ok so about a week ago a friend and i installed a new clutch mc on a 93. yesterday we checked the fluid bc we thought about it and it looked as though it was about empty so we went to the parts store to get some more. we get there and get the same kinda fluid as before, dot 5 silicon purple stuff. we go to put it in the car and he tries to put it in but its going in really slowly. i get a toothpick to mess with the floater thing that sits in the top of the reservoir and noticed that it is completely full but we couldnt tell bc the fluid was clear. i guess it was the old fluid that was still in the brake lines, or booster. is that right?



also is it a problem for these fluids to mix? the brakes and clutch are working fine now, but will it become a problem?

read on the bottle. i know you can normally mix them but it depends on the brand

isn't dot 5 what they run in race cars only? I heard it's bad to run it because of the high silicone mixture in the dot 5. I wouldn't see any issues with using it mixed with other stuff at all though..

i dont think there will be a prob either, but i dont know how chemicals react to others so i thought id ask.



do you guys think it would be beneficial to drain the whole sys, brakes and clutch, and replace with all dot 5?

[quote name='nopistons94' date='May 26 2005, 12:06 PM']isn't dot 5 what they run in race cars only? I heard it's bad to run it because of the high silicone mixture in the dot 5. I wouldn't see any issues with using it mixed with other stuff at all though..


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its what steve kan said to use.

[quote name='Shane.Trammell' date='May 26 2005, 02:20 PM']i dont think there will be a prob either, but i dont know how chemicals react to others so i thought id ask.



do you guys think it would be beneficial to drain the whole sys, brakes and clutch, and replace with all dot 5?


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Again, I don't think your supposed to run DOT-5 In street cars....

[quote name='nopistons94' date='May 26 2005, 12:21 PM']Again, I don't think your supposed to run DOT-5 In street cars....


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[quote name='Shane.Trammell' date='May 26 2005, 12:21 PM']its what steve kan said to use.


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[quote name='Shane.Trammell' date='May 26 2005, 02:21 PM']its what steve kan said to use.


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Was his car driven on the street as much as your going to be driving?

[quote name='website' date='May 26 2005, 02:22 PM']DOT 5 is silicone based fluid*. NOT compatible with DOT 3 or DOT 4.



More info about DOT 5 fluid:



There are certain mods that are really "trick", but require so much work or cost so much that almost no one will do what it takes to exploit it properly. DOT 5 fluid is one of them.



DOT 5 fluid is silicone based*, rather than glycol based like DOT 3 & 4. Being silicone based, DOT 5 fluid won't absorb moisture, while DOT 3 & 4 does. What this means is that you have to completely clean out your brake system of any traces of the previous fluid as well as any moisture, otherwise you risk causing corrosion in the system. Brakes will continue to absorb moisture near all seals anyways, so you will need to bleed the brakes on a regular basis to remove the moisture.

Since it carries a DOT rating, it must be compatible with the other DOT brake fluids. Note that I said compatible, because it certainly doesn't mix with the other fluids. Another reason to flush the system completely of the old brake fluid.

DOT 5 fluid tends to be rather viscous. When adding it into the system, it's real easy to get air bubbles in it which don't want to come out. It's impossible to get your brakes bled properly if there is air entrained in the brake fluid. And additional viscosity may not work with ABS.

If you're getting the stock or B13 brakes to a temperature where you need a DOT 5 fluid, you're going to be seeing other failures in the braking system, like the rotors warping and cracking, pads burning up, and the pin boots melting (if you're lucky) or catching on fire.

And for some more information, check out: http://www.muller.net/karting/docs/t...l/brfluid.html





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* There are actually two types of DOT 5 fluids. There is a SBBF (Silicone Based Brake Fluid) and an NSBF, or Non Silicone Based Fluid. DOT 5 NSBF's are not widely found, however, and are beginning to get more recognition as their popularity grows.




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got this information from http://www.se-r.net/brakes/fluid.html. I wouldn't use DOT5 on a street drivin application. You DO NOT NEED that kind of fluid for the driving your doing.

[quote name='nopistons94' date='May 26 2005, 12:22 PM']Was his car driven on the street as much as your going to be driving?


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which one?



this was a personal call from the cell of my friend to the cell of steve and thats what he said to get while we were at the parts store talking to him on the phone. steve knows that this is a street car and recommended accordingly im sure.



if there was a problem with the d5 wouldnt it have already come up? is that something that would be ok for a while and then change?