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Generally contaminated brake fluid is very dark and grimy looking. It also may cause a spongy brake petal, but not always. If you have reason to believe that your brake fluid is contaminated, you should definitely have it changed. If there is more than 3% water in your brake fluid, you run the risk of super heating the water causing one or more of your brake lines to explode, which apart from being incredibly dangerous is also tremendously expensive to repair. Brake fluid is very hygroscopic, and when exposed to air, it readily absorbs water.
Yes, it absorbs moisture which makes it acidic.
Could be contaminated brake fluid
check brake hoses. check brake fluid condition, if fluid is contaminated or mixed with wrong fluid, calipers can lock-up or stick. check caliper bolts, hardware, caliper brackets. replace if broken, bent, or missing.
Contamination is indicated by Discolored Fluid Corroded Parts Soft or swollen rubber parts
You get brake fluid that will cause tooth decay
Corrosion? Contaminated brake fluid?
If non brake fluid is added to the master cylinder, possibly.If non brake fluid is added to the master cylinder, possibly.
Clear, yellowish clear, or red when new. Over time it becomes brown or black. This color change is normal and not a cause for concern. Red dyes break down before the the oils do and black dyes from the hoses are absorbed into the fluid.Some (not used in Fords) power steering fluids can be nearly clear with a pale blue or aqua tint.If the fluid is contaminated with water, DOT3 brake fluid, or DOT4 brake fluid the fluid will take on a milky (grayish or whitish possibly opaque) appearance.If contaminated with water, the fluid should be flushed.If contaminated with DOT3 or DOT4 brake fluid, firstflush fluid, then replace the pump and rack or gearbox and all hoses and lines and any cooler.
Do not pump the brakes. You will need to get all of the contaminated fluid out and refill the master cylinder.
A brake fluid leak in the brake system, LOW BRAKE FLUID.
Most Brake fluid is made of Glycol-ether. (Dot 3 being the most common). But mineral spirits is used in rare dot 5. Brake fluid is not considered hazardous until it is contaminated by other properties found in a brake system such as dust or metal.