Steel Brake Lines - 1992 Roadmaster Sedan - line fittings

[lethal3pilot]

Hello All !
I had replaced My two front steel lines feeding the front hoses when I re-did My brakes. My car is a wisconsin car, & the fear of rust-through of the rest of the lines, is probable. I'd like to finish doing the steel lines under those circumstances. Need to do My rear brakes as well & planned on replacing the hydraulics as well - wheel cylinders, hose. Reading my factory shop manual, along with doing My front hose lines I've learned about the bubble flare lines on this car the rear lines going into the wheel cylinders off the brake hose, are standard flared lines - 3/16. I noticed the inlet on the rear hose is the bubble flare - I have to use & have 2 adapters to make a standard flare 1/4" line work. The local parts store does not have on hand the 1/4" bubble flare line lengths so my guess is i have to use standard 1/4" line with adapters. my intent, is to replace both the 3/16 & 1/4 lines from the proportioning valve, into the ABS control & the long 1/4 line going from the ABS control to the rear brake hose inlet - as i said - i already have adapters for that. Does anyone have a clue, as to if I will need adapters for the proportioning valve lines to the ABS control & the rear outlet line from the ABS control? I will double-check with the parts store with a more experienced person to be sure they cannot get 1/4 bubble flare line lengths. Thanks !
Rich.

 

[NFortin198]

Check this out, on making a bubble flair:

[ame="http://www.youtube.com/watch?v=KaO2jAWqVU0"]How to make a Bubble Flare[/ame]

 

[lethal3pilot]

I found 6mm bubble flare line sections & unions with 10x1.0 mm fittings - this is the size that the rear brake hose needs to couple together. this will make up the rear line going from the rear brake hose, into the abs control. What I really want to know - & thanks to the person who posted the You Tube video on flaring. If anyones replaced thier lines on thier cars What the fitting thread sizes are on the proportioning valve lines & what they are also going into the ABS control & also the 1/4" / 6mm line for the rear line "Out". My best guess is they are metric threaded.

 

[buickwagon]

I don't remember the exact sizes anymore, but when I replaced all the lines on my 92, all the outlets on the ABS motor were different sizes and threads. I guess so they couldn't be mixed up on assembly. I removed them, labelled them and took them all in to the auto parts store to match them up with new ones. Then check, check and double check as you install them on the new lines. If you get the lines mixed up, the ABS will be trying to unlock the wrong wheel in a slide. So a wheel with no traction would remain locked up while a wheel that is turning would have no brakes -- that would officially qualify as a Bad Thing.