Originally Posted by John S 1961
how do I remake the bubble flare at the proprotioning valve so I can cut off and replace a seriously corodded fitting at the brake prop valve which is leaking badly?
With a double flaring
If there is enough slack on your line, you might get away with just cutting right below the existing flare, sliding the old fitting off, new fitting on, then re flaring the end and ending up with enough line to re attach. If not, you need to splice in an extension to reach.
Either way no need to buy a tool you'll probably just use once. Go to Autozone
and rent their double flaring tool
. Part# for SAE
version is 27015
. Part number for Metric
version is 27012
. The instructions are right on the box. The diameter of your line will determine which kit you need.
If you need a tube bender, they have two available for rent also.
You leave a $25 deposit and get it back when you return the tool. So basically it's free as long as you don't break it or loose parts.
I used their flaring tool recently to make perfect flared ends on my trans line. I had a leak and cut the bad section out and spliced in a new section.
Napa carries straight sections of brake line with fitting already attached for dirt cheap (less than $5.00). They also carry the fittings by themselves depending on which way you're doing it. You should not be spending more than $10 for this repair.
I used a small pipe cutter to cut the line like this one: