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Rotora 6pot BBK Failure!!??

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Old Jul 23, 2009 | 03:49 PM
  #21  
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You guys are seriously putting way to much into the fluid thing. DOT5 is not compatible with DOT 3, 4 and 5.1 fluids since it is silicone based and not water soluble. DOT5 fluid will not actually damage anything, it just is not a very good fluid to use in street cars because of the issue with water absorbtion and the fact that its farily compressible and gives a spongy pedal feel.

As far as DOT3, 4 and 5.1, they are all completely safe to use and can be interchanged with no issue. YOu may even notice that on some fluids like Valvoline SynPower, the fluid is labelled as being DOT 3 and 4 compatible. To the OP, just verify what you actually have in your system since if you have something like Motul 5.1, you have nothing to worry about.

We have a lot of info on brake fluid that should help to clear up some of the confusion going on here:

http://www.stoptech.com/tech_info/wp...fluid_1a.shtml

Last edited by StopTechErik; Jul 23, 2009 at 03:54 PM.
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Old Jul 23, 2009 | 04:38 PM
  #22  
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Originally Posted by StopTechErik
You guys are seriously putting way to much into the fluid thing. DOT5 is not compatible with DOT 3, 4 and 5.1 fluids since it is silicone based and not water soluble. DOT5 fluid will not actually damage anything, it just is not a very good fluid to use in street cars because of the issue with water absorbtion and the fact that its farily compressible and gives a spongy pedal feel.

As far as DOT3, 4 and 5.1, they are all completely safe to use and can be interchanged with no issue. YOu may even notice that on some fluids like Valvoline SynPower, the fluid is labelled as being DOT 3 and 4 compatible. To the OP, just verify what you actually have in your system since if you have something like Motul 5.1, you have nothing to worry about.

We have a lot of info on brake fluid that should help to clear up some of the confusion going on here:

http://www.stoptech.com/tech_info/wp...fluid_1a.shtml

Your input is greatly appreciated, thanks for the help! To my knowledge, im running dot 5 synthetic! thats what was told to me by the service manager at nissan...
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Old Jul 23, 2009 | 04:53 PM
  #23  
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Originally Posted by StopTechErik
You guys are seriously putting way to much into the fluid thing. DOT5 is not compatible with DOT 3, 4 and 5.1 fluids since it is silicone based and not water soluble. DOT5 fluid will not actually damage anything, it just is not a very good fluid to use in street cars because of the issue with water absorbtion and the fact that its farily compressible and gives a spongy pedal feel.
Hmmmm- I've always heard these two issues,

* BMW owners manual issues the warning... "IMPORTANT: All brembo braking products use natural-rubber base seals, and therefore are INCOMPATIBLE with DOT-5 SILICONE-based brake fluids.

DOT-5 SILICONE-based fluids react with natural-rubber seals to swell them WHICH CAN CAUSE SEVERE PISTON RETRACTION PROBLEMS. There is no cure for problems caused by DOT- 5 use other than complete seals replacement - USE ONLY DOT-3/4 NON-SILICONE TYPE FLUIDS in your brembo components. "



AAA recommends this...

* Never use DOT 5 in an ABS system. "Silicone fluid compresses slightly under pressure, which can cause a slightly spongy brake pedal feel. Silicone fluid also attracts air more than glycol fluid does, which makes brake bleeding harder. It also tends to vaporize slightly just below its boiling point; and it will aerate from prolonged vibration. All of these factors mean that DOT 5 silicone fluid should never be used in an antilock brake system."



From what I understand, NO auto manufacturer recommends using DOT 5. That should be enough to steer anybody away from using DOT 5 on a regular street car.
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Old Jul 23, 2009 | 05:48 PM
  #24  
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Guess im screwed then... Mor money down the drain if i have to start replacing brake components. Not to mention the continued down time that im looking at!
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Old Aug 2, 2009 | 11:06 AM
  #25  
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Update: Iv had my car back for a few days now and the brake feel has been great! I had both front lines replaced and am still running dot 5 fluid. No issues to speek of! Thanks for the help and info provided on this forum.

Bruce
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Old Aug 2, 2009 | 11:27 AM
  #26  
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Originally Posted by URNZWAY
thats what was told to me by the service manager at nissan...

this is the end of the fluid discussion. you have what ever they had available at the shop when they did the flush.


now about that line rubbing against the wheel ? wtf happened there ? who ever installed your kit did it wrong and had could have killed you. i would kick some ***....
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