Thread: flushing brake fluid..when to know new fluid is bled?

Yo,

So I did a brake flush tonight(I think), but was really confused on how the hell I'm supposed to figure out when the new fluid is coming through? The problem, is that my new and old brake fluid were both exactly the same color and I couldn't discern where the old fluid stopped and the new fluid started. I guess my brake fluid wasn't that dirty, but I was flushing it to put racing brake fluid in for an upcoming track day.

What am I missing? I just kinda guessed and probably overestimated how much fluid there was in the line. Ended up going through a lot of brake fluid. I know there's gotta be an easier way. Especially for guys who have track cars and are flushing brake fluid every other month.

-G

When you put the old fluid in the bottle, if its dirty then thats how you know lol
Just make sure there is no air in the lines and your good

What if your current brake fluid isn't dirty?

Just buy a bit more than whats needed and bleed it for longer.

If its not dirty and its the same color, it doesn't even necessarily need to be changed... If you got better fluid then go for it but don't worry too much if its the same thing

I did go for it..I'm wondering what people do when they have fluid of similar color. I guess they just bleed it until they think it's gone through. Thought there might have been a better trick. I was reading you could use food coloring, but that it can interact w/the fluid and gunk up over time so it's not recommended.

I normally bleed around 100-150ml of fluid out of each line. That is probably a little too much but doesnt waste/cost a lot so im not bothered.

Yeah I personally wouldn't use anything other than brake fluid.. I would say your brake fluid sounds like its good to go for a long while!!!

ATE makes 2 different colored fluids. Blue and amber. Alternate between the 2. Pretty simple.

Tire Rack : ATE

"**Florida State Law Prohibts the use of BLUE brake fluid in vehicles registered for street use**"

Wonder why that is?