which brake fluid with ss lines
Pro
Joined: Dec 2009
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From: Columbia South Carolina
Team Owner
Joined: Jan 2007
Posts: 29,063
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From: cookeville tennessee
YES I would get all the old out of it if the car hasnt had it all chged befor and if it is not clear in color.... Robert
Pro
Joined: Oct 2009
Posts: 560
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From: Centennial Colorado
Upgraded lines? They just have a woven stainless outer shield instead of rubber over the inner tubing. Stronger yes, but no other difference.
Thread Starter
Drifting
Joined: Feb 2011
Posts: 1,826
Likes: 1
From: Plymouth Wisconsin
St. Jude Donor '11-'12
I would like a higher boiling temp. I might do a road race otherwise autox. how much will I need to flush it all. any brand recommendation? Ill be using dot 4
Team Owner
Joined: Jan 2007
Posts: 29,063
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From: cookeville tennessee
Ditto. DOT 3 should be used. Dot 4 can be mixed, but will still boil at DOT 3 Temps unless the old stuff is completely purged. Moving to DOT 5 may cause you more problems with all your seals unless the entire system is being swapped out.
Which ever one you go with purge the lines get all the old out of her... Robert
Upgraded lines? They just have a woven stainless outer shield instead of rubber over the inner tubing. Stronger yes, but no other difference.
Which ever one you go with purge the lines get all the old out of her... RobertUpgraded lines? They just have a woven stainless outer shield instead of rubber over the inner tubing. Stronger yes, but no other difference.
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Le Mans Master
Joined: Nov 2005
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From: Allentown PA & Elk Twp NJ HPDE Addict
Also, I'm pretty sure DOT 3 will eat the paint as well as DOT 4.
Motul 600 is what I use.
Pro
Joined: Oct 2009
Posts: 560
Likes: 3
From: Centennial Colorado
If you complete purge the system and replace with DOT 4 your dry boiling point will be approx. 446 degrees. Dot 3 dry boiling point is 401. Those temps are only valid if the system stays dry and the fluid is changed frequently.
Intermediate
Joined: May 2011
Posts: 30
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From: mn
if your system has been using DOT 3, stay with DOT 3, Motorcycles, racing, etc may use DOT 5, but if you have any residue, the fluids combine and turn to a waxy substance...
then you have to replace all components and lines...
I've seen people do solvent flushes, alcohol flushes, etc... it isn't worth the headaches, unless you are already replacing the entire system
then you have to replace all components and lines...
I've seen people do solvent flushes, alcohol flushes, etc... it isn't worth the headaches, unless you are already replacing the entire system
Safety Car
Joined: May 2007
Posts: 4,812
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From: Taylorsville North Carolina
ATE, Motul 600 and Castrol are about all the same price and around the same dry and wet boiling point. All are way more than you will ever need on the street. It took a little over a litre and a 1/2 to completely flush mine. That is the advantage to the ATE, it comes in blue and clear so you know when flush is complete. Update us on your results, especially with pedal feel.
Team Owner
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From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
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Thanks,Matt
Le Mans Master
Joined: Nov 2005
Posts: 5,403
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From: Allentown PA & Elk Twp NJ HPDE Addict
if your system has been using DOT 3, stay with DOT 3, Motorcycles, racing, etc may use DOT 5, but if you have any residue, the fluids combine and turn to a waxy substance...
then you have to replace all components and lines...
I've seen people do solvent flushes, alcohol flushes, etc... it isn't worth the headaches, unless you are already replacing the entire system
then you have to replace all components and lines...
I've seen people do solvent flushes, alcohol flushes, etc... it isn't worth the headaches, unless you are already replacing the entire system
Racer
Joined: Oct 2010
Posts: 302
Likes: 2
From: Baton Rouge LA
DOT 3, 4, 5.1 are all the same polyethylene glycol based fluids, and can all be mixed together, swapped, whatever. 3/4 are easy to get and cheap as dirt. I use 4 in my car. One should note that the higher the DOT number, the more hygroscopic the fluid is and the more regular it should be changed, fyi.
DOT 5 is silicone-based fluid and should not be used in any system that use anti-lock brakes, or have not been completely flushed of 3/4/5.1 fluids. Even then you run the risk of ruining seals.
Nifty boiling point chart from wikipedia.
DOT 3 205 °C (401 °F) 140 °C (284 °F)
DOT 4 230 °C (446 °F) 155 °C (311 °F)
DOT 5 260 °C (500 °F) 180 °C (356 °F)
DOT 5.1 270 °C (518 °F) 190 °C (374 °F)
DOT 5 is silicone-based fluid and should not be used in any system that use anti-lock brakes, or have not been completely flushed of 3/4/5.1 fluids. Even then you run the risk of ruining seals.
Nifty boiling point chart from wikipedia.
DOT 3 205 °C (401 °F) 140 °C (284 °F)
DOT 4 230 °C (446 °F) 155 °C (311 °F)
DOT 5 260 °C (500 °F) 180 °C (356 °F)
DOT 5.1 270 °C (518 °F) 190 °C (374 °F)
Last edited by _r2h; Feb 18, 2012 at 10:29 PM. Reason: include nifty boiling point chart
