1999 4Runner SR5 V6 - 86,000 miles
A mechanic recently told me that the dark brake fluid in my resevoir is
an indication of a bad master cylinder. I could not get him to change
the brake fluid without replacing the master cylinder, and he refused
to work on my front brakes unless I also replaced the master cylinder.
This would have increased a $500 job to $900+.
I agree that the brake fluid should be changed, but is it a bad idea to
bleed dark brake fluid through ABS brake systems (and the new calipers
that he also wanted to add on)? Even if he replaced the master
cylinder, wouldn't this dark brake fluid already be throughout the
entire brake line? He was adamant that the master cylinder was bad
based on 1) dark brake fluid and 2) increased downward brake pedal
Am I crazy, or is this overkill?
Man, if that's true, I gotta LOT of Bad Cylinders!
Brake fluid darkens with age. I have often posted instruciotns for making
a brake beelder kit...I'm not that ambitious tonight. Try this:
You can also use it for flushing the fluid, just remember to keep adding
new fluid so you don't run the cylinder dry.
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