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dwayneearle's avatar
dwayneearle
Explorer
Oct 17, 2020

Brake Fluid Still Milky

Hey everyone super stumped.

Changing my 2003 Ford F53 DOT3 brake fluid due to rebuilding my rear calipers.

When bleeding the old dark fluid came out pretty quickly but then milky amber fluid immedietly followed (water contamination). Sucked out all of the old resevoir fluid and replaced but still the milky fluid persists even after 5.2 quarts.

What am I missing??
  • Perhaps someone added something else other than the correct brake fluid some time in the last 17 years.
  • Did you bleed all four wheels? I recommend a pressure bleeder.

    If the brakes feel good I would be tempted to run it as is and plan on an annual flush until it comes through clear.
  • What fluid are you using? Not all fluids are compatible with each other.
    My WH chassis took about 3 quarts for a complete flush. If you have a small pin hole leak you may be sucking some air and causing it to foam up, which gives it the milky appearance. Let some of the milky fluid sit for awhile and see if it clears up.
  • Yup. Keep flushing. There's probably a bunch trapped in the accumulators in the ABS pump, but you need a diagnostics terminal to cycle the pump when bleeding. For a DIY, just drive a while then flush again.
  • If you have vacuum pump system, you can rig up a freon can and pull a vacuum on it and use that to suck out the fluid from the right rear and suck it clear and move to each one. As someone stated you could have a pin hole in one of those flex hoses also. But that should show up on the rear and not the fronts.
  • Do you have a Hydromax power brake system with the backup electric motor? If so, keep the brake fluid cap on the reservoir while bleeding. I had the same thing while bleeding front brakes and left the top off. With the reservoir cover on I waited overnight and tried again with success.