Join Date: Apr 2017
location: Lincoln, Nebr
Thanked 9 Times in 8 Posts
I've seen tinted green fluid in other vehicles as well. I think there are components in the braking systems that use metals with higher concentrations of copper.
I believe dirty fluid is attributed to fluid over time w/ several factors: temperature fluctuations with exposure to black rubber hoses, black rubber hoses in general, and the brake fluid being hygroscopic (absorbs water) with moisture being slowly absorbed through the rubber hoses & every time the reservoir cap is opened (hence why the reservoir is transparent, so no need to open to check).
If it were a brand new car, I would expected the rubber hoses to sort of "break in" or flush/wash away the newly installed hose residue. Maybe you could attribute the debris you mentioned to this, I haven't seen too much debris in brake lines before, but I suppose it's possible. But the important thing is you got it out.
The only reason the fluid has to be flushed is because it's hygroscopic, and the boiling point drops more dramatically after 2 years. Even a severely driven car is never braked heavily enough to be concerned with boiling points, but when it comes to braking you always error on the side of caution. 3 years should be the very latest fluid should be changed, but most people stick within 2-3 yrs. Just think of how many cars out there on running on original fluid and let that sink in.
When I flush I used a clear plastic tubing a loop it upward (for bubbles to rise) over a coil and down in to powerade bottle. crack er open and pump the brakes until fluid color changes to my liking. Refill and repeat. Turkey baster the original reservoir of course. I go RR, LR, RF, LF. I use the Prestone Dot 3 "high temperature synthetic," it's probably the same with a fancy name - $6 for the quart bottle I think.
Ben: 2010 Accord EX-L sedan, 2.4L, AT, 122K, Alabaster silver metallic
Bu: 2007 Malibu LS sedan, 3.5L, 154K - wife's daily driver
Howard: 2008 Grand Prix sedan, 3.8L, 138.5K - totaled, owned 8 yrs.