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Brake lines leaking

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Old Oct 25, 2021 | 05:52 PM
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Default Brake lines leaking

I have a 2000 LS400 that has recently lost brake fluid due to leak in brake line. Does any know what size brake line is needed and fittings?
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Old Oct 25, 2021 | 06:06 PM
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3/16" nickel/copper also known as nicopp use the original fittings I've found aftermarket are quite poorly made. Unless the fittings have completely rotted out. The threaded ends are M10x.1.0mm.
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Old Oct 25, 2021 | 07:22 PM
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Thanks. Where are connections located, are they near the front and back wheel? How much brake line will it need?
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Old Oct 25, 2021 | 08:51 PM
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Originally Posted by RDRSR
I have a 2000 LS400 that has recently lost brake fluid due to leak in brake line. Does any know what size brake line is needed and fittings?
Are you able to post images of the brake line failure?
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Old Oct 26, 2021 | 09:22 AM
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there are many brake lines across the car; hard line and soft line.
lex2k mentioned the hard lines which can be custom made (cut and flared to your desired length). soft lines are another story as you need a special crimping tool to terminate them.

so it really depends on what line you're looking for. please let us know what or where the line is. anything near the brake caliper itself will likely be a soft line.

in the end the fastest way to remedy the problem is to buy an exact replacement line, either used or new.
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Old Oct 26, 2021 | 11:10 AM
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Originally Posted by timmy0tool
there are many brake lines across the car; hard line and soft line.
lex2k mentioned the hard lines which can be custom made (cut and flared to your desired length). soft lines are another story as you need a special crimping tool to terminate them.

so it really depends on what line you're looking for. please let us know what or where the line is. anything near the brake caliper itself will likely be a soft line.

in the end the fastest way to remedy the problem is to buy an exact replacement line, either used or new.
I had the same problem about a month ago. Ya need to take a good look at all the lines cuz once one line rots through, the rest are doomed in the near future.

What happened to me was; I had one back line that rotted and leaked, had it repaired and when they bled the brakes, another spot on the same line popped through the rust. At that point I was looking for a way to just shut off the back brakes, temporarily. (Didn't happen) So I had them make up another whole line. Started bleeding it again and a front line busted through some more rust also. I could have driven without back brakes but.....not the front. Cuz of other problems, this was the last straw for my LS400. Now it just sits.
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Old Oct 26, 2021 | 01:22 PM
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Default Brake Fluid Service Is A Maintenance Item

Toyota discontinued most if not all hard lines.

Helped a friend replace all hard lines on his 1993...no fun.

On 1999 LS400, the original lines employ greenish anti- corrosion coating and appear to use a heat shrink wrap in certain areas.

One big issue is line rot from inside out caused by old brake fluid saturated with water absorbed from atmosphere...

Brake fluid must be purged and replaced every two to three years..

In any event, if brake line breach in one area, then reasonable that others are not far behind..
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Old Oct 26, 2021 | 03:32 PM
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Originally Posted by deanshark
I had the same problem about a month ago. Ya need to take a good look at all the lines cuz once one line rots through, the rest are doomed in the near future.

What happened to me was; I had one back line that rotted and leaked, had it repaired and when they bled the brakes, another spot on the same line popped through the rust. At that point I was looking for a way to just shut off the back brakes, temporarily. (Didn't happen) So I had them make up another whole line. Started bleeding it again and a front line busted through some more rust also. I could have driven without back brakes but.....not the front. Cuz of other problems, this was the last straw for my LS400. Now it just sits.
good input here!
sad though that your car kept leaking and is now not drivable !
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Old Oct 29, 2021 | 12:55 PM
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Good opportunity to upgrade to stainless steel lines, and improve braking while you’re at it.
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Old Nov 1, 2021 | 09:13 AM
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Originally Posted by Lex212
Good opportunity to upgrade to stainless steel lines, and improve braking while you’re at it.
that's only if the rubber softlines are bad. if the hardlines that run the length of the underside of the car are the ones that are leaking, stainless steel lines won't remedy it.
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