so I got better brake fluid from the GP that was just ran..what I want to know is do I drain all the old brake fluid and then put the new stuff in or do I have to just use the new fluid to top it off when bleeding?
all i do is suck all the old fluid out the res and top it off with the new stuff, then bleed each wheel until the fluid coming out looks new while making sure that you keep the res toped off and it is never low.
see ya!
if it's DOT-5 then they can't mix. if it's DOT-3 or 4 then it doesn't matter. reason is that DOT-3 / 4 absorb water, DOT-5 (sillicone) repels water.
CAR GODS MADE THE 1.6 SOHC TO MAKE US 2.2 OHV GUYS FEEL BETTER.
I doubt Pat sold him that crappy DOT-5 stuff. Use a turkey baster or something and suck the old fluid from the resivior. Fill and the bleed. Bleed untill you see clean fluid.
DOT-5 isn't crappy but it CANNOT BE USED IN OUR BRAKE SYSTEMS.
You need a brake system specifically designed for it since it is slightly compressible and will eat away our seals.
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I doubt Pat sold him that crappy DOT-5 stuff. Use a turkey baster or something and suck the old fluid from the resivior. Fill and the bleed. Bleed untill you see clean fluid.
I wouldn't do that, That's going to put air in your brake lines and if you dont feel like bleeding them again don't do it.
The point of doing it is to remove ALL the old brake fluid and replace it with newer stuff. You should always do this, since the brake fluid closest to your brake caliper/drum is the dirty and worn out. I flush (bleed) my brakes a good 3-4 times a year.
i hope you bleed the master if your sucking out the old fluid from the reservior with a turkey baster.
the point of having sillicone brake fluid is the boiling point. some dot 5 fluid have a boiling point of 626 degrees F. while dot 3 /4's boiling point is much lower. when brake fluid boils, and it does as there is excessive heat comming off of the caliper you get brake fade, because a vapor is easially compressable while a fluid isn't. it condenses and sometimes you get air bubbles / moisture and you need to bleed the brakes.
if you use dot 5 then you need to bleed the brakes more often because it repels water instead of absorbing it, so if you neglect the problem the brake lines can rust easially.
CAR GODS MADE THE 1.6 SOHC TO MAKE US 2.2 OHV GUYS FEEL BETTER.
chapter10 wrote:i hope you bleed the master if your sucking out the old fluid from the reservior with a turkey baster.
the point of having sillicone brake fluid is the boiling point. some dot 5 fluid have a boiling point of 626 degrees F. while dot 3 /4's boiling point is much lower. when brake fluid boils, and it does as there is excessive heat comming off of the caliper you get brake fade, because a vapor is easially compressable while a fluid isn't. it condenses and sometimes you get air bubbles / moisture and you need to bleed the brakes.
if you use dot 5 then you need to bleed the brakes more often because it repels water instead of absorbing it, so if you neglect the problem the brake lines can rust easially.
You're right in that the silicone brake fluid is used for it's higher boiling point but as I said earlier, the brake system MUST be designed to use it. You can't just replace DOT3 or DOT4 fluid with DOT5. It is not compatable with the brake system!
DO NOT PUT DOT5 IN A J-BODY!!!!
DOT3 and DOT4 are compatable with one another. I'm running a synthetic DOT4 right now.
^^