Tried the YJ brake line mod... they dont fit - JeepForum.com
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post #1 of 15 Old 01-08-2019, 04:01 PM Thread Starter
173djeep
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Tried the YJ brake line mod... they dont fit

So I bought some YJ brake lines from autozone to replace my front brake lines after reading that this is a common mod to get some extended brake lines for cheap. When I went to mount them to the caliper they do not fit. It looks like I could grind down the flat surface on the line that mates up to the flat surface on the caliper but being that these are brake lines I didnt want to do anything that could cause the brakes to fail. Has anyone run into this? The part numbers are 70293 and 78121.

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post #2 of 15 Old 01-08-2019, 04:15 PM
biffgnar
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If you are talking about grinding off a little of the circle that the banjo bolt goes through grind away. If you look at the Vanco Big Brake kit install instructions on blackmagicbrakes.com you will see it described as a step there.
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post #3 of 15 Old 01-08-2019, 04:30 PM
Jerry Bransford
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Grinding is sometimes needed, I had to grind mine too. Here are my before & after photos.
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post #4 of 15 Old 01-08-2019, 05:14 PM Thread Starter
173djeep
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Grind away I will. Thanks for the help guys
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post #5 of 15 Old 01-08-2019, 08:04 PM
toximus
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Cover the hole while grinding. You don't want any bits mixing with the fluid!
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post #6 of 15 Old 01-08-2019, 08:37 PM
MrAndersonJeep
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I have a 97 TJ and did the mod and didn't have to grind. I haven't double checked the part numbers but I don't see an issue with grinding that little area. The first time out with them I did bend the metal tube section of the line though. I have since been to Moab and it hasn't done it again so I'm guessing it was a fluke. Seems like a legit swap!

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post #7 of 15 Old 01-08-2019, 10:31 PM
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My YJ brake lines also fit. The only change I made was to use thicker copper washers.

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post #8 of 15 Old 01-08-2019, 10:54 PM Thread Starter
173djeep
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Maybe it has something to do with these being autozone brand, I never really use their parts but the store down the street had them in stock so i gave them a shot.
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post #9 of 15 Old 01-09-2019, 05:02 AM
JEK3
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I tried to do this mod, but the YJ brake lines I got were the same length as the lines that came on my LJ.
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post #10 of 15 Old 01-09-2019, 09:11 AM
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Quote:
Originally Posted by jjvw View Post
My YJ brake lines also fit. The only change I made was to use thicker copper washers.

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Same ones I am using, IIRC the sides are even flat to fit.
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post #11 of 15 Old 01-09-2019, 09:38 AM
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Did you go with these due to a high lift or just because?

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post #12 of 15 Old 01-09-2019, 09:54 AM
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Quote:
Originally Posted by dbbd1 View Post
Did you go with these due to a high lift or just because?
It's needed with a 4" lift and disconnecting the sway bar.

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TheBoogieman is a jerk.
GOT IT BACK 6/17. 03' Rubicon/Zone 4.25" combo lift with 4" lift coils up front/Zone hydro shocks/5.13 gears/35" Mickey Thompson MTZ P3 tires/Black Magic brakes. Jeep #17 & 19.
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post #13 of 15 Old 01-09-2019, 12:42 PM
jjvw
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I added longer brake lines when I noticed that a 22.5" long shock was getting close to pulling the stock hoses tight at full extension. This was going on at about 2" of spring lift.

Hang the axle from the shocks and turn the steering back and forth to see what is really happening.

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post #14 of 15 Old 01-09-2019, 01:01 PM
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^^^
Thanks to both of you.

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post #15 of 15 Old 01-09-2019, 01:25 PM Thread Starter
173djeep
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So the passenger side fit fine without any grinding necessary. I compared the driver and passenger side lines and noticed that the driver side was a little larger than the passenger side, so just a defect in the product I guess. A little grinding and it fit just fine.
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