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  #1  
Old 06-25-2009, 07:53 PM
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Default Brake line temps for daily driving?

Just curious.

Anyone have any idea how hot the brakelines themselves get in normal stop-go day-to-day driving? I don't need precise answers, just curious if they get hot or not. I know brake fluid goes through a large range when being pushed hard on tracks etc. Is the same true for the lines carry the fluid?
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Old 06-26-2009, 01:36 AM
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Well, DOT4 boils at about 445 degrees, so that should be the absolute hottest the fluid would get near the calipers, maybe a few inches from the caliper in the soft line. The steel lines shouldn't get too hot, they are out in the open and probably dissipate and heat rather quickly.
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Old 06-26-2009, 02:10 AM
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I've never checked temps of the lines. I've seen the rotors on my car max out an infrared pyrometer at over 800° F. I've boiled ATE Super Blue, so that's 388° F if it was "wet", 536° if it was "dry". I think the outside surface if the lines stays pretty cool though.
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Old 06-26-2009, 02:17 AM
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Only input I can give is that I hit one with my arm once after a drive when I was checking something. It was hot, but not terribly hot. I have coated stainless lines and hi-temp fluid, but I don't think that would really make a difference.

Concerned that they could burn through the bags if they get too hot?
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Old 06-26-2009, 04:09 AM
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Quote:
Originally Posted by Drew View Post
Concerned that they could burn through the bags if they get too hot?
I have a weird mark on one of the bags. I only have like 200 miles on these bags and there is ZERO interference or rubbing (i've triple checked). I'm just trying to figure out where the mark came from (it may just be a manufacturing mark).

The only possible thing I could come up with is that the brake line swung up and hit the bag....but that seems highly unlikely.

It just led me to be curious...so I ask questions
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Old 06-26-2009, 04:36 AM
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Could it have been Stancemonk?
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Old 06-26-2009, 04:38 AM
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hahah he doesn't fit under the car anymore
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Old 06-26-2009, 10:03 AM
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hmmm. have you thought about replacing your brake lines with coated steal braided brake lines. I would think that that would help with heat transfer.
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Old 06-27-2009, 10:10 PM
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only thing I can come up with is if you have access to a lift, put the car on it, lower it, raise lift, and see what's near there. Maybe it's just the way the bag collapses onto itself making the mark?
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