Hey guys! New to the forum, new to being a subi owner, and new to doing brake lines. The brake lines around the coupling in front of the right rear wheel well are rusted and I'm leaking fluid. I've read a few posts on this forum that talk about this issue and people tend to run new brake lines from underneath the rear seat to the calipers, or so I gather. What I am wondering is if it is safe, and legal to simply cut out the 6 inches or so of rusted brake line and splice in a new brake line section using 4 fittings and 2 unions on each line. In the picture, the red section is what I want to replace. I'm not talking compression fittings, I'm talking proper double flared unions and fittings.
I just need a temp solution for a couple of months until I can get it on a lift and fix everything that needs fixing in the rear end. So I am wondering if this is doable. I definitely do not plan on dropping the tank to get to the brake lines. If what I want to do isn't a viable option then I am wondering if anyone has a recommendation for a new, easier path back to the calipers.
Thanks for any help!
Meh, it might be possible...
But, the places where you marked to cut and flare are not very accessible, and are probably still fairly rusty. These 2 things will make it very hard to get a clean flare that will seal.
Going from there to under the seat is a no-brainer. It's about 4-6" more line on each side, and you'll have much better work space, light, and rust-free line to work with.
The other end is a pain, but still not hard. Yes, the factory lines go over the tank, but it's completely reasonable to run them around and up either side of the tank.
Grab a coil of NiCopp brake line, this is a cheap source, I've probably bought 3 of these in the last 6 months (I'm in the process of replacing every inch of steel line on my Ford E150 van). https://www.amazon.c...uct/B0788JTB45/
If you really want to make sure these things outlast the rest of the car, grab some stainless fittings. Here's a metric kit https://www.amazon.c.../dp/B01KNGVPCC/
I wouldn't bother trying to find a stainless union, if you put them under the seat, they won't be vulnerable to the elements. Plain parts-store items are fine there.
This flaring tool makes the double flares a breeze:
When you re-route the lines, make sure they mounted firmly, but rubber-isolated to prevent them from wearing a hole. A little rubber hose and some zip-ties work for that, or something like this: https://www.amazon.c.../dp/B003BZQ7EE/
Edited by Numbchux, 17 March 2018 - 08:45 AM.