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post #1 of 8 Old 06-30-2011, 03:19 AM Thread Starter
chrisod
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zj brake pipes

I need to replace the brake pipe that runs along the underside of the zj to supply the rear brakes as it has a leak. The existing pipe is steel and has a coiled winding around it. I'm in the UK and can not find this part locally. My Haynes manual says not to use copper pipe. Anyone know the reason as I was going to buy a flaring tool and use copper which is commonly used here. If anyone is in the UK and has a solution I would be grateful. Also, does anyone know the fitting sizes ?
Cheers, Chris

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post #2 of 8 Old 06-30-2011, 04:26 AM
Technohead
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You will not find an off-the-shelf replacement. Copper is not strong enough to withstand the pressure. You need steel brake line. I prefer the type with polymer coating. You should be able to source from auto parts store in various lengths and then bend them to fit. Note that a single flare is not sufficient. You need a double flare. I just replaced all the brake lines on mine and they used 3/8" fittings.

Cheers!
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post #3 of 8 Old 06-30-2011, 06:45 AM
ratmonkey
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Copper line on a 1520psi hydraulic system? Got a death wish?

Didn't need to have the coil around it. That just hides any kinks from the factory bends. Lol

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #4 of 8 Old 06-30-2011, 07:33 AM Thread Starter
chrisod
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Steel it is !

Thanks for the response. I'll try to source some steel brake pipe and 3/8" fittings. Anyone know where to get them in the uk ? Ebay and Google not returning much.....
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post #5 of 8 Old 06-30-2011, 07:41 AM
muddyjgc
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Quote:
Originally Posted by ratmonkey View Post
Copper line on a 1520psi hydraulic system? Got a death wish?

Didn't need to have the coil around it. That just hides any kinks from the factory bends. Lol
The coiling is not there to hide the kinks and bends, its under the vehicle you can't see it. The coiling is there to protect the bake line (pipe) from any road debris that might get kicked up.
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post #6 of 8 Old 06-30-2011, 01:58 PM
leadfootny
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NAPA sells a coil of copper brake line. I used it since in upstate ny I would be redoing the steel lines every 2-3 years with all the salt. I've had the copper in for 2 years, approx 40K miles without a single problem. I would imagine as long as you are using copper alloys designed for brake line use, you would be fine. Either way, make sure to get a quality flare tool and bending tool. It will make your life so much easier.
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post #7 of 8 Old 06-30-2011, 10:10 PM
ratmonkey
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Copper can't be used as brake line here. You can get plated line though.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #8 of 8 Old 06-30-2011, 10:59 PM
jnicewan
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The copper line you would see for brake lines is or should be an alloy (zinc/nickle probably). It is DOT approved and totally legal for use anywhere. There are many OEM's using this kind of line. Pure copper line is a big no-no, illegal and dumb to use, plus its going to be hard to come up with fittings/adapters and getting flares to take and seal.
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