KLM Performance brake lines
Lead Driver
Joined: Feb 2022
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More than likely he was thinking NEW lines. Age these lines by 20 years and things change. The braided lines 20 years from now will hold higher pressures due to the braiding staying strong and preventing the old rubber from flexing.
Senior User
Joined: Nov 2014
Posts: 1,777
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From: France
How long do the standard lines last? On my 6.0 I had to change them out after 12 years as they had started to delaminate - braking was ok, but the fluid couldn’t return and the brakes kept overheating.
it doesn’t seem to be a problem in Europe - my local garage had never heard of it before, and my mini lines are 18 years old, 180k miles and still all original.
it doesn’t seem to be a problem in Europe - my local garage had never heard of it before, and my mini lines are 18 years old, 180k miles and still all original.
Hotshot
Joined: Oct 2015
Posts: 19,725
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From: Wyoming
In my opinion, replacing the rubber brake lines is not very common. I had a '91 Ford Ranger that would have needed new metal brake lines soon due to internal rusting, but the rubber lines were OK. The vehicle started out in Hawaii and was later shipped to Colorado. It was poorly maintained by the original owner.
Lead Driver
Joined: Feb 2022
Posts: 7,984
Likes: 4,058
How long do the standard lines last? On my 6.0 I had to change them out after 12 years as they had started to delaminate - braking was ok, but the fluid couldn’t return and the brakes kept overheating.
it doesn’t seem to be a problem in Europe - my local garage had never heard of it before, and my mini lines are 18 years old, 180k miles and still all original.
it doesn’t seem to be a problem in Europe - my local garage had never heard of it before, and my mini lines are 18 years old, 180k miles and still all original.
Depends on the environment they are used in. Up in the salt belt, the chemicals used on roads can breakdown the rubber shell and cause it to crack and split, which then attacks the polyester fibers that create the barrier to hold in the pressure and eventually cause the hose to rupture. Improper care of the brake system such as never changing the brake fluid can cause the rubber inside the lines to deteriorate and create blockages as you mention.
Senior User
Joined: Nov 2014
Posts: 1,777
Likes: 1,590
From: France
Depends on the environment they are used in. Up in the salt belt, the chemicals used on roads can breakdown the rubber shell and cause it to crack and split, which then attacks the polyester fibers that create the barrier to hold in the pressure and eventually cause the hose to rupture. Improper care of the brake system such as never changing the brake fluid can cause the rubber inside the lines to deteriorate and create blockages as you mention.
In any case, good to know it’s rare.
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FTE Legend
Joined: Mar 2017
Posts: 31,969
Likes: 9,197
From: Western NY
It will be almost impossible to get an apples-to-apples comparison. When you replace a brake line you'll have to bleed the brakes. That right there makes a change to the system that affects pedal feel. You would also likely flush the brake fluid, and that also throws off the comparison. Nonetheless, if you saw a 2x performance change in braking, I would say that your brake fluid was really bad to start with or the engineer I talked to gave me bad information.
Yep, more line bleeding to do for sure...
As to pedal feel, don't think it was bad prior to the one front side going metal to metal from seized caliper pins...
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FTE Legend
Joined: Mar 2017
Posts: 31,969
Likes: 9,197
From: Western NY
Depends on the environment they are used in. Up in the salt belt, the chemicals used on roads can breakdown the rubber shell and cause it to crack and split, which then attacks the polyester fibers that create the barrier to hold in the pressure and eventually cause the hose to rupture. Improper care of the brake system such as never changing the brake fluid can cause the rubber inside the lines to deteriorate and create blockages as you mention.
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