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  #1  
Old 08-11-2014, 11:23 AM
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As the title states, I've got a brake line leak. I've chased it down to the general area, basically a line somewhere between the two rear wheels judging by the amount of brake fluid sprayed everywhere there (not leaking from the calipers). However, I haven't yet located the exact location of the leak.
My question is, having never done this before, is this repair something I should attempt to do myself, or should I just have a shop do it? (Weighing the factors of cost vs tediousness)

Obviously the lines will also need to be bled after repairing them, can I do this myself or does the abs system need special tools?

96 ZJ Laredo 4.0

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  #2  
Old 08-11-2014, 01:13 PM
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Re: leaking brake line

A flare nut wrench should handle changing the damaged line. Then, bleed as usual, paying close attention to the level in the reservoir, as the new line will take some fluid.


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Old 08-12-2014, 07:13 PM
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Thanks for the tips! Still trying to find exactly where it's coming from. It's a bit tricky since everything in the general area is already covered in brake fluid and there are no obvious drips, even with someone pressing the pedal.
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Old 08-13-2014, 05:28 AM
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Re: leaking brake line

How do the brake hoses look? Can be that they are dried out and only leaking when the rear comes up a bit when dynamically braking.
If you would need to change a line, i think you will need a flaring tool to make the end couplings. But since there is no leak visible while braking when standing still, i would think that the problem is ride height related.
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  #5  
Old 08-13-2014, 10:46 AM
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Yeah, probably the rear hose coming off the axle. The connection ends are all rusty and the rubber looks pretty old. Still can't find the leak, but the metal lines all look fine. I'll try replacing that hose first since it seems like the weakest link in the equation.
The funniest part about this is that the moment I start looking for a TJ to buy, the old ZJ starts having issues. I think it's protesting!
Thanks Frango!

Edit- it occurs to me that this may have happened a few weeks ago when I had to tear off my muffler and tailpipe on the side of the highway after the pipe broke between the muffler and the cat. I had no proper tools with me, so basically had to bend the pipe back and forth until it broke to remove it. I probably hit the brake hose by accident.
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Old 08-13-2014, 06:24 PM
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Re: leaking brake line

Quote:
Originally Posted by sanjuro77 View Post
Yeah, probably the rear hose coming off the axle. The connection ends are all rusty and the rubber looks pretty old. Still can't find the leak, but the metal lines all look fine. I'll try replacing that hose first since it seems like the weakest link in the equation.
The funniest part about this is that the moment I start looking for a TJ to buy, the old ZJ starts having issues. I think it's protesting!
Thanks Frango!

Edit- it occurs to me that this may have happened a few weeks ago when I had to tear off my muffler and tailpipe on the side of the highway after the pipe broke between the muffler and the cat. I had no proper tools with me, so basically had to bend the pipe back and forth until it broke to remove it. I probably hit the brake hose by accident.
That area where you had to perform surgery would be a good place to look, as would any possibilities it hit something as it broke.

If you get nowhere, try getting under there with a good oil remover detergent and clean the entire area so you can hopefully see NEW bits...

If still no joy, add a bit of UV automotive dye to the fluid.
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Old 08-14-2014, 09:51 AM
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I'm thinking there is no more fresh drip because the line is likely full of air at this point, guessing by the amount of pedal drop and the fact that the brake lights stay on until I physically lift up the pedal

I'm gonna spend a few hours today investigating thoroughly, and will report back. Time to get dirty!
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Old 08-14-2014, 05:00 PM
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Well, got it all done.
Turns out the drivers side rear brake hose had a pinhole leak that was spritzing a nearly atomized fine mist of brake fluid all over the place.
After replacing the hose and a bleed, my brakes are working better than before the leak started!

Thanks for the pointers, y'all!
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Old 08-14-2014, 05:19 PM
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Re: leaking brake line




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