Master Cylinder brake lines

CANDO1

MEMBER
2008 CADILLAC STS
3.6L
6 CYL
4WD
AUTOMATIC
140,000 MILES

Are the lines that go from the Master cylinder to the ABS a 1/4" in size?
. Also Do I have to use a Bubble flare or can I use the double flare.

I replaced the 3/16 line in the rear that goes over the rear differential. The two that go to the rear from the ABS you can see in the middle are fine the ones that go to the two front wheels are rusty the driver wheel line is leaking also. So I am replacing them both. The Master cylinder lines are also rusty and I want to replace them as well. I just need to be sure they are 11/4 inch lines.
Thanks
if you have any diagrams I would appreciate them
or any suggestions

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1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

Sorry for the delay with this. There was an issue with the post that it would only show up as an error, so we were not able to respond. Our IT team was able to figure out what was going on and correct it and so now we can respond.

As for your first question, the lines from the master to the ABS are almost always 1/4 inch however, they don't list this in the manual to know for sure.

I would suggest just using a micrometer and measure the line that you are replacing as these measurements are the outside diameter of the line.

As for the flare, you can use a double flare as this is the most common. In fact, here is a video that will show how to do it if you need it:

https://www.youtube.com/watch?v=sO43p4ZFUiM

Please let us know what other info you need or how you made out if you have already completed this. Sorry again for the delay.