Thread sealer on brake lines? - Focus Fanatics
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace

Go Back   Focus Fanatics > Ford Focus Tech Discussions > Wheels & Tires - Sponsored By Tire Rack

Wheels & Tires - Sponsored By Tire Rack The place to go for answers on wheel types, tire sizes, offset, wheel patterns and more.
Sponsored By:
Tire Rack

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Thread Tools Display Modes
Old 11-30-2012, 07:57 PM   #1
Focus Rookie
Join Date: Nov 2012
Fan#: 106844
Location: Peterborough, Canada
What I Drive: 2001 White SE

Posts: 1
FF Reputation: 1 FrozenNorthman Good Standing Member
Buy-Sell-Trade Rating: (0)
Thread sealer on brake lines?

Hey guys, this is my first time posting, this is quite the site you have here! I just replaced the brakes lines from the booster(is that right booster? not the master cylinder, but the secondary unit mounted on the drivers side, right near the firewall) to the calipers, including a new flex hose. when I pump the brakes, all I get is a gurgling sound, and fluid leaking from where the line meets the flex hose. my question is, should I be sealing this somehow, or will the fluid just eat the sealant? are there any other possible causes Ive overlooked?

FrozenNorthman is offline  
    Reply With Quote
Sponsored Links
Old 11-30-2012, 10:15 PM   #2
Focus Fanatic
elsolo's Avatar
Join Date: Mar 2012
Fan#: 96835
Location: Long Beach, CA
What I Drive: 2003 dark shadow grey metallic ZX3

Posts: 2,172
FF Reputation: 17 elsolo Great Standing Member
Buy-Sell-Trade Rating: (1)
There is no place on a brake system where it is appropriate to use any kind of sealer.

I couldn't make sense of your post, but:

Brake boosters have no hydraulic lines, just a vacuum hose. The booster is mounted between the firewall and the master cylinder.

ABS units have hydraulic brake lines coming in/out of them.
elsolo is offline  
    Reply With Quote
Old 12-01-2012, 12:01 AM   #3
mikebontoft's Avatar
Join Date: Aug 2008
Fan#: 58647
Location: SLC, UT
What I Drive: 5.9L Grand Cherokee ZJ

Posts: 26,025
FF Reputation: 76 mikebontoft Excellent Standing Member
Buy-Sell-Trade Rating: (3)
wait so did you replace the thing on top of the big black round thing or the plastic container right next to the fuse box?
SR #127 | '02 Focus SE "Foci" (5.0 RWD - parting) | '90 Mazda 626 GT "Greenie" (2.2L turbo T3/T4 rebuild-sold) | '75 BMW 2002 "Carby" (resto-mod racecar) | '75 BMW 2002 (donor -sold) | '98 Jeep Grand Cherokee 5.9L (lifted and fast) | '99 BMW 328is (alt. daily).
Moderating General Chat Lounge, General Technical Chat, Ford Focus & General Car Chat, and Rocky Mountain Fanatics
mikebontoft is online now  
    Reply With Quote
Old 12-01-2012, 07:18 AM   #4
I used to drive this
macdiesel's Avatar
Join Date: Jan 2006
Fan#: 31579
Location: Chicago, IL
What I Drive: 2010 mazdaspeed3

Posts: 3,310
FF Reputation: 21 macdiesel Great Standing Member
Buy-Sell-Trade Rating: (16)
no sealant. either something isnt tightened all the way or its broken. Post up a pic, night be helpful.
I now drive a Japanese Ford.
macdiesel is offline  
    Reply With Quote
Old 12-01-2012, 01:36 PM   #5
sailor's Avatar
Join Date: Jun 2008
Fan#: 57268
Location: Williamsville, NY
What I Drive: 2004 Pitch Black ZTS 2.3 5spd.

Posts: 13,351
FF Reputation: 67 sailor Excellent Standing Member
Buy-Sell-Trade Rating: (0)
Major leakage when installing new brake lines is unfortunately all too common.

The seal comes from the metal of the brake line being "crushed" into the receptacle it attaches to, and it's critical that these pieces match & line up properly before final tightening.

The first common issue come from a mis-match of components. there are TWO types of flares for the end of the brake line in common use, and they do NOT interchange. The receptacle at the end of the flex line HAS to match the type of flare at the end of the steel line for it to seal.

If you look inside the union at the end of the flex line and see a "cone" shaped center, your steel line needs a recessed flare to match. If the flex union has a recessed center, your steel line needs a "ball" flare that protrudes to mate with it.

The second issue can come from trying to "force" the fittings together. When the steel line is bent to fit, it needs a straight end section that fits fully into the union B4 screwing in the compression nut. If this area is bent or angled into the fitting it can be pressed in off center by the nut and will NOT seat properly, leading to a leak that further tightening will not fix.

Making this situation even MORE fun, is the fact that sometimes a steel line will need different flares/nuts on each end to match the unions it attaches to. MOST generic steel lines have the same fittings on each end, so it's easy to end up with the wrong "match" at one of the ends if you don't know about this common pitfall.

Take another look, and see if one of these scenarios matches your problem.

sailor is offline  
    Reply With Quote

Bookmarks & Social Networks
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 01:09 PM.

Copyright 2002-2014 All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.