
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Senior Member
Join Date: Sep 2014
Location: Wiscasset, Maine
Posts: 1,987
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Re: master cylinder
Quote:
Yes, not all master cylinders have “Inverted Flare Female” IFF machining. Some use 1/2"-20 and/or 7/16"-24 straight threading. These connections use a copper sealing washer between the master cylinder and the fitting. This fitting will then accept IFM - meaning “Inverted Flare Male”. Glenn
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Archives of historical but relevant older articles: ------------- Hover mouse over the links below and click! ~~~~~~~~~~~~~~~~~--------------- Rumble Seat's Notes Techno-Source for the 1932 thru 1953 Flathead Ford |
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04-19-2024, 08:52 AM
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#11 |
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Senior Member
Join Date: Sep 2018
Location: Mora Minn
Posts: 167
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Re: master cylinder
Thanks for all the help. I used a different line and flare and it stopped the leak.
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